Calculators
Solar charge calculator
How much will your panel actually put back?
Set your battery, your panel and the time of year — we'll estimate the daily top-up in real watt-hours, not house-sized kW.
Van consumption calculator
Not sure what your gear uses? Tick what's on board and dial in how hard you run it. Tapping a selected option again clears it.
Ticked items add up to 0 Wh/day
Fills in automatically from your ticks above — drag to fine-tune, or if you've got exact figures from a device.
Daily solar top-up
With your loads running
Estimates use average UK peak sun hours by month and typical system losses (cabling, MPPT, temperature). Actual output varies with weather, exact latitude, roof orientation and battery age — treat this as a planning guide, not a guarantee.
Want a system properly sized and fitted around your van? Get in touch with Powerhouse Off Grid.