Off-grid Solar System Calculator
Enter daily energy use, maximum load, backup days, sunlight and battery type to estimate PV, battery, inverter and system voltage.
Off-grid Solar System Calculator
Off-grid Solar System Calculator
Estimate the first configuration from daily energy use, maximum load power, backup days, sunlight condition and battery type.
Project Load Inputs
Move the sliders and the estimate updates instantly for PV power, battery capacity, inverter size and system voltage.
Daily Energy Consumption
5 kWh
Maximum Load Power
3000 W
Backup Days
2 Days
Sunlight Condition / Region
Formula note: PV power = daily kWh x 1000 / 4 peak sun hours x sunlight factor. Battery capacity = daily kWh x backup days / usable DOD. Inverter size = peak load x 1.25, rounded up to a common specification.
Preliminary Estimate
Ready for quotation review: 1630Wp PV / 20.0kWh battery / 5000W inverter.
Solar Panel Power
1630Wp
Battery Capacity
20.0kWh
Inverter Power
5000W
System Voltage
48V
Approx. 420Ah @ 48V
These results are preliminary estimates. Final design should review load type, surge current, installation environment, sunlight conditions and budget.
Contact Us
Need an engineer to review the estimate? Send your load list for sizing advice
Not sure how to size the battery? Send your requirement and we will recommend a suitable solution.