Quick answer: A factory battery energy storage system (BESS) in India costs about ₹25,000–32,000 per kWh for 500 kWh to 2 MWh, before 18% GST (indicative, November 2026). That puts a 500 kWh system at about ₹1.25–1.6 crore. In Gujarat it pays back mainly by cutting demand charges and diesel use. Peak-hour shifting alone saves too little.
Battery storage is the question we hear most from factory owners who already have solar. The panels are on the roof and the day-time bill is down, but the maximum demand charge hasn’t moved, the evening peak still costs extra, and the DG set still runs during cuts. Can a battery fix that?
Sometimes, yes. Often, not yet. This guide works through BESS for factories in Gujarat with real 2026 numbers: the GERC tariff, what batteries cost, a worked 1 MW solar plus 500 kWh example, and the new GERC battery rules. We’re ASV Energy Solutions, a solar EPC company in Koba, Gandhinagar. We build industrial solar plants and battery storage, and we’d rather tell you a battery won’t pay than sell you one that doesn’t.
What a battery does in a factory
A BESS is a bank of lithium iron phosphate (LFP) batteries with a power conversion system (PCS), a battery management system and an energy management controller, usually in a cabinet or container with its own cooling and fire protection. It’s rated two ways: power in kW (how fast it charges and discharges) and energy in kWh (how much it stores). A 250 kW / 500 kWh system can deliver 250 kW for two hours.
In a factory it can earn money in four ways:
- Peak shaving: it discharges when your load spikes, so the maximum demand on your bill comes down. Over time you can also lower your contract demand.
- Time-of-use shifting: it charges in the cheaper midday hours and discharges in the morning and evening peak.
- Storing solar: it soaks up solar output your load can’t use at that moment and gives it back after sunset.
- Backup: it carries critical loads through a power cut in milliseconds, so the DG set runs less or not at all.
One battery can do all four, but not all at once at full size. The trick is to size it for the job that pays most on your bill.
Gujarat’s 2026 tariff: where a battery can save
For HT factories on the four state DISCOMs (UGVCL, MGVCL, DGVCL and PGVCL), the GERC tariff schedule effective 1 April 2026 sets the HTP-I rate like this:
| HTP-I charge (FY 2026-27) | Rate |
|---|---|
| Demand charge, first 500 kVA | ₹150 per kVA a month |
| Demand charge, next 500 kVA | ₹260 per kVA a month |
| Demand charge, above 1,000 kVA | ₹475 per kVA a month |
| Excess demand (above contract demand) | ₹555 per kVA a month, on top of the demand charge |
| Energy charge | ₹4.00 (up to 500 kVA), ₹4.20 (500–2,500 kVA), ₹4.30 (above 2,500 kVA) per unit |
| Peak surcharge, 7–11 am and 6–10 pm | 45 paise per unit (up to 500 kVA billing demand), 85 paise (above 500 kVA) |
| Midday discount, 11 am–5 pm | 60 paise per unit |
| Billing demand | The highest of actual maximum demand, 85% of contract demand, or 100 kVA |
Three things stand out for a battery.
Demand charges are where the money is. For a factory above 1,000 kVA, every kVA cut from the top of your billing demand saves ₹475 a month, or ₹5,700 a year. Cut 250 kVA and that’s ₹14.25 lakh a year. But there’s a catch: billing demand can’t fall below 85% of your contract demand. So the saving only lands if you also lower the contract demand with your DISCOM once the battery has proved it can hold the peak down.
The peak-hour spread is thin. The gap between the midday discount and the peak surcharge is ₹1.45 a unit (60 + 85 paise). After battery losses, that’s not enough to pay for a battery by itself, as the example below shows.
Smaller units see smaller savings. Under 500 kVA, demand charges are ₹150 per kVA and the peak surcharge is 45 paise. For LTMD connections the demand charge tops out at ₹195 per kW. A battery is much harder to justify on these tariffs.
If you’re a Torrent Power customer in Ahmedabad, Gandhinagar or Surat, the windows differ: for FY 2026-27 GERC moved Torrent’s peak hours to 6–8 am and 5–11 pm and gave some HT categories a 30 paise solar-hours rebate from 11 am to 3 pm. Check your own bill and tariff category before running any numbers.
BESS cost in India in 2026
Battery prices have fallen fast, but factory-sized systems still cost far more per kWh than utility-scale ones. Installed prices for LFP systems, as reported by two Indian BESS suppliers in August and September 2026:
| System size | Installed cost per kWh (before GST) | Example |
|---|---|---|
| 100–500 kWh | ₹30,000 to ₹40,000 | 200 kWh: ₹60–80 lakh |
| 500 kWh–2 MWh | ₹25,000 to ₹32,000 | 500 kWh: ₹1.25–1.6 crore |
| 2–10 MWh | ₹20,000 to ₹28,000 | 4 MWh: ₹8–11.2 crore |
GST is 18%. Unlike solar panels and inverters, which moved to 5% in September 2025, batteries under HSN 8507 stay at 18%. The solar industry has asked for BESS to be cut to 5%, as Energetica India reported on 7 October 2026, but no change has been made so far. A GST-registered factory can usually claim input tax credit on the battery as a capital good, so the pre-GST price is the real cost. Confirm this with your CA.
Life. Good LFP systems come with warranties of around 10 years or 4,000–6,000 full cycles, whichever comes first. At one cycle a working day, 4,000 cycles is about 13 years. Ask for the warranty in both years and cycles, and for a guaranteed usable capacity at the end of it.
Worked example: 1 MW solar plus a 500 kWh battery
Take a GIDC unit on UGVCL with a 1,500 kVA contract demand, two shifts, a 1 MW rooftop solar plant already running, and short load peaks that push its maximum demand to about 1,450 kVA. It adds a 250 kW / 500 kWh battery. Assumptions:
| Assumption | Value |
|---|---|
| Battery | 250 kW / 500 kWh LFP, 90% round-trip efficiency |
| Cost | ₹28,000 per kWh = ₹1.40 crore before GST (₹1.65 crore with 18% GST) |
| Energy charge + FPPAS | ₹4.30 + ₹2.45 = ₹6.75 a unit |
| Cycles | One a day, 300 working days a year |
| Upkeep (AMC, monitoring, insurance) | 1.5% of cost = ₹2.1 lakh a year |
| Peak shaved | 250 kVA, with contract demand lowered to match |
Peak-hour shifting. Each day the battery takes in 500 units at midday, from the solar plant or the grid, worth ₹6.15 each after the 60 paise discount. It gives back 450 units in the peak window, worth ₹7.60 each with the 85 paise surcharge. That’s 450 × ₹7.60 − 500 × ₹6.15 = ₹345 a day, or about ₹1.04 lakh a year. Less than the upkeep.
Demand charges. Holding maximum demand 250 kVA lower saves 250 × ₹475 × 12 = ₹14.25 lakh a year. This is the line that carries the case.
| Scenario (₹1.40 crore battery) | Yearly net saving | Simple payback |
|---|---|---|
| A. Peak-hour shifting only (₹1.04 L − ₹2.1 L upkeep) | About −₹1.1 lakh | Never |
| B. A + 250 kVA demand cut (₹14.25 L) | About ₹13.2 lakh | About 10.6 years |
| C. B + no excess-demand penalty in 4 months a year (150 kVA × ₹1,030 × 4 = ₹6.2 L) | About ₹19.4 lakh | About 7.2 years |
| D. C + 20,000 diesel units replaced a year (× ₹22 saved = ₹4.4 L) | About ₹23.8 lakh | About 5.9 years |
The honest reading: in Gujarat a battery for peak-hour shifting alone loses money. A battery that cuts demand charges at the top slab pays back in about 10 years, which is close to its warranty. Add avoided excess-demand penalties and diesel, and it starts to look like a real investment at 6 to 7 years.
How payback moves with price and peak cut
| 500 kWh battery cost (before GST) | 150 kVA demand cut | 250 kVA demand cut |
|---|---|---|
| ₹25,000/kWh (₹1.25 crore) | About 16 years | About 9.3 years |
| ₹28,000/kWh (₹1.40 crore) | About 19 years | About 10.6 years |
| ₹32,000/kWh (₹1.60 crore) | About 22 years | About 12.4 years |
Battery prices are still falling. Each ₹3,000 per kWh off the price takes about a year off the payback at a 250 kVA cut. That’s why many factories install solar now and leave space, cable routes and a switchgear bay for a battery later.
When a battery pays in Gujarat, and when it doesn’t
A battery is worth a serious look if most of these are true:
- Your billing demand is above 1,000 kVA, so the top kVA costs ₹475 a month.
- Your peaks are short, an hour or two from a furnace, compressor bank or batch process, not a flat all-day load.
- You pay excess-demand charges in some months, or you’re about to raise your contract demand.
- You run a DG set regularly for cuts or voltage dips, or a short stoppage ruins a batch.
- Your solar plant makes more than you use at midday, for example on Sundays or during lunch breaks.
It’s probably not worth it yet if you’re an LT or small HT unit under 500 kVA, your load is flat across the day, your power supply is reliable, or the main goal is peak-hour shifting. In those cases, put the money into more solar first. Our guide to sizing factory solar from your electricity bill shows how to get the most from the roof, and our industrial solar cost per kW guide covers the price.
The new GERC battery storage rules
In October 2026 GERC notified the Grid Interactive Battery Energy Storage System Regulations, 2026 (Mercom, 22 October 2026). Most of the rules deal with grid-scale projects, but a few matter for factories:
- Consumers and prosumers, including those on net metering, can install a battery behind their meter.
- A grid-connected battery has to be registered with GEDA, and the DISCOM’s prior permission is needed before commissioning. GEDA is due to publish its registration procedure within three months of the notification.
- The battery must meet Central Electricity Authority technical and connectivity standards.
- The 1 MW / two-hour minimum size applies to standalone grid projects, not to batteries behind a consumer’s meter.
- Separately, GERC’s new 2026 net metering rules make a battery compulsory in one case: if your contract demand is above 100 kW and you install solar beyond your sanctioned demand, the battery must cover at least 50% of the extra capacity with two hours of storage. Our net metering guide for Gujarat explains this and the 30% set-off cap for factories.
This follows the same lesson as rooftop solar: don’t switch anything on before the approvals are in place. In September 2026 GERC upheld a bill against a Gujarat cold storage unit that ran an extra solar inverter beyond its approved capacity. Your EPC should handle GEDA registration, DISCOM permission and the CEI drawings as part of the job.
What to ask before you buy a factory battery
- Load data first. Get 15-minute or 30-minute load data from your meter or energy monitor for at least a month. Sizing a peak-shaving battery from monthly bills alone is guesswork.
- kW and kWh separately. Peak shaving needs power (kW); backup and solar storage need energy (kWh). Ask why the proposed ratio fits your load.
- Cell chemistry and make. LFP, with the cell maker named, not just the integrator.
- Warranty terms. Years and cycles, usable capacity guaranteed at the end, and round-trip efficiency at commissioning.
- Safety. Fire detection and suppression, ventilation or liquid cooling, and where the container sits relative to your plant and stores.
- Controls. How the energy management system decides when to charge and discharge, and whether it can follow your ToD windows and demand limit automatically.
- Approvals and GST. Who files GEDA registration and DISCOM permission, and whether the price shown is with or without 18% GST.
Solar and battery storage from ASV
ASV has built 90 MW+ of solar across Gujarat, Maharashtra and Madhya Pradesh, from factory rooftops to ground-mount plants, and we have a 700 kW battery storage project under way. When a factory asks us about storage, we start with its load data and bill, run the scenarios above with its own numbers, and say plainly if more solar is the better buy. See our commercial and industrial solar work and projects, or compare plant sizes in our 1 MW solar plant cost guide and 100 kW solar plant cost guide.
Frequently asked questions
What is the cost of a BESS in India in 2026?
For factory-sized LFP systems, about ₹30,000–40,000 per kWh for 100–500 kWh and ₹25,000–32,000 per kWh for 500 kWh to 2 MWh, installed, before 18% GST (indicative, November 2026). A 500 kWh system costs about ₹1.25–1.6 crore before GST.
What is the GST on battery energy storage systems?
18%. Lithium-ion batteries under HSN 8507 were not included in the September 2025 cut to 5% for solar devices. The industry has asked for a cut, but none has been made as of November 2026. A GST-registered factory can usually claim input tax credit; confirm with your CA.
Does a battery pay back for a factory in Gujarat?
Only in the right conditions. Peak-hour shifting alone saves less than the upkeep, because the GERC midday discount and peak surcharge add up to just ₹1.45 a unit. Cutting 250 kVA of demand above 1,000 kVA gives a payback of about 10 years, and adding avoided excess-demand penalties and diesel can bring it to 6–7 years.
What are the peak hours for industrial consumers in Gujarat?
For HT consumers of UGVCL, MGVCL, DGVCL and PGVCL in FY 2026-27, peak hours are 7–11 am and 6–10 pm, with a surcharge of 45 or 85 paise a unit depending on billing demand. Units used from 11 am to 5 pm get a 60 paise discount. Torrent Power’s peak hours are 6–8 am and 5–11 pm.
How does a battery reduce demand charges?
It discharges when your load spikes, so the maximum demand recorded on your meter stays lower. Because billing demand cannot fall below 85% of contract demand, you also need to lower your contract demand with the DISCOM to bank the full saving.
What size battery does a factory need?
It depends on the job. For peak shaving, size the kW to the peak you want to cut and the kWh to how long the peak lasts, often 1–2 hours. For backup, size it to your critical load and the length of a typical cut. Use 15- or 30-minute load data, not monthly bills.
Can I add a battery to my existing rooftop solar plant?
Yes. A battery can be added to an existing plant, usually on the AC side through its own PCS. Under the GERC battery regulations of October 2026, you need GEDA registration and the DISCOM’s prior permission before commissioning.
How long does a BESS last?
Good LFP systems carry warranties of about 10 years or 4,000–6,000 full cycles. At one cycle a working day, 4,000 cycles lasts about 13 years. Ask for the guaranteed usable capacity at the end of the warranty.
Is there a subsidy for factory battery storage in Gujarat?
We have not found a capital subsidy for behind-the-meter factory batteries in Gujarat as of November 2026. Central viability gap funding schemes are for grid-scale projects, not individual factories.
Should I buy more solar or a battery first?
For most factories, more solar first. Solar pays back in about 4 years in Gujarat, while a battery takes 6–11 years. Install solar now and plan space, cable routes and a switchgear bay so a battery can be added when prices fall.
Sources
- GERC, Tariff schedule of DGVCL, MGVCL, PGVCL and UGVCL, effective 1 April 2026 (HTP-I, LTMD).
- DeshGujarat, GERC unveils FY 2026-27 power tariff in Gujarat (25 March 2026).
- Mercom India, Gujarat regulator notifies battery energy storage regulations (22 October 2026).
- Reslink, Gujarat BESS regulations 2026: what the final rules say (October 2026).
- Energetica India, RE industry seeks GST cuts for BESS, EPC services (7 October 2026).
- DC&T Global, BESS in India: a 2026 C&I buyer’s guide (5 August 2026).
- Zetwerk, BESS cost in India 2026 (23 September 2026).
- Business Today, Diesel price in Ahmedabad (2 November 2026).
Find out if a battery pays for your factory
Send us your last 12 electricity bills and, if you have it, a month of load data. We’ll tell you how much a battery could cut from your demand charges, whether more solar is the better buy, and what the payback looks like with your own tariff. Call or WhatsApp +91 96626 63069.
