Where does your extra solar go? Carried-forward credit explained

How credit builds up

In months when you export more than you import (often March to May in Hyderabad), the surplus isn't lost: it's credited to your account as units and carried forward to later bills, where it reduces the units you're billed for.

How it's settled

Credit that isn't used up is eventually settled, meaning paid out rather than carried forward for ever. TGSPDCL's net-metering FAQ describes unadjusted credit being settled twice a year, in June and December, at the average power purchase rate.

Telangana's new rooftop solar regulation, in force since 15 November 2025, says surplus power is settled at the lowest solar tariff of the previous financial year.

The rules are in transition. Check your bill for a settlement line in the months it's due, and ask us if an amount looks wrong or never arrives.

What commonly goes wrong

• Credit resets to zero with no settlement shown.
• The opening credit on a bill doesn't match the closing credit on the one before.
• Credit isn't used against a month where you imported more than you exported.
• Settlement is shown but the amount never reaches your account.

How to check it yourself

1. Line up your billsPut the last few bills in order, oldest first.
2. Follow the creditEach bill's closing carried-forward units should be the next bill's opening units.
3. Check the mathsOpening + added − used should equal closing on each bill.
4. Note the gapsAny mismatch, with the bill months and units, is exactly what to put in a complaint.