Solar pSEO Landing

California 24V Off-Grid Solar Calculator P2

Profile 2: size battery Ah and panel watts for California conditions at 24V using 5.4 peak sun hours and 1-day backup.

Sizing Snapshot

Daily Energy

1807 Wh

Battery Bank

90.9 Ah

Solar Array

456 W

Inverter Baseline

1250 W

Appliance	Power	Daily Runtime	Wh/Day
Fridge (60W x 24h)	60 W	24.00 h	1440 Wh
Microwave (1000W x 10m)	1000 W	0.17 h	167 Wh
LED Lights (40W x 5h)	40 W	5.00 h	200 Wh

Strong annual sun profile with stable planning assumptions.

Use local monthly irradiance data to tune peak-sun-hour assumptions before procurement.

Cloud-prone months usually benefit from higher autonomy targets and larger reserve buffers.

For winter-heavy climates, panel overbuild is often cheaper than repeated battery deep cycles.

In low-sun conditions, panel oversizing usually improves daily recovery. In high-cloud windows, additional battery autonomy reduces outage risk.

Yes, the model applies chemistry-specific assumptions for DoD and charging to keep estimates closer to practical planning ranges.

Use this for planning and shortlist decisions, then validate with measured appliance duty cycles and local irradiance history.

For this load profile, estimated LIFEPO4 bank sizing is 90.9 Ah at 24V with 1-day autonomy.