Karnataka solar with battery calculator
Size a hybrid or off-grid solar system for a Karnataka home: panels, battery bank, inverter and roof area, with sun hours for your district and the effect on your bill.
- Sun hours by district and PIN code
- Hybrid or off-grid
- Bill and subsidy worked out
Enter your units to see the bill.
Sun and solar output in Karnataka
Sunshine in Karnataka is 5.0 to 5.6 kWh per m² a day, by district (average 5.4). So 1 kW of panels makes about 4.1 units a day here, or 122 units a month.
The sunniest district is Chitradurga and the least sunny is Dakshina Kannada.
| District | Sun, kWh/m² a day | Units a day from 1 kW | Units a month from 3 kW |
|---|---|---|---|
| Chitradurga | 5.6 | 4.2 | 378 |
| Chikkaballapura | 5.6 | 4.2 | 378 |
| Bengaluru Rural | 5.6 | 4.2 | 378 |
| Chikkamagaluru | 5.2 | 3.9 | 351 |
| Kodagu | 5.0 | 3.8 | 338 |
| Dakshina Kannada | 5.0 | 3.8 | 338 |
NASA POWER long-term annual average. Panels at a 75% performance ratio, as in the calculator. Shade, dust and the roof angle change the real figure.
Karnataka has net metering rules for homes. See the bill with rooftop solar and net metering.
Solar with battery questions
What is the difference between hybrid and off-grid solar?
A hybrid system keeps your grid connection: panels cut your bill through net metering and a battery runs essential loads in a power cut. An off-grid system has no grid connection, so the panels and battery must cover your whole use, including cloudy days.
Is there a subsidy for solar with a battery?
For grid-connected systems, yes. The PM Surya Ghar subsidy is worked out on the solar panel capacity, and the battery is not subsidised. Off-grid systems are not eligible.
How much roof space does it need?
MNRE says about 10 square metres of shadow-free area per kW. A 3 kW system needs about 30 m², roughly 320 sq ft.
Where do the sun hours come from?
From NASA POWER’s long-term average of daily sunshine for your district. Enter your PIN code to pick the district automatically.