SOLAR SYSTEM SIZING
Estimate capacity from kWh consumption. This is a preliminary energy calculation, not a design or generation guarantee.
Enter positive values within the stated limits.
- Annual consumption
- 7,200 kWh
- Calculated array capacity
- 5.48 kWp
- Module count
- 10
- Capacity rounded to whole modules
- 6 kWp
- Annual generation under the assumptions
- 7,884 kWh
HOW TO READ THE RESULT
Take consumption for the last 12 months and divide by 12. One seasonal month can distort the result.
Formula: annual consumption ÷ (365 × sun hours × performance ratio). The module count is rounded up.
4.5 hours and a 0.80 ratio are adjustable educational assumptions, not site data. The ratio accounts for aggregate losses. A 600 W module is an example, not a promised specification.
Matching annual generation to consumption does not mean autonomy. Seasonality, daytime load, shade, roof and connection conditions need separate analysis. An on-grid system shuts down when the grid fails.
This tool does not size the battery or inverter. Backup design needs critical-load power, starting currents and required runtime.
DISCUSS THE SYSTEM