The biggest decision when going solar isn't which brand of panel to buy — it's which type of system to install. On-grid, off-grid, and hybrid systems each work very differently and suit very different situations. Here's everything you need to know to choose the right one.
On-Grid
Connected to the utility grid. Exports surplus power and earns credits. Shuts down during power cuts for safety.
Off-Grid
Completely independent from the grid. Requires battery storage to power the home at night or on cloudy days.
Hybrid
Connected to the grid AND has battery storage. Powers home during cuts, exports surplus, maximum flexibility.
On-Grid Systems: The Most Common Choice
An on-grid (or grid-tied) solar system is connected to your local electricity grid via a bidirectional meter. During the day, your panels generate electricity that powers your home first. Any surplus is exported to the grid and credited to your electricity bill — this is called net metering.
How it works
- Solar panels → String inverter → Your home's DB (distribution board)
- Surplus power flows back through the meter to the grid
- At night or on cloudy days, you draw from the grid as normal
- Your monthly bill is: Grid units consumed minus solar units exported
The key limitation
On-grid systems have a critical safety feature: they automatically shut down during a power cut. This is required by regulation to prevent your inverter from back-feeding live current into grid lines where technicians may be working. It means you have no power during outages — even when the sun is shining.
Homes and businesses in areas with reliable grid supply (fewer than 2–3 cuts per month), and anyone prioritising lowest upfront cost and fastest payback. The most popular choice in Bangalore's well-supplied layouts.
Off-Grid Systems: Complete Independence
An off-grid system has no connection to the electricity grid. It relies entirely on solar panels to charge a battery bank, which then powers your home 24 hours a day. These systems must be sized very carefully — the battery bank must be large enough to carry the home through multiple cloudy days without sunlight.
When off-grid makes sense
- Remote locations where grid connection would cost ₹3–10 lakh in extension charges
- Farm houses, rural properties, or islands with no utility supply
- Situations where the grid is completely unreliable (12+ hours of daily cuts)
The main drawback is cost. A true off-grid system requires 2–3× more battery capacity than a hybrid system, significantly raising the upfront investment. Battery replacement every 8–12 years also adds to the long-term cost.
Remote properties with no grid access or extremely unreliable supply. Agricultural pump houses, rural homesteads, and sites where the cost of grid extension exceeds the cost of a standalone solar system.
Hybrid Systems: The Best of Both Worlds
A hybrid system combines the best features of both on-grid and off-grid. It is connected to the grid (enabling net metering and grid backup) but also has battery storage (enabling power during outages). A hybrid inverter intelligently manages all three power sources — solar, battery, and grid — in real time.
How hybrid inverters manage power
- Solar panels charge the battery and power the home simultaneously
- When the battery is full, surplus exports to the grid
- During a power cut, the system islands — battery + solar power your home seamlessly
- At night, battery discharges first; grid makes up any shortfall
Homes and businesses in areas with frequent but not constant power cuts (1–6 hours per day). The fastest-growing segment in Bangalore as battery prices continue to fall. Ideal for families that cannot tolerate downtime — home offices, medical equipment, security systems.
Side-by-Side Comparison
| Feature | On-Grid | Off-Grid | Hybrid |
|---|---|---|---|
| Upfront cost | Lowest | Highest | Medium |
| Works during power cut? | No | Yes | Yes |
| Net metering eligible? | Yes | No | Yes |
| Battery required? | No | Yes (large) | Optional |
| Payback period | 4–6 years | 8–12 years | 5–7 years |
| Grid connection required? | Yes | No | Yes |
| Best for | Urban homes, reliable grid | Remote, no grid | Urban + backup needs |
| Subsidy eligible? | Yes | Limited | Yes |
Which System Should You Choose?
For most Bangalore homeowners with a reasonably reliable grid supply, an on-grid system delivers the fastest payback and best return on investment. If you experience frequent cuts of 2–4 hours per day, a hybrid system with a 5–10 kWh battery is worth the extra investment for the peace of mind alone. Off-grid is only recommended for genuinely remote locations.
The good news: if you install an on-grid system today, most modern hybrid inverters allow you to add batteries later as a retrofit — so you don't have to decide everything upfront.