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Mandating storage for rooftop solar may backfire without clarity

Solar's daytime-only output is well-known, and using storage to get power during other periods, especially the evening peak, seems like an obvious solution

The green energy arm of India’s largest power generator, NTPC, has said in its DRHP filing that the government’s restrictions on trade ties with China will adversely impact its business, given that the neighbouring country is a leader in solar and wi
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Sharath RaoRahul Tongia

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Rooftop solar (RTS) has gained significant momentum in India following the launch of the PM Surya Ghar Muft Bijli Yojana (PM Yojana). Before the scheme, cumulative RTS installations stood at 11.07 GW, but in the past year alone, 5.21 GW has been added, predominantly in the residential sector.
 
However, as solar penetration increases, concerns about grid stability, reliability, intermittency, and local over-injection are growing. In response, the Ministry of Power issued an advisory urging distribution companies (discoms) to consider mandating two-hour storage with RTS. Although later clarified by the Central Electricity Authority (CEA) as “guidance”, this could become a mandatory
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