What the solar half costs
Start with the array, because for most sites it is the bulk of the value and the fastest payback. Installed commercial rooftop solar in India in 2026 generally runs about ₹35–50 per watt-peak (Wp) — the standard way solar capacity is priced — with larger systems landing at the lower end because fixed costs spread over more kilowatts.
| System size | Indicative installed cost | Typical use |
|---|---|---|
| 100 kW | ₹40–50 lakh | Small factory, showroom, clinic |
| 500 kW | ₹1.8–2.2 crore | Mid-size plant, mall, office block |
| 1 MW | ₹3.5–4.2 crore | Large factory, logistics park |
Against commercial tariffs, that capital comes back quickly. Industry guides put the payback for commercial and industrial (C&I) rooftop solar at roughly three to five years, and as short as about 2.5 years where tariffs sit at the top of the range, followed by 20-plus years of largely free generation — a 15–20% return over the asset’s life.
What the battery adds — and costs
A battery is priced separately, per kilowatt-hour (kWh) of storage, and turnkey battery-system prices have fallen sharply — global turnkey costs dropped by roughly 40% in 2024 — which has pulled Indian project costs down with them. Lithium iron phosphate (LFP) is the near-universal choice for commercial storage because it is the safest and most cost-stable lithium chemistry, with a long cycle life.
The battery does not simply speed up the solar payback — it earns its own, separate returns by stacking four value streams on one asset:
- Evening arbitrage. Under Time-of-Day (ToD) tariffs — mandatory for C&I consumers with maximum demand of 10 kW and above since April 2024, with peak rates at least 1.2 times normal — a battery charged on cheap midday solar and discharged into the pricey evening captures that spread every cycle.
- Demand-charge savings. Discharging during your busiest moments shaves the peak-kVA charge that forms a big slice of many C&I bills. We cover this in demand charges explained.
- Outage backup. A grid-tied solar system shuts down in a cut; a battery keeps critical loads live.
- Higher self-consumption. Where exports are credited cheaply, storing surplus for your own use beats selling it back at a low feed-in rate.
How much storage is worth buying
Bigger is not better with batteries — an oversized pack sits idle and drags out the payback. Size the battery to the evening energy you actually shift, the peak you want to shave and any critical backup load. Our guide on how to size a BESS for your site works through the method, and BESS prices in India sets out current per-kWh ranges so you can budget the storage half separately from the solar. Whether a battery clears the bar at all is the subject of is adding a battery to commercial solar worth it.
For a smaller premises the same logic scales down — see solar and storage for shops and small businesses. The typical hardware is a right-sized outdoor cabinet such as the ADESS 250 for compact sites or the ADESS 1000 for larger plants, deployed as a solar-plus-storage system or configured for peak shaving.
What this means for you
Budget the two halves separately: solar at roughly ₹35–50 per watt with a three-to-five-year payback, and a battery priced per kWh that earns back through evening arbitrage, demand-charge savings, backup and self-consumption. If your grid is reliable and your evenings light, solar alone is the sharper buy. If your evening tariff is steep, your demand charges bite or outages cost you, storage pays. To size and cost both halves against your own bill, try our BESS savings calculator.
Snapshot as of July 2026. Solar and battery prices, tariffs, demand charges and depreciation rules vary by state, DISCOM and vendor and change over time — treat the figures here as indicative and get a site-specific quote before deciding.