Solar pSEO Landing

UK Winter 24V Off-Grid Solar Calculator P2

Profile 2: size battery Ah and panel watts for UK Winter conditions at 24V using 2.3 peak sun hours and 2-day backup.

Sizing Snapshot

Daily Energy

1807 Wh

Battery Bank

181.8 Ah

Solar Array

1071 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

Low winter sun window requiring larger battery and panel overhead.

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.

For the same energy demand, lower voltage systems need more current. That translates into larger Ah requirements and often thicker cabling.

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.