Net Metering & DISCOMs

DISCOM-specific net metering guides for India and tariff/interconnection guidance for major US utilities.

Net Metering Hub 13 articles · 55 glossary terms

Net metering policy is where solar economics actually get decided. Two identical 1 MWp systems can have radically different payback periods because of NEM 3.0 in California, gross metering caps in Karnataka, or banking restrictions in Maharashtra. This hub maps the live net metering landscape DISCOM by DISCOM and state by state — application paperwork, tariff math, timelines, and the rejection reasons we see most often. Cross-reference with the permit hub for the engineering submission package and the finance hub for the resulting cashflow model.

How-To Guides

11 articles in this section.

Frequently asked questions

Quick answers to the questions we hear most about net metering & discoms.

What is the difference between net metering and gross metering?
Net metering credits exported energy against imported energy at retail tariff, often resulting in a small monthly bill. Gross metering buys all exported energy at a fixed feed-in tariff (often lower than retail), which changes the optimal system sizing.
How long does DISCOM approval take in India?
Karnataka (BESCOM): 6–10 weeks for commercial systems. Maharashtra (MSEDCL): 8–12 weeks with the harmonic study requirement. Gujarat: 4–8 weeks. Tamil Nadu (TANGEDCO): variable, often 10+ weeks for HT consumers.
What changed under NEM 3.0 in California?
Net billing replaced net metering for new installs post April 2023. Export credits drop to roughly 25% of retail rate, which makes battery pairing economically necessary for residential systems and changes optimal sizing for C&I.