Solar System Calculator
Size your solar panel array, battery bank, and inverter based on your energy needs and location.
New to off-grid? Start with our 3-question path finder for a personalized off-grid guide.
Calculation Assumptions
- 75% overall system efficiency (wiring, temperature derating, charge controller, battery round-trip)
- LiFePO4: 80% depth of discharge · Lead-acid: 50% depth of discharge
- 20% battery safety margin for capacity headroom
- Prices in INR as of 2026-06-19. INR retail prices for Indian market (panels, batteries, inverters). Verify quarterly on Amazon.in, IndiaMart, or manufacturer portals.
- Inverter sized at 1.25× peak load; MPPT controller sized at 1.25× array watts ÷ system voltage
System Summary
Updates live as you adjust inputs.
Solar Array
540
W
Panels
1
× 540W
Battery
250
Ah @ 24V
Inverter
1,500
W
Solar Array
1 panels
540W × 1 = 540 W total
Min required: 485 W (at 5.5 peak sun hrs)
Battery Bank
6,000 Wh
250 Ah at 24V · LiFePO4
2 days autonomy · 20% safety margin
Inverter & Charge Controller
Inverter
1,500 W
pure sine wave
MPPT Controller
30 A
charge controller
Estimated Cost
Estimates based on INR retail prices for Indian market (panels, batteries, inverters). Verify quarterly on Amazon.in, IndiaMart, or manufacturer portals. Prices as of 2026-06-19. Does not include installation labor or permitting.