Off-grid power system sizing

Pick your equipment, drop your site on the map, and choose when the system runs. JasperPower sizes the solar array and battery storage using location-specific sunlight and temperature, so the design survives the hardest month.

Click the map to set your site location.

Site location

No site yet — click the map (or use ⌖ to locate).

Operational period

Year-round Runs all 12 months

Sizing uses the worst month in this window.

Equipment

No equipment added yet.

Avg load0 W

Peak load0 W

Energy / day0 Wh

Energy / mo0 kWh

System assumptions

Battery chemistry

Depth of discharge %

Days of autonomy d

System efficiency %

Autonomy = days of full load the battery covers with no sun. System efficiency folds in wiring, charge controller and battery round-trip losses.

Recommended system

Solar array

— W

Energy storage

— kWh

Design month—

Sun that month—

Coldest month—

Battery derate—

Usable storage—

Peak / inverter—

Solar irradiance & temperature: NASA POWER climatology (long-term monthly means) for the selected point. Sizing is a planning estimate — verify against equipment datasheets and local conditions before purchasing.