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NET-METERING REFERENCE GUIDE FORELECTRICITY CONSUMERHow to get your solar system connected toNational Grid in PakistanALTERNATIVE ENERGY DEVELOPMENT BOARD2nd Floor, OPF Building G-5/2 Islamabad.www.aedb.org
Prepared byMasoud WahidAEDB (Ministry of Water & Power)
Table of ContentsGlossary . iii1.2.Introduction. 11.ABackground . 11.BAbout Net Metering . 11.CNet Metering in Pakistan . 2How to apply for net-metering. 32.A2.A.1Application for net-metering. 32.A.2Acknowledgement of application . 32.A.3Initial review . 32.A.4Technical feasibility in initial review . 42.A.5Agreement . 42.A.6Generation license. 42.A.7Connection Charge Estimate. 42.A.8Installation of interconnection facility . 52.B3.Fee. 5Interconnection Requirements . 73.AInitial requirements . 73.A.1NOC by Electrical Inspector . 73.A.2Single line diagram . 73.A.3Technical standards. 83.A.4Load flow study . 83.BMandatory safety requirements . 83.B.1Anti-islanding . 83.B.2Interconnection disconnect switch . 83.CSafety recommendations . 83.C.1Earthing Protection . 83.C.2Lightning and surge protection . 93.C.3Circuit breakers . 93.D4.Overview and timeline of the procedure . 3Extra precautions . 9How to buy a solar system from your installer . 114.ASelecting components for solar system . 114.A.1Which modules to buy . 114.A.2Choosing inverters . 134.A.3Choosing batteries. 144.A.4Selecting mounting systems and warranty . 154.A.5DC Wiring. 164.BImportant aspects of a PV system . 17i
5.4.B.1Household solar system . 174.B.2Commercial and industrial scale PV system . 184.CHow do I find a good vendor? . 184.DImportant aspects considering the installation . 194.D.1Quality aspects of installation and mounting . 194.D.2Quality assurance during operation time . 194.D.3Maintenance of the PV system . 19Financing solar system. 215.A6.7.State Bank of Pakistan’s Refinancing Scheme for Renewable Energy . 21FAQs . 236.AAbout Net Metering . 236.BEligibility criteria for Net Metering . 236.CHow Net Metering works . 246.DBenefits of Net Metering . 246.ERE system for Net Metering . 256.FEconomics of Net Metering . 256.GPost installation . 25List of useful links and organizations . 277.ANational Electric Power Regulatory Authority (NEPRA) . 277.BDISCOs in Pakistan . 277.CList of electrical inspector. 297.C.1Punjab . 297.C.2Khyber Pakhtunkhwa . 307.C.3Sindh . 307.C.4Balochistan. 317.DPrivate Solar Associations in Pakistan . 31Annex I . 33Annex II . 41ii
QESCOQTPRESBPROISEPCOSTCTESCOULAlternative Energy Development BoardConnection Charge EstimateCertificate of ComplianceDevelopment Finance InstituteDistributed GeneratorDistribution CompanyEuropean StandardFaisalabad Electric Supply CompanyGujranwala Electric Supply companyHyderabad Electric Supply CompanyInternational Electro-technical CommissionInstitute of Electrical and Electronics EngineersIslamabad Electric Supply CompanyKilowattsKilowatt hourKilowatt peakLahore Electric Supply CompanyLocal Government UnitMultan Electric Power CompanyMegawattNational Electric Power Regulatory AuthorityNon-governmental organizationPeshawar Electric Supply CompanyPakistani RupeePhotovoltaicQualified End UsersQuetta Electric Supply CompanyQualified Third PartyRenewable EnergyState Bank of PakistanReturn on InvestmentSukkur Electric Power CompanyStandard Test ConditionTribal Electric Supply CompanyUnderwriters Laboratoriesiii
List of FiguresFigure1.1: Net Metering process . . .1Figure4.1: Solar PV system . . . .11Figure4.2: Thin film module . .12Figure4.3: Crystalline Module (c-Si) . .12Figure4.4: Grid connected inverter .13Figure4.5: Stand-alone inverter 13Figure 4.6: Hybrid inverter .13Figure4.7: GI mounting structure .15List of tablesTable 2.1 Generation license fee structure . 5Table 4.1 c-Si specifications 12Table 4.2 Module warranty .12Table 4.3 Placement of inverter .14Table 4.4 Reference wire gauge . . .17iv
NET METERING REFERENCE GUIDE1.IntroductionThis guide provides an overview of important points to consider when planning and purchasinga small, medium or even large PV system intended for own consumption and for gridinterconnection. The guide is directed towards the interested parties considering installing a gridconnected photovoltaic system. It attempts to walk the reader through different stages, beginningfrom the day when idea to buy a PV system is conceived, up to the realization of the PV project.This user guideline intends to give the reader a roadmap for installation and interconnection, inorder that all steps are covered and considered beforehand. The system can either be a residentialPV installation of a household or a larger commercial solar PV system.1.ABackgroundPakistan has been facing energy crisis for the past few years as the demand and supply gap haswidened. The country’s current energy demand far exceeds its generation resources, and it hasbeen facing an energy shortfall of 4000MW. As a result, load-shedding and power blackoutshave become severe issues.Keeping in mind the above issues, the Government of Pakistan is promoting investment in thegeneration of small scale distributed Renewable Energy, through the Alternative EnergyDevelopment Board (AEDB), on the basis of the Net-Metering concept.1.BAbout Net MeteringNet metering is an electricity policy for consumers, who own / plan to setup a Renewable Energyfacility, which allows them to produce electricity (using wind and solar) for their own use andsupply the excess produce to the national grid setting-off units of electricity consumed duringoff-peak hours or at times when the production from RE facility is not enough to meet theconsumer load. The consumer will either pay reduced utility bill or get paid for access energyexported to the grid, as stated in the contract with the relevant DISCO.NEPRA, in September 2015, issued its net-metering regulations that allow the DISCOs inPakistan to purchase excess units of electricity produced by the consumers, and net them offagainst the units consumed from t
The consumer will either pay reduced utility bill or get paid for access energy exported to the grid, as stated in the contract with the relevant DISCO. NEPRA, in September 2015, issued its net-metering regulations that allow the DISCOs in
