| 4. Material accounting policy informationand significant judgements, estimates
 and assumptions
4.1 Material accounting policy informationa) Property, Plant and Equipment Property, plant and equipment includingCapital work in progress held for use in
 the production or/and supply of goods or
 services, or for administrative purposes, are
 stated at cost, except assets acquired under
 Schemes of Arrangement, which are stated
 at fair values as per the Schemes, net of
 accumulated depreciation and accumulated
 impairment losses, if any. The initial cost
 at cash price equivalent of property, plant
 and equipment acquired comprises its
 purchase price, including import duties
 and non-refundable purchase taxes, and
 directly attributable cost of bringing the
 assets to its working condition and location.
 Such cost includes the cost of replacing part
 of the Property, plant and equipment and
 borrowing costs for long term construction
 projects if the recognition criteria are met.
 The Company incurs expenditure on certainenabling assets (electrification infrastructure)
 which are necessary to provide services
 to its customers and such expenditure is
 capitalized as property, plant and equipment.
 When significant parts of property, plantand equipment are required to be replaced
 in intervals, the Company recognizes such
 parts as separate component of assets with
 specific useful lives and provides depreciation
 over their useful life. Subsequent costs are
 included in the asset's carrying amount
 or recognized as a separate asset, as
 appropriate, only when it is probable that
 future economic benefits associated with the
 item will flow to the entity and the cost of the
 item can be measured reliably. The carrying
 amount of the replaced part is derecognized.
 All other repair and maintenance costs are
 recognised in the Statement of Profit and
 Loss as incurred.
 The present value of the expected costfor the decommissioning of the asset
 after its use is included in the cost of the
 respective asset if the recognition criteria
 for a provision are met. Refer note 4.2(e)
 regarding significant accounting judgements,
 estimates and assumptions and provisions
 for further information about the recorded
 decommissioning provision.
 An item of property, plant and equipmentand any significant part initially recognised
 is derecognised upon disposal or when no
 future economic benefits are expected from
 its use or disposal. Any gain or loss arising
 on derecognition of the asset (calculated
 as the difference between the net disposal
 proceeds and the carrying amount of the
 asset) is recognised in the Statement of Profit
 and Loss when the asset is derecognised.
 Assets are depreciated to the residual valueson a straight-line basis over the estimated
 useful lives. Depreciation on property, plant
 and equipment starts when asset is available
 for use. Estimated useful lives of the assets
 are as follows:
 The existing useful lives and residual valueof tangible assets are different from the
 useful lives as prescribed under Part C of
 Schedule II to the Companies Act, 2013 and
 the Company believes that this is the best
 estimate on the basis of technical evaluation
 and actual usage period.
 The existing residual values of tangibleassets are different from 5% as prescribed
 under Part C of Schedule II to the Companies
 Act, 2013 and the Company believes that
 this is the best estimate on the basis of
 actual realization.
 The assets' residual values, depreciationmethod and useful lives are reviewed
 at each financial year end or whenever
 there are indicators for impairment and
 adjusted prospectively.
 On transition to Ind AS, the Company haselected to continue with the carrying value
 of all its property, plant and equipment
 (including assets acquired under Schemes
 of Arrangement) except with an adjustment
 in decommissioning cost recognised as at
 April 1, 2015 measured as per the previous
 GAAP and use that carrying value as the cost
 of the property, plant and equipment.
 b) Intangible AssetsIntangible assets are recognized when theentity controls the asset, it is probable that
 future economic benefits attributed to the
 asset will flow to the entity and the cost of
 the asset can be reliably measured.
 At initial recognition, the separately acquiredintangible assets are recognised at cost.
 Intangible assets with finite useful lives are
 carried at cost less accumulated amortisation
 and accumulated impairment losses, if any.
 Intangible assets are amortised over theuseful economic life and assessed for
 impairment whenever there is an indication
 that the intangible asset may be impaired.
 The amortisation period and the amortisation
 method for an intangible asset are reviewed
 at least at the end of each financial year.
 Changes in the expected useful life or the
 expected pattern of consumption of future
 economic benefits embodied in the asset
 are considered to modify the amortisation
 period or method, as appropriate, and are
 treated as changes in accounting estimates.
 The amortisation expense on intangible
 assets is recognised in the Statement of Profit
 and Loss unless such expenditure forms part
 of carrying value of another asset.
 Software is capitalized at the amounts paidto acquire the respective license for use
 and is amortised over the period of license,
 generally not exceeding three years.
 Gains or losses arising from derecognitionof an intangible asset are measured as the
 difference between the net disposal proceeds
 and the carrying amount of the asset and are
 recognised in the Statement of Profit and
 Loss when the asset is derecognised.
 c) Impairment of non-financial assetsThe Company assesses at each reportingdate, whether there is an indication that
 an asset may be impaired. If any indication
 exists, or when annual impairment testing for
 an asset is required, the Company estimates
 the asset's recoverable amount. An asset's
 recoverable amount is the higher of an
 asset's or cash-generating unit's (CGU) fair
 value less costs of disposal and its value in
 use. Recoverable amount is determined for
 an individual asset, unless the asset does
 not generate cash inflows that are largely
 independent of those from other assets or
 group of assets. When the carrying amount
 of an asset or CGU exceeds its recoverable
 amount, the asset is considered impaired and
 is written down to its recoverable amount.
 In assessing value in use, the estimated futurecash flows are discounted to their present
 value using a pre-tax discount rate that
 reflects current market assessments of the
 time value of money and the risks specific tothe asset. In determining fair value less costs
 of disposal, recent market transactions are
 taken into account. If no such transactions
 can be identified, an appropriate valuation
 model is used. Impairment losses, if any, are
 recognized in the statement of profit and
 loss as a component of depreciation and
 amortisation expense.
 A previously recognised impairment loss isreversed only if there has been a change in the
 assumptions used to determine the asset's
 recoverable amount since the last impairment
 loss was recognised. The reversal is limited to
 the extent the carrying amount of the asset
 does not exceed its recoverable amount,
 nor exceed the carrying amount that would
 have been determined, net of depreciation or
 amortisation, had no impairment loss been
 recognised for the asset in prior years. Such a
 reversal is recognized in the Statement of
 Profit and Loss when the asset is carried
 at the revalued amount, in which case the
 reverse is treated as a revaluation increase.
 d) Current versus non-current classificationThe Company presents assets and liabilitiesin the balance sheet based on current/
 non-current classification. An asset is treated
 as current when it is:
 •    Expected to be realised or intendedto be sold or consumed in normal
 operating cycle
 •    Held primarily for the purpose of trading •    Expected to be realised within twelvemonths after the reporting period, or
 •    Cash or cash equivalent unless restrictedfrom being exchanged or used to settle
 a liability for at least twelve months after
 the reporting period
 Current assets include the current portionof non-current assets. All other assets are
 classified as non-current.
 A liability is current when: •    It is expected to be settled in normaloperating cycle
 •    It is held primarily for the purpose oftrading
 •    It is due to be settled within twelvemonths after the reporting period, or
 •    There is no unconditional right to deferthe settlement of the liability for at least
 twelve months after the reporting period
 Current liabilities include the current portionof long-term liabilities. The Company
 classifies all other liabilities as non-current.
 Deferred tax assets and liabilities areclassified as non-current assets and liabilities.
 The operating cycle is the time betweenthe acquisition of assets for processing and
 their realisation in cash and cash equivalents.
 The Company has identified twelve months
 as its operating cycle.
 e) LeasesThe Company assesses whether a contractcontains a lease, at the inception of a
 contract. A contract is, or contains, a lease
 if the contract conveys the right to control
 the use of an identified asset for a period
 of time in exchange for consideration.
 To assess whether a contract conveys the
 right to control the use of an identified
 asset, the Company assesses whether (i)
 the contract involves the use of an identified
 asset (ii) the Company has substantially all
 of the economic benefits from use of the
 asset through the period of the lease and
 (iii) the Company has the right to direct the
 use of the asset.
 Company as a lesseeThe Company recognizes right-of-useasset (ROU) representing its right to use
 the underlying asset for the lease term
 and a corresponding lease liability at the
 lease commencement date. The cost of the
 right-of-use asset measured at inception
 shall comprise of the amount of the initial
 measurement of the lease liability adjusted
 for any lease payments made at or before
 the commencement date less any lease
 incentives received, plus any initial direct
 costs incurred. The right-of-use asset is
 subsequently measured at cost less anyaccumulated depreciation, accumulated
 impairment losses, if any and adjusted for
 any remeasurement of the lease liability.
 The right-of-use asset is depreciated from
 the commencement date on a straight-line
 basis over the shorter of the lease term
 and useful life of the underlying asset.
 Right-of-use assets are tested for impairment
 whenever there is any indication that their
 carrying amounts may not be recoverable.
 Impairment loss, if any, is recognised in the
 statement of profit and loss.
 The Company measures the lease liability atthe present value of the lease payments that
 are not paid at the commencement date of
 the lease. The lease payments are discounted
 using the interest rate implicit in the lease,
 if that rate can be readily determined.
 If that rate cannot be readily determined,
 the Company uses an incremental borrowing
 rate. For leases with reasonably similar
 characteristics, the Company may adopt the
 incremental borrowing rate for the entire
 portfolio of leases. The lease payments
 shall include fixed payments, variable
 lease payments, residual value guarantees,
 exercise price of a purchase option where the
 Company is reasonably certain to exercise
 that option and payments of penalties for
 terminating the lease, if the lease term
 reflects the lessee exercising an option to
 terminate the lease. The lease liability is
 subsequently remeasured by increasing the
 carrying amount to reflect interest on the
 lease liability, reducing the carrying amount
 to reflect the lease payments made and
 remeasuring the carrying amount to reflect
 any reassessment or lease modifications
 or to reflect revised in-substance fixed
 lease payments.
 The Company recognises the amount ofthe re-measurement of lease liability as
 an adjustment to the right-of-use asset.
 Where the carrying amount of the right-of-
 use asset is reduced to zero and there is a
 further reduction in the measurement of the
 lease liability, the Company recognizes any
 remaining amount of the re-measurement in
 the statement of profit and loss.
 The Company has elected not to recognizeROU and lease liabilities for short term leases
 that have a lease term of twelve months or
 less and leases of low value assets. The lease
 payments associated with these leases are
 recognized as an expense on a straight-line
 basis over the lease term.
 The Company has elected to recognize theasset retirement obligation liability as part
 of the cost of an item of property, plant and
 equipment in accordance with Ind AS 16,
 Property, plant and equipment.
 Company as a lessorAt the inception date, leases are classifiedas a finance lease or an operating lease.
 Leases are classified as finance leases when
 substantially all of the risks and rewards of
 ownership transfer from the Company to
 the lessee. Amounts due from lessees under
 finance leases are recorded as receivable
 at the Company's net investment in the
 leases. Finance lease income is allocated to
 accounting periods so as to reflect a constant
 periodic rate of return on the net investment
 outstanding in respect of the lease.
 Leases where the Company does nottransfer substantially all the risks and
 rewards incidental to ownership of the
 assets are classified as operating leases.
 Lease rentals under operating leases are
 recognized as income on a straight-line basis
 over the lease term. Contingent rents are
 recognized as revenue in the period in which
 they are earned.
 f) Share-based paymentsThe Company issues equity-settled andcash-settled share-based options to certain
 employees. These are measured at fair value
 on the date of grant.
 The fair value determined at the grant dateof the equity-settled share-based options is
 expensed over the vesting period, based on
 the Company's estimate of the shares that
 will eventually vest.
 The fair value determined on the grant dateof the cash settled share based options is
 expensed over the vesting period, based
 on the Company's estimate of the sharesthat will eventually vest. At the end of each
 reporting period, until the liability is settled,
 and at the date of settlement, the fair value of
 the liability is recognized, with any changes
 in fair value pertaining to the vested period
 recognized immediately in the Statement of
 Profit and Loss.
 At the vesting date, the Company's estimateof the shares expected to vest is revised
 to equal the number of equity shares that
 ultimately vest.
 Fair value is measured using Black-Scholesframework by an independent valuer and
 is recognized as an expense, together
 with a corresponding increase in equity/
 liability as appropriate, over the period
 in which the options vest using the
 graded vesting method. The expected life
 used in the model is adjusted, based on
 management's best estimate, for the effects
 of non-transferability, exercise restrictions
 and behavioral considerations. The expected
 volatility and forfeiture assumptions are
 based on historical information.
 Where the terms of share-based payments aremodified, the minimum expense recognized
 is the expense as if the terms had not been
 modified, if the original terms of the award
 are met. An additional expense is recognized
 for any modification that increases the
 total fair value of the share-based payment
 transaction or is otherwise beneficial to
 the employee as measured at the date
 of modification.
 Where an equity-settled award is cancelled,it is treated as if it is vested on the date
 of cancellation, and any expense not yet
 recognized for the award is recognized
 immediately. This includes any award where
 non-vesting conditions within the control
 of either the entity or the employee are not
 met. However, if a new award is substituted
 for the cancelled award and designated as
 a replacement award on the date that it is
 granted, the cancelled and new awards
 are treated as if they were a modification
 of the original award, as described in the
 previous paragraph.
 The dilutive effect of outstanding options, ifany, is reflected as additional share dilution in
 the computation of diluted earnings per share.
 g)    Cash and cash equivalentsCash and cash equivalents in the balancesheet comprise cash at banks and in hand
 and short-term deposits with an original
 maturity of three months or less, which are
 subject to an insignificant risk of changes in
 value. Bank overdrafts that are repayable
 on demand and form an integral part of the
 Company's cash management are included as
 a component of cash and cash equivalents for
 the purpose of the Statement of Cash Flows.
 h)    Financial instrumentsA financial instrument is any contract thatgives rise to a financial asset of one entity
 and a financial liability or equity instrument
 of another entity.
 Financial assetsInitial recognition and measurement All financial assets are recognised initially atfair value plus, in the case of financial assets
 not recorded at fair value through profit or
 loss, transaction costs that are attributable
 to the acquisition of the financial asset.
 However, trade receivables that do not
 contain a significant financing component
 are measured at transaction price.
 Subsequent measurementFor purposes of subsequent measurement,financial assets are classified in
 four categories:
 •    Debt instruments at amortised cost •    Debt instruments at fair value throughother comprehensive income (FVTOCI)
 •    Debt instruments, derivatives and equityinstruments at fair value through Profit
 or Loss (FVTPL)
 •    Equity instruments measured at fairvalue through other comprehensive
 income (FVTOCI)
 Debt instruments at amortised costThis category applies to the Company'strade receivables, unbilled revenue,
 security deposits etc.
 A 'debt instrument' is measured at theamortised cost if both the following
 conditions are met:
 a)    The asset is held within a business modelwhose objective is to hold assets for
 collecting contractual cash flows and
 b)    Contractual terms of the asset giverise on specified dates to cash flows
 that are solely payments of principal
 and interest (SPPI) on the principal
 amount outstanding
 After initial measurement, such financialassets are subsequently measured at
 amortised cost using the effective interest rate
 (EIR) method. Amortised cost is calculated
 by taking into account any discount or
 premium on acquisition and fees or costs
 that are an integral part of the EIR. The EIR
 amortisation is included in finance income in
 the Statement of Profit and Loss. The losses
 arising from impairment are recognised in
 the Statement of Profit and Loss.
 Debt instrument at fair value through othercomprehensive income (FVTOCI)
A 'debt instrument' is classified at FVTOCI ifboth of the following criteria are met:
 a)    The objective of the business modelis achieved both by collecting
 contractual cash flows and selling the
 financial assets, and
 b)    The asset's contractual cash flowsrepresent SPPI.
 Debt instruments included within theFVTOCI category are measured initially as
 well as at each reporting date at fair value.
 Fair value movements are recognized in
 the other comprehensive income (OCI).
 However, the Company recognizes interest
 income, impairment losses and reversals
 in the Statement of Profit and Loss.
 On derecognition of the asset, cumulative
 gain or loss previously recognised in OCI isreclassified from the equity to the Statement
 of Profit and Loss.
 I nterest earned whilst holding FVTOCI debtinstrument is reported as interest income.
 The Company does not have any debt
 instrument which is required to be classified
 in this category.
 Debt instrument at fair value through profitor loss (FVTPL)
FVTPL is a residual category for debtinstruments. Any debt instrument, which
 does not meet the criteria for categorization
 at amortized cost or at FVTOCI, is
 classified at FVTPL.
 Debt instruments included within the FVTPLcategory are measured at fair value with
 all changes recognized in the Statement of
 Profit and Loss. This category applies to
 the Company's investment in government
 securities, mutual funds, taxable bonds and
 non-convertible debentures.
 In addition, the Company may elect todesignate a debt instrument, which otherwise
 meets amortized cost or FVTOCI criteria, as
 at FVTPL. However, such election is allowed
 only if doing so reduces or eliminates a
 measurement or recognition inconsistency
 (referred to as 'accounting mismatch').
 The Company does not have any debt
 instrument which is required to be classified
 in this category.
 Derivative instrumentThe Company uses derivative financialinstruments, such as forward currency
 contracts to hedge its foreign currency risk.
 These derivative financial instruments are
 initially recognised at fair value on the date
 when the derivative contract is entered into
 and are subsequently re-measured at fair
 value at the end of each reporting period.
 Any changes in fair value are recognised in the
 statement of profit and loss. Derivatives are
 carried as financial assets when the fair value
 is positive and as financial liabilities when
 their fair value is negative.
 The Company does not hold derivativefinancial instruments for speculative purposes.
 Equity investment in subsidiary Equity investment in subsidiary is carried atcost less impairment, if any.
 Equity investments measured at fairvalue through profit or loss (FVTPL) or at
 fair value through other comprehensive
 income (FVTOCI)
 All equity investments within the scope of IndAS 109, Financial Instruments, are measured
 at fair value. Equity instruments which are
 held for trading are measured at FVTPL.
 For equity instruments not held for trading
 are measured at FVTOCI.
 De-recognition:- A financial asset (or,where applicable, a part of a financial
 asset) is primarily derecognised
 (i.e. removed from the Company's
 balance sheet) when:
 a)    The contractual rights to receive cashflows from the asset have expired, or
 b)    The Company has transferred itscontractual rights to receive cash flows
 from the financial asset or has assumed
 an obligation to pay the received cash
 flows in full without material delay to
 a third party under a 'pass-through'
 arrangement; and either (a) the
 Company has transferred substantially
 all the risks and rewards of the asset, or
 (b) the Company has neither transferred
 nor retained substantially all the risks and
 rewards of the asset, but has transferred
 control of the asset.
 Impairment of financial assetsIn accordance with Ind AS 109, FinancialInstruments, the Company applies expected
 credit loss (ECL) model for measurement
 and recognition of impairment loss on the
 financial assets that are debt instruments
 and are initially measured at fair value with
 subsequent measurement at amortised cost.
 The Company follows 'simplified approach'for recognition of impairment loss allowance
 for trade receivables.
 The application of a simplified approachdoes not require the Company to track
 changes in credit risk. Rather, it recognises
 impairment loss allowance based on lifetime
 ECLs at each reporting date, right from its
 initial recognition.
 For recognition of impairment loss on otherfinancial assets and risk exposure, the
 Company determines whether there has
 been a significant increase in the credit risk
 since initial recognition. If credit risk has
 not increased significantly, twelve month
 ECL is used to provide for impairment
 loss. However, if credit risk has increased
 significantly, lifetime ECL is used. If, in the
 subsequent period, credit quality of the
 instrument improves such that there is no
 longer a significant increase in credit risk
 since initial recognition, then the entity
 reverts to recognising impairment loss
 allowance based on a twelve month ECL.
 ECL is the difference between all contractualcash flows that are due to the Company in
 accordance with the contract and all the
 cash flows that the entity expects to receive
 (i.e., all cash shortfalls), discounted at
 the original EIR.
 Financial LiabilitiesInitial recognition and measurement Financial liabilities are classified, at initialrecognition, as financial liabilities at fair value
 through profit or loss, loans and borrowings
 or payables, as appropriate.
 All financial liabilities are recognised initiallyat fair value and, in the case of loans and
 borrowings and payables, net of directly
 attributable transaction costs. The Company's
 financial liabilities include borrowings, trade
 and other payables, security deposits, lease
 liabilities etc.
 Subsequent measurementThe measurement of financial liabilitiesdepends on their classification, as
 described below:
 Financial liabilities at fair value throughprofit and loss (FVTPL)
Financial liabilities at fair value through profitor loss include financial liabilities held for
 trading and financial liabilities designatedupon initial recognition as at fair value
 through profit or loss. Financial liabilities
 are classified as held for trading if they are
 incurred for the purpose of repurchasing
 in the near term.
 Financial liabilities designated upon initialrecognition at fair value through profit or
 loss are designated as such at the initial date
 of recognition, and only if the criteria in Ind
 AS 109, Financial Instruments, are satisfied.
 For liabilities designated as FVTPL, fair
 value gains/ losses attributable to changes
 in own credit risk are recognized in OCI.
 These gains / losses are not subsequently
 transferred to the Statement of Profit and
 Loss. However, the Company may transfer
 the cumulative gain or loss within equity.
 All other changes in fair value of such liability
 are recognised in the statement of profit
 and loss. The Company does not have any
 financial liability which is required to be
 classified in this category.
 Financial liabilities at amortised costThis category includes security depositreceived, trade payables etc. After initial
 recognition, such liabilities are subsequently
 measured at amortised cost using the EIR
 method. Gains and losses are recognised in
 the Statement of Profit and Loss when the
 liabilities are derecognised as well as through
 the EIR amortisation process. Amortised cost
 is calculated by taking into account any
 discount or premium on acquisition and fees
 or costs that are an integral part of the EIR.
 The EIR amortisation is included as finance
 costs in the Statement of Profit and Loss.
 De-recognitionFinancial liability is derecognised when theobligation under the liability is discharged
 or cancelled or expires. When an existing
 financial liability is replaced by another from
 the same lender on substantially different
 terms or the terms of an existing liability are
 substantially modified, such an exchange or
 modification is treated as the de-recognition
 of the original liability and the recognition
 of a new liability. The difference in the
 respective carrying amounts is recognised in
 the Statement of Profit and Loss.
 Reclassification of financial assetsThe Company determines classificationof financial assets and liabilities on initial
 recognition. After initial recognition, no
 reclassification is made for financial assets
 which are equity instruments and financial
 liabilities. For financial assets which are debt
 instruments, a reclassification is made only
 if there is a change in the business model
 for managing those assets. Changes to the
 business model are expected to be infrequent.
 The Company's senior management
 determines change in the business model as
 a result of external or internal changes which
 are significant to the Company's operations.
 Such changes are evident to external parties.
 A change in the business model occurs
 when the Company either begins or ceases
 to perform an activity that is significant to
 its operations. If the Company reclassifies
 financial assets, it applies the reclassification
 prospectively from the reclassification date,
 which is the first day of the immediately
 next reporting period following the change
 in business model. The Company does not
 restate any previously recognised gains,
 losses (including impairment gains or
 losses) or interest.
 The Company has not reclassified anyfinancial assets and financial liabilities after
 initial recognition.
 Offsetting of financial instrumentsFinancial assets and financial liabilities areoffset, and the net amount is reported in
 the balance sheet if there is a currently
 enforceable legal right to offset the
 recognised amounts and there is an intention
 to settle on a net basis, to realise the assets
 and settle the liabilities simultaneously.
 i) Revenue recognitionThe Company earns revenue primarilyfrom rental services by leasing of passive
 infrastructure and energy revenue by the
 provision of energy for operation of sites.
 Revenue is recognized when the Companysatisfies the performance obligation by
 transferring the promised services to
 the customers. Services are considered
 performed when the customer obtains
 control, whereby the customer gets the
 ability to direct the use of such services
 and substantially obtains all benefits from
 the services. When there is uncertainty as
 to measurement or ultimate collectability,
 revenue recognition is postponed until such
 uncertainty is resolved.
 Revenue towards satisfaction of aperformance obligation is measured at the
 amount of transaction price adjusted with
 variable consideration, if any is allocated to
 that performance obligation. Revenue also
 excludes taxes collected from the customers.
 In order to determine if it is acting asprincipal or as an agent, the entity shall
 determine whether the nature of its promise
 is a performance obligation to provide the
 specified services itself (i.e. the entity is a
 principal) or to arrange for those services to
 be provided by the other party (i.e. the entity
 is an agent) for all its revenue arrangements.
 Service revenueService revenue includes rental revenue forthe use of sites, recoveries of rates and taxes
 (e.g. municipal taxes relating to the sites) and
 energy revenue for the provision of energy
 for operation of sites.
 Rental revenue is recognized as and whenservices are rendered on a monthly basis as
 per the contractual terms prescribed under
 master service agreement entered with
 customer. The Company has ascertained
 that the lease payments received are straight
 lined over the period of the contract.
 Exit Charges on site exit and equipmentde-loading is recognised when uncertainty
 relating to such exit and de-loading is
 resolved and it is probable that a significant
 reversal relating to recoverability of these
 charges will not occur.
 When the Company receives an upfrontreimbursement from its customer towards
 recovery of capital expenditure, the upfront
 consideration received is deferred and
 recognised as revenue over the period
 of the contract.
 Energy revenue is recognized over theperiod on a monthly basis upon satisfaction
 of performance obligation as per contracts
 with the customers. The transaction price is
 the consideration received from customers
 based on prices agreed as per the contract
 with the customers. The determination of
 standalone selling prices is not required
 as the transaction prices are stated in
 the contract based on the identified
 performance obligation.
 Unbilled revenue represents revenuesrecognized for the services rendered for the
 period falling after the last invoice raised to
 customers till the period end. These are billed
 in subsequent periods based on the prices
 specified in the master service agreement
 with the customers, whereas invoicing in
 excess of revenues are classified as unearned
 revenues. The Company collects GST on
 behalf of the government and therefore, it
 is not an economic benefit flowing to the
 Company, hence it is excluded from revenue.
 Sale of goods / equipment and relatedservices:
The Company recognises revenues fromsale of products measured at the amount
 of transaction price (net of variable
 consideration), when it satisfies its
 performance obligation at a point in time
 which is when products are delivered to
 customer, which is when control including
 risks and rewards and title of ownership pass
 to the customer, collectability of the resulting
 receivables is reasonably assured and when
 there are no longer any unfulfilled obligation.
 Use of significant judgements in revenuerecognition
The Company's contracts with customersinclude promises to transfer services to a
 customer which are energy and rentals.
 Rentals are not covered within the scope of
 Ind AS 115, Revenue from Contracts with
 Customers, hence identification of distinct
 performance obligation within Ind AS 115,
 Revenue from Contracts with Customers, do
 not involve significant judgement.
 Judgement is required to determinethe transaction price for the contract.
 The transaction price could be either afixed amount of customer consideration or
 variable consideration with elements such
 as discounts, service level credits, waivers
 etc. The estimated amount of variable
 consideration is adjusted in the transaction
 price only to the extent that it is highly
 probable that a significant reversal in the
 amount of cumulative revenue recognised
 will not occur and is reassessed at the end of
 each reporting period.
 I n evaluating whether a significant revenuereversal will not occur, the Company considers
 the likelihood and magnitude of the revenue
 reversal and evaluates factors which result
 in constraints such as historical experience
 of the Company with a particular type of
 contract, and the regulatory environment in
 which the customers operate which results in
 uncertainty which is less likely to be resolved
 in the near future.
 The Company provides a volume discountto its customers based on the slab defined
 in the revenue contracts. The contract also
 contains clause on Service Level Penalty/
 rewards in case the Company is not able
 to maintain uptime level mentioned in the
 agreement. These discount/penalties are
 called variable consideration.
 There is no additional impact of variableconsideration as per Ind AS 115, Revenue from
 Contracts with Customers, since maximum
 discount is already being given to customers
 and the same is deducted from revenue.
 There is no additional impact of SLA penaltyas the Company already estimates SLA
 penalty amount and the same is provided
 for at each month end. The SLA penalty
 is presented as net off with revenue in the
 Statement of profit and loss.
 Determination of standalone selling pricedoes not involve significant judgement
 for the Company. The Company exercises
 judgement in determining whether the
 performance obligation is satisfied at a point
 in time or over a period of time. The Company
 considers the indicators on how customer
 consumes benefits as services are rendered
 in making the evaluation. Contract fulfillment
 costs are generally expensed as incurred.The assessment of this criteria requires the
 application of judgement, in particular when
 considering if costs generate or enhance
 resources to be used to satisfy future
 performance obligations and whether costs
 are expected to be recovered.
 j)    Finance incomeFinance income comprises of interest incomeon funds invested, changes in the fair value
 of financial assets at fair value through
 profit or loss, and that are recognised in the
 Statement of Profit and Loss and interest
 income on delayed payment from operators.
 Interest income for changes in the fairvalue of financial assets is recognised as
 it accrues in the Statement of Profit and
 Loss, using the effective interest rate (EIR)
 which is the rate that exactly discounts the
 estimated future cash receipts through the
 expected life of the financial instrument or
 a shorter period, where appropriate, to the
 net carrying amount of the financial asset.
 Interest on delayed payment from operators
 is recognized as income when uncertainty
 relating to amount receivable is resolved
 and it is probable that a significant reversal
 relating to this amount will not occur.
 k)    Other incomeOther income includes interest income,interest on income tax refund, gain on sale of
 property, plant and equipment etc. Any gain
 or loss arising on derecognition of property,
 plant and equipment is calculated as the
 difference between the net disposal proceeds
 and the carrying amount of the asset.
 l)    Finance costFinance costs comprise Borrowing cost,interest expense on lease obligations,
 accretion of interest on site restoration
 obligation and security deposits received.
 m)    Income taxesThe income tax expense comprisesof current and deferred income tax.
 Income tax is recognised in the statement
 of profit and loss, except to the extent that
 it relates to items recognised in the other
 comprehensive income or directly in equity,
 in which case the related income tax is also
 recognised accordingly.
 The current tax is calculated on the basis ofthe tax rates, laws and regulations, which
 have been enacted or substantively enacted
 as at the reporting date. The payment made
 in excess / (shortfall) of the Company's
 income tax obligation for the period are
 recognised in the balance sheet as current
 income tax assets / liabilities. Any interest
 related to accrued liabilities for potential tax
 assessments are not included in Income tax
 charge or (credit), but are rather recognised
 within finance costs. The management
 periodically evaluates positions taken in
 the tax returns with respect to situations in
 which applicable tax regulations are subject
 to interpretation and establishes provisions
 where appropriate.
 Current tax assets and current tax liabilitiesare off set against each other and the resultant
 net amount is presented in the balance sheet
 where the Company has a legally enforceable
 right to set off the recognized amounts and
 where the Company intends either to settle
 on a net basis, or to realize the asset and
 settle the liability simultaneously.
 Deferred tax is recognised, using the balancesheet approach, on temporary differences
 arising between the tax bases of assets and
 liabilities and their carrying values in the
 financial statements. However, deferred
 tax is not recognised if it arises from initial
 recognition of an asset or liability in a
 transaction other than a business combination
 that at the time of the transaction affects
 neither accounting nor taxable profit or loss.
 A deferred tax liability is recognised basedon the expected manner of realisation
 or settlement of the carrying amount of
 assets and liabilities and deferred tax assets
 are recognised only to the extent that it
 is probable that future taxable profit will
 be available against which the temporary
 differences can be utilised. The unrecognised
 deferred tax assets / carrying amount
 of deferred tax assets are reviewed at
 each reporting date for recoverability and
 adjusted appropriately.
 Deferred tax is determined using tax rates(and laws) that have been enacted or
 substantively enacted by the reporting date
 and are expected to apply when the related
 deferred income tax asset is realised or the
 deferred income tax liability is settled.
 Deferred tax assets and liabilities are off-setagainst each other and the resultant net
 amount is presented in the balance sheet, if
 and only when, (a) the Company currently
 has a legally enforceable right to set-off the
 current income tax assets and liabilities, and
 (b) when it relates to income tax levied by
 the same taxation authority.
 Further, the Company periodically evaluatespositions taken in the tax returns with
 respect to situations in which applicable tax
 regulations are subject to interpretation.
 The Company considers whether it is
 probable that a taxation authority will
 accept an uncertain tax treatment. If the
 Company concludes it is probable that the
 taxation authority will accept an uncertain
 tax treatment, it determines the taxable
 profit (tax loss), tax bases, unused tax losses,
 unused tax credits or tax rates consistently
 with the tax treatment used or planned to be
 used in its income tax filings. If the Company
 concludes it is not probable that the taxation
 authority will accept an uncertain tax
 treatment, the Company reflects the effect
 of uncertainty in determining the related
 taxable profit (tax loss), tax bases, unused
 tax losses, unused tax credits or tax rates.
 The Company reflects the effect of uncertain
 tax positions in the overall measurement
 of tax expense and are based on the most
 likely amount or the expected value arrived
 at by the Company which provides a better
 prediction of the resolution of uncertainty.
 Significant judgments are involved indetermining the provision for income
 taxes, including amount expected to
 be paid/recovered for uncertain tax
 positions. Uncertain tax positions are
 monitored and updated as and when new
 information becomes available, typically
 upon examination or action by the taxing
 authorities or through statute expiration and
 judicial precedent.
 n)    InventoriesI nventories are valued at the lower of costand net realisable value. Cost includes cost
 of purchase and other costs incurred in
 bringing the inventories to their present
 location and condition. Cost is determined
 using a weighted average method.
 Net realisable value is the estimated sellingprice in the ordinary course of business,
 less estimated costs of completion and the
 estimated costs necessary to make the sale.
 o)    Business Combination amongst entitiesunder common control transactions
Transactions arising from transfers ofassets / liabilities, interest in entities or
 businesses between entities that are under
 the common control, are accounted at their
 carrying amounts. The difference between
 any consideration paid / received and the
 aggregate carrying amounts of assets /
 liabilities and interests in entities acquired /
 disposed (other than impairment, if any), is
 recorded in capital reserve / retained earnings
 / common control reserve, as applicable.
 p)    Dividend paymentsFinal dividend is recognised when it isapproved by the shareholders and the
 distribution is no longer at the discretion
 of the Company. However, Interim
 dividends are recorded as a liability on
 the date of declaration by the Company's
 Board of Directors.
 q)    Retirement and other employee benefitsShort term employee benefits are recognisedin the period during which the services
 have been rendered. All employee benefits
 expected to be settled wholly within
 twelve months of rendering the service are
 classified as short-term employee benefits.
 When an employee has rendered service to
 the Company during an accounting period,
 the Company recognises the undiscounted
 amount of short-term employee benefits
 expected to be paid in exchange for that
 service as an expense unless another Ind
 AS requires or permits the inclusion of the
 benefits in the cost of an asset. Benefits such as
 salaries, wages and short-term compensated
 absences and bonus etc. are recognised in
 statement of profit and loss in the periodin which the employee renders the related
 service. A liability is recognised for the
 amount expected to be paid after deducting
 any amount already paid under short-term
 cash bonus or profit-sharing plans if the
 Company has a present legal or constructive
 obligation to pay this amount as a result of
 past service provided by the employee, and
 the obligation can be estimated reliably.
 The Company post-employment benefitsinclude defined benefit plan and defined
 contribution plans. The Company also
 provides other benefits in the form of deferred
 compensation and compensated absences.
 A defined contribution plan is apost-employment benefit plan under which
 an entity pays fixed contributions to a
 statutory authority and will have no legal
 or constructive obligation to pay further
 amounts. The Company contributions to
 defined contribution plans are recognized
 in the statement of profit and loss when
 the related services have been rendered.
 The Company has no further obligations under
 these plans beyond its periodic contributions.
 A defined benefit plan is a post-employmentbenefit plan other than a defined contribution
 plan. Under the defined benefit retirement
 plan, the Company provides retirement
 obligation in the form of Gratuity. Under the
 plan, a lump sum payment is made to eligible
 employees (including contractual employees
 as per their terms of contract) at retirement
 or termination of employment based on
 respective employee salary and years of
 experience with the Company.
 The cost of providing benefits under thisplan is determined on the basis of actuarial
 valuation carried out half yearly by an
 independent qualified actuary using the
 projected unit credit method. Actuarial gains
 and losses are recognised in full in the period
 in which they occur in other comprehensive
 income forming part of the statement of
 profit and loss.
 The obligation towards the said benefit isrecognised in the balance sheet on the basis
 of the present value of the defined benefit
 obligation as the Company does not haveany plan asset.
 All expenses excluding remeasurementsof the net defined benefit liability (asset),
 in respect of defined benefit plans are
 recognized in the profit or loss as incurred.
 Remeasurements, comprising actuarial gains
 and losses and the return on the plan assets
 (excluding amounts included in net interest
 on the net defined benefit liability (asset)),
 are recognized immediately in the Balance
 Sheet with a corresponding debit or credit
 through other comprehensive income in the
 period in which they occur. Remeasurements
 are not reclassified to profit or loss in
 subsequent periods.
 The Company provides other benefits in theform of compensated absences and long
 term service awards. The employees of
 the Company are entitled to compensated
 absences based on the unavailed leave
 balance. The Company records liability
 based on actuarial valuation computed
 under projected unit credit method.
 Actuarial gains / losses are immediately
 taken to the Statement of Profit and Loss
 and are not deferred. The Company presents
 the entire leave encashment liability as a
 current liability in the balance sheet, since
 the Company does not have an unconditional
 right to defer its settlement for more than 12
 months after the reporting date.
 Under the long term service award plan, alump sum payment is made to an employee
 on completion of specified years of service.
 The Company records the liability based on
 actuarial valuation computed under projected
 unit credit method. Actuarial gains / losses
 are immediately taken to the Statement
 of Profit and Loss and are not deferred.
 The amount charged to the statement of
 profit and loss in respect of these plans is
 included within employee benefit expenses.
  
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