Off-grid solar system sizing calculator

For stand-alone systems (no grid connection), enter your daily load, pick a location, and get a starting point for PV array size, battery bank, and inverter. This is a first-pass sizing tool. A real design should factor in your specific load profile, temperature derating, and shading.

Daily energy load

Wh / day

Small off-grid cabin: 1,000-3,000. Rural home: 3,000-8,000. Small commercial: 10,000+.

Peak power draw

Largest continuous load, e.g. fridge + a few lights + laptop running at once.

Location

System voltage

Days of autonomy

Battery chemistry

Panel wattage

Wp / panel

Recommended system

Sized for your inputs

PV array: -
Battery bank: -
Inverter: -
Charge controller: -

Get a quote for this system

Estimates assume 85% inverter efficiency and standard cabling losses. Actual sizing should account for your load profile, temperature, shading, and available panel form factors.