What GNA is, in plain terms
To sell power across state boundaries in India, a project needs the right to use the national grid — the ISTS (inter-state transmission system). For years that right was granted point-to-point: you applied to move a fixed quantity of power from a specific injection point to a specific drawal point, and the paperwork was tied to that route.
General Network Access (GNA) replaced that with something simpler. Under the CERC (Central Electricity Regulatory Commission) Connectivity and GNA Regulations, a generator or storage project gets a single, standardised, non-discriminatory right to inject a certain quantum of power into the grid and draw it from anywhere, without being locked to one destination. Think of the older system as a named seat on one train, and GNA as a travel pass valid across the whole network. For a storage developer who may not know today exactly which buyer or which state will take the power in five years, that flexibility is worth a lot.
Why storage needed its own treatment
GNA was written mainly with conventional generators and solar/wind plants in mind — machines that push power out. A battery is different: it draws power in to charge, then pushes it back out to discharge, and it does both at different times of day. The early rules did not fit that two-way, time-shifted behaviour cleanly, and the bank guarantees and compliance built for large generators were heavy for a storage asset.
CERC has been steadily amending the framework to fix this. The changes that matter most to storage developers cluster around three things: cheaper entry, more flexible access, and safer exits.
Cheaper entry: the bank-guarantee cut
To hold a connectivity grant, developers must post a bank guarantee (BG) — money the grid keeps as security that you will actually build. For large generators this runs to lakhs per MW and ties up serious capital. CERC has proposed cutting the connectivity BG for energy storage systems to ₹5 lakh per MW (excluding pumped-storage plants, which are treated separately — see pumped hydro vs BESS). For a mid-sized battery project, a lower BG frees up capital and lowers the cost of simply getting in the queue.
There is a technical string attached: to qualify for this storage-friendly treatment, a battery is generally expected to offer a minimum discharge capacity of at least twice its connectivity quantum in energy terms — in plain terms, roughly a two-hour or longer battery, not a thin sliver of power with no duration behind it. That aligns with how tenders already specify duration, which we cover in 2-hour vs 4-hour BESS.
Flexible access: restricted and non-solar-hour rights
The other big shift is recognising that storage and renewables do not use the grid around the clock. Recent amendments introduce the idea of entities with restricted access — projects that inject only during certain windows, such as solar hours or non-solar hours — and let developers request access specifically for the period they actually need. A battery built to firm up evening supply can seek non-solar-hour access rather than paying for full-day, full-capacity rights it will never use. This dovetails with firming-focused business models such as renewable firming and round-the-clock supply.
Two further reliefs help storage specifically:
- Charging-linked renewables made simpler. A developer can install renewable generation purely to charge the battery without having to file separate land documents or financial-closure proof for that charging capacity — cutting duplicate paperwork for co-located solar or wind.
- Safer exits. If the grid’s final connectivity date slips more than two years beyond the originally indicated start, the developer can withdraw the full quantum and get the bank guarantee refunded — protection against being trapped by transmission delays outside their control.
CERC has also eased implementation timelines, allowing eligible entities a fresh source change and a one-time extension of a couple of months to adjust to the new regime.
GNA is not the whole picture
Connectivity is one layer of the economics, not all of it. GNA gets your power onto the grid; what it costs to move that power across states is governed separately by transmission charges and the ISTS charge waiver. And winning the offtake in the first place runs through the tender process — see how to bid for a BESS tender. Read GNA alongside those to see the full path from a project idea to delivered, paid-for power.
What this means for you
- Developers: the lower ₹5 lakh/MW bank guarantee and restricted-access options genuinely reduce the capital and rigidity of getting connected — but they come with conditions (minimum duration, charging arrangements), so design the project to qualify from day one rather than retrofitting later.
- DISCOMs and buyers: easier storage connectivity means a deeper pool of biddable projects, which should sharpen tender pricing over time.
- Anyone planning a project: map your connectivity, charging source and offtake window together — the new flexibility only pays off if the pieces are designed to fit.
Grid rules in India change by notification, and the exact bank-guarantee figures, access categories and deadlines are periodically amended by CERC — always verify the current provisions before you file a connectivity application or commit to a bid. If you want help mapping connectivity and duration to a specific site, talk to our team and we will walk you through it.
Policy snapshot as of July 2026. Terms change by notification; verify current CERC provisions before financial decisions.