Hybrid solar systems with battery backup
Solar that cuts your bill and keeps the lights on when PSPCL supply goes off. It is worth it when power cuts really cost you something, and more than you need when they don't.
Updated 11 September 2026
How a hybrid system works
A hybrid system has panels, a hybrid inverter, a battery bank and a connection to PSPCL. During the day, solar runs your home and charges the batteries. If the grid fails, the inverter switches your backed-up circuits over to the batteries, and when the sun is down and the batteries are low, the grid takes over.
UTL’s hybrid inverters let you set the priority. The Heliac range, for example, can run in a PCU mode (solar, then battery, then grid) or a smart mode (solar, then grid, then battery), so you decide whether the batteries earn daily savings or stay full for cuts.
Hybrid systems we install
We install hybrid systems from 1 kW upwards.
| Kit | Inverter | Panels | Batteries | Average generation |
|---|---|---|---|---|
| 1kW/24V Hybrid Solar System | Gamma Plus 112 | 335Watt x 3No’s | UST1560 x 1nos | 4 units per day |
| 2kW/48V Hybrid Solar System | Sigma248 | 335Watt x 6No’s | UST1560 x 4no | 8 units per day |
| 3kW/48V Hybrid Solar System | Sigma348 | 335Watt x 9No’s | UST1560 x 4no | 12 units per day |
| 5kW/96V Hybrid Solar System | Sigma596 | 335Watt x 16No’s | UST1560 x 8no | 20 units per day |
The generation figures are UTL’s own. Our calculator uses a more conservative 102 units per kW a month.
When a hybrid system is worth it
- Power cuts cost you money. Think of a clinic, a home office, a shop that stops trading, or someone at home who relies on medical equipment.
- You want a lower bill as well. A hybrid system still generates your daytime power.
- You are prepared to pay more than for on-grid. Batteries add cost upfront and again when they need replacing. The PM Surya Ghar subsidy still applies, up to ₹78,000 for a home, but it does not cover the battery.
If power cuts are only an occasional nuisance, an on-grid system with the subsidy plus a small inverter-battery for the essentials is often cheaper. We will tell you which way the numbers fall for your connection.
What a hybrid system costs
These prices are for the lithium hybrid kits we install most often. Each includes panels, hybrid inverter, 51.2V/100Ah lithium battery, mounting structure, DC and AC wiring, earthing, ACDB+DCDB, lightning arrester, cable tray, changeover switch, labour and net metering:
| System | Installed price | PM Surya Ghar subsidy | Your cost after subsidy |
|---|---|---|---|
| 3 kW hybrid | ₹2,78,000 to 3,06,000 | − ₹78,000 | ₹2,00,000 to 2,28,000 |
| 5 kW hybrid | ₹3,58,000 to 3,94,000 | − ₹78,000 | ₹2,80,000 to 3,16,000 |
| 6 kW hybrid | ₹3,88,000 to 4,27,000 | − ₹78,000 | ₹3,10,000 to 3,49,000 |
Each range starts at our own itemised quote for that kit and runs up to 10% higher, to allow for the roof, structure and cable runs. You pay the full amount first, and the subsidy reaches your bank account 30 to 45 days after the DISCOM inspection.
Backup is sized to the loads you choose
Batteries big enough to run air conditioners through a long cut would be very large and expensive, so most hybrid systems back up a chosen set of circuits. Before we quote, we ask what must stay on during a cut and for how long, and size the battery bank to that. You can try it yourself in the hybrid solar calculator, which gives the inverter, batteries, panels and roof area for the appliances you pick.
Questions we are asked
How long will the batteries run my house?
That depends on what you run during a cut and the size of the battery bank. A hybrid system is normally set up to back up chosen loads, such as lights, fans, the fridge, Wi-Fi and a computer; air conditioners usually aren't on that list. Tell us what must stay on and for how long, and we will size the batteries to match.
Does a hybrid system get the PM Surya Ghar subsidy?
Yes. The subsidy is for grid-connected, net-metered systems. RSK Solar Energy's hybrid systems are grid-tied with a battery added and stay connected to PSPCL, so they qualify just as on-grid systems do, up to ₹78,000 for a home. Off-grid systems don't qualify, because they have no grid connection at all.
How often do the batteries need replacing?
Batteries wear out long before panels do. UTL lists warranties on its batteries; for example, the tubular batteries in the 3 kW kit carry a 5-year warranty in UTL’s listing. Plan for at least one battery replacement over the life of the panels.
Can I add batteries to my on-grid system later?
Only if the inverter supports it. A standard on-grid inverter can't run batteries, so you would need a hybrid inverter. If you think you will want backup later, tell us before you buy.