Most people who ask for a hybrid system are describing a problem that an on-grid system already solves. They want a lower bill. Hybrid does not deliver a lower bill than on-grid — it delivers the same bill with backup attached, at roughly Rs 1.1 lakh more.
That is the whole article in two sentences. The rest is the working, because the three options differ on four things that matter and nobody lays them side by side.
What the three actually are
On-grid
Panels, an inverter, and a connection to the DISCOM. No battery. Surplus goes out to the grid, shortfall comes in from it. The grid is doing the storage for you.
Hybrid
The same thing plus a battery and a hybrid inverter. Still grid connected, still exporting surplus, but with a reserve that keeps selected circuits alive during a cut.
Off-grid
No DISCOM connection at all. Panels, a charge controller, a battery bank sized for your worst stretch of bad weather, and an inverter. Everything you use has to come through the battery.
Cost per kW, before subsidy
These are the benchmark bands this site's calculators use:
| System type | Installed cost per kW |
|---|---|
| On-grid (no battery) | Rs 55,000 – 75,000 |
| Hybrid (with battery) | Rs 85,000 – 1,15,000 |
| Off-grid | Rs 95,000 – 1,25,000 |
The gap between the first row and the other two is the battery, the heavier inverter and, for off-grid, a battery bank sized for several days rather than one evening.
The same 3 kW system, three ways
Same panels, same roof, same sunshine. 3 kW in a region with 5.0 peak sun hours, generating about 4,200 units in year one, at a Rs 8 average tariff. Mid-range quotes in each case.
| On-grid | Hybrid | Off-grid | |
|---|---|---|---|
| System cost | Rs 1,75,000 | Rs 2,85,000 | Rs 3,15,000 |
| Central subsidy | – Rs 78,000 | – Rs 78,000 | nil |
| Net cost | Rs 97,000 | Rs 2,07,000 | Rs 3,15,000 |
| Units generated, year one | 4,200 | 4,200 | 4,200 |
| Units you can actually value | 4,200 | 4,200 | ~3,200 |
| Year-one saving at Rs 8 | Rs 33,600 | Rs 33,600 | Rs 25,600 |
| Net cost / year-one saving | 2.9 years | 6.2 years | 12.3 years |
Redo the last row yourself — it is one division:
Two things to notice. The hybrid generates exactly the same units as the on-grid system — the battery stores, it does not produce — so the whole of the extra Rs 1,10,000 buys availability rather than output. And the off-grid system has to discard surplus it cannot store, because there is no grid to send it to, so it values fewer of the units it makes.
What happens in a power cut
This is the only place the three genuinely differ in daily life.
| During a cut | Why | |
|---|---|---|
| On-grid | Everything goes off, including the solar | Anti-islanding: the inverter must disconnect so it cannot feed a dead line |
| Hybrid | Backed-up circuits stay on | The battery supplies them while the inverter isolates from the grid |
| Off-grid | Unaffected — there is no grid to lose | You were never connected |
The first row surprises almost everybody. A sunny afternoon, working panels, and no power in the house. It is a safety requirement, not a fault, and it is the single most common complaint from new on-grid owners.
It is also worth keeping in proportion. If your supply is reliable, the cost of that inconvenience is a few hours a year. If it is not, you have a real problem, and the battery guide works through how to size a solution to it rather than to the whole house.
Subsidy eligibility
| Central subsidy on 3 kW | What it is paid on | |
|---|---|---|
| On-grid | Rs 78,000 | The solar capacity |
| Hybrid | Rs 78,000 | The solar capacity only — not the battery |
| Off-grid | Treat as nil | No DISCOM connection, no net meter |
The middle row is the one that gets misrepresented. A hybrid system earns the same Rs 78,000 as a plain on-grid one, because the subsidy is paid on the solar slabs — Rs 30,000 per kW for the first 2 kW and Rs 18,000 for the third. The battery is entirely yours.
The bottom row follows from the process rather than from a rule about batteries: the application runs through DISCOM feasibility approval and ends with a net meter, and an off-grid system has neither. If you are seriously considering off-grid, confirm the current position on the official PM Surya Ghar portal rather than assuming either way.
Maintenance over 25 years
This is where the hybrid and off-grid cases get worse than the quotation suggests, because the battery is not a one-time purchase.
| Battery type | Realistic life | Replacements in 25 years |
|---|---|---|
| Flat plate lead-acid | 2 – 3 years | 8 or more |
| Tubular lead-acid | 4 – 6 years | 4 – 5 |
| Lithium (LFP) | 8 – 12 years | 1 – 2 |
Put a rupee figure on the best case:
So the honest hybrid figure is not Rs 1,10,000 more than on-grid. It is Rs 1,10,000 now and roughly Rs 2,20,000 again across the next two decades, before you account for prices changing. On tubular lead-acid the replacement count is four or five rather than two.
Everything else is the same across all three:
- Cleaning. Identical. Dust does not care what is behind the panels.
- Inverter. One replacement between years 10 and 15 in every case. A hybrid inverter costs more to replace than an on-grid one.
- Battery siting. Hybrid and off-grid need a shaded, ventilated spot. Indian summers shorten battery life more than the datasheet admits.
Match the system to the actual problem
| Your actual problem | What to buy |
|---|---|
| My bill is too high and supply is fine | On-grid. Nothing else is competitive. |
| Long or frequent cuts, and something must stay on | Hybrid, sized to essential circuits only |
| Occasional short cuts, and I already have an inverter battery | On-grid, keep the existing inverter for backup |
| My state does gross metering | Run the numbers — storing your own units has real value there |
| There is no grid, or extending it costs lakhs | Off-grid. This is what it is for. |
| I want to be independent of the DISCOM on principle | Off-grid, with your eyes open about the cost |
Note the third row. A plain inverter and battery costs a fraction of a hybrid upgrade and solves the same availability problem. It charges from the grid rather than from your panels, which matters less than it sounds, because the grid is available most of the time by definition.
The decision you cannot defer
That middle path costs more than a plain on-grid inverter and less than a full hybrid system, and it keeps the option open. It is the right answer for people whose supply is adequate today but who are not confident about three years from now.
Where the metering regime changes the answer
Under net metering the grid banks your surplus at full retail value, which makes a battery almost pointless financially — you already have free storage. Under net billing your surplus is bought at a lower rate, so storing a unit instead of exporting it is worth the difference. Under gross metering, storage has the most value of the three.
This is a state-level policy question, not an equipment question, and it changes the recommendation more than the hardware does. The metering guide sets out which regime does what, and the battery calculator will size a bank for the load you actually need to keep alive and show the cost per cycle rather than the sticker price.
Questions people ask
Is hybrid not just the safest choice?
It is the most expensive choice, which is not the same thing. It is the right choice when the battery is solving a problem you actually have. Buying one against a problem you might have is how people end up with a Rs 1.1 lakh component they use twice a year.
Does a hybrid system save more than an on-grid one?
Under net metering, essentially no. The grid already stores your surplus at full value, so the battery has nothing left to earn. Under net billing or gross metering it earns the gap between what you are paid for a unit and what you pay for one.
Can an off-grid system run an air conditioner?
Only with a battery bank and inverter sized for it, which is where off-grid costs stop being comparable to anything else. An AC on battery is several times the load of lights, fans and a fridge together.
Is off-grid ever the cheaper option?
Yes — when there is no connection and getting one means paying for poles and a line. Then the comparison is against the cost of extending the grid, not against your electricity bill, and off-grid often wins easily.
My installer says hybrid is "future ready". Is that a reason?
Partly. A hybrid inverter genuinely does keep the storage option open, and that has value. A full battery bank bought today because you may want one later does not. Separate the two: the inverter choice is the future-proofing, the battery is the purchase.
What size battery should I start with?
Whatever keeps your essential circuit running for the length of a normal cut in your area — lights, fans, fridge, routers, phone charging. That is usually 3 to 5 kWh. Whole-house backup including air conditioning is a different order of cost and almost nobody needs it.