Solar Energy Banking Rules by State: What Happens to Units You Don't Use

Banked solar units are credits carried forward against later consumption, not cash. Each state sets the window and the end-of-period treatment. Punjab runs a 1 October to 30 September settlement period. Maharashtra settles at financial year-end and buys leftover units at the generic tariff. Madhya Pradesh pays by 15 November at a bid-discovered rate. Gujarat's original rules allowed banking only within one billing cycle.

What does banking mean in net metering?

A net-metered plant feeds the factory first and exports the rest. If exports exceed imports in a billing period, the excess is carried forward as credited units. If imports exceed exports, the DISCOM bills the difference after adjusting any credit. Where the consumer is on a Time of Day tariff, the regulations we read set consumption in each time block against generation in the same block first, and treat any remaining export as if it fell in the off-peak or next-lower tariff block. Banking decides how long that credit lives. It ends at the settlement period, when the carried-forward quantity is reset to zero and the leftover is paid for, or not, as the state says.

What do the regulations say, state by state?

The table gives the position in the regulation text we read for each state. Rules have been amended since several of these were first notified, and we say where.

We have not read the current regulations for Haryana, Uttar Pradesh, Rajasthan, Karnataka, Tamil Nadu and other states for this article, so we do not state their terms. For each, ask the DISCOM for the regulation in force on your application date and read the sections on settlement period, leftover units and charges.

Has any state withdrawn banking for industrial consumers?

We could not confirm a full withdrawal from the primary texts. What the documents show is pressure to reduce banking. In its 2023 statement of reasons, MERC records that Maharashtra's state DISCOM asked it to withdraw the monthly banking facility, and the Commission refused, saying banking cannot be withdrawn because it is essential and is allowed under the Ministry of Power's rules and the Forum of Regulators' model regulations. It also decided that licensees may petition for banking charges while grid support charges stay deferred. MERC has since put a draft of revised rooftop rules out for comment in 2026, which we have not read at source and which is not notified; check merc.gov.in before sizing in Maharashtra. Gujarat's 2016 regulation, for its part, confines industrial and commercial banking to one billing cycle.

How does banking change the plant size?

1. Treat export as a bonus, not a business. Where leftover units earn a low rate or nothing, every unit consumed on site is worth more than every unit exported.
2. Test the year, not the month. Build a table of monthly generation and monthly import for the settlement period. If generation exceeds consumption over the whole period, the surplus is settled at the end at the state's rate, and may lapse.
3. Look at the quiet months. A seasonal factory exports in its closed months and imports in its busy ones. A window that resets each billing cycle wastes the closed-month credit. A window that runs a year lets it be used.
4. Check the cap. Punjab's original 90% limit, and sanctioned-load limits elsewhere, can cap the size before banking matters.

An illustration with round numbers, not a forecast: a plant that exports 5,000 units in a closed month and sees the factory import 40,000 units next month recovers the credit immediately under a year-long window. Under a one-billing-cycle window the 5,000 units may be bought at the lower surplus rate instead. The sanctioned-load limit comes first, so check it with the sanctioned load calculator, then model your own months in the net-metering savings calculator.

Open access and captive plants are different

Banking under open access is settled by time block under the state's open-access regulations and carries its own charges. The Green Energy Open Access Rules, 2022 reduced the open-access limit for green energy from 1 MW to 100 kW and set out transmission, wheeling, cross-subsidy and standby charges, with the additional surcharge removed, according to the Ministry of Power's release. Madhya Pradesh lists a separate regulation on open access charges and banking charges for green energy consumers. Our guide to open-access solar explains how those routes differ from rooftop net metering.

How Secured Engineers helps

We design solar in-house and file the DISCOM net-metering application and, where needed, the CEIG file in-house, so the size we propose is tested against your state's settlement rule before it reaches a quotation. MEPF and solar can sit under one contract. We work from offices in Noida (Delhi NCR) and Ludhiana, with 535+ projects across 18+ states and 89.77% repeat clients. For states where this site does not record delivered work, we mobilise from Noida and Ludhiana.

If you tell us your state, your sanctioned load and twelve months of bills, we will say which window applies and how much plant the load can use. See our solar EPC page for the published C&I band of ₹24,000–32,000 per kW excluding GST, message us on WhatsApp, call +91 70099 85817, or ask for a free proposal.