Tamil Nadu aims for 10 GW battery storage by 2029 under its new BESS policy, requiring solar plants above 1 MW to install storage of at least 10% capacity. Policy offers exemption from transmission and wheeling charges up to 10 years, but experts say benefit is too small. Industries flag that stored energy cannot be used for captive consumption and must be sold to TNPDCL at 75% value, with pricing by TNERC.
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