Your inputs
Editable example valuesYour estimate
Live calculationPanels needed
4 panels
Installed array
0.8 kWp
Nominal battery storage
5.56 kWh
Planning roof area
5.04 m²
Remaining area
2.96 m²
Planning estimates, not equipment approval. Review the assumptions below before choosing a system.
No location or tariff is detected automatically. All results use the values you enter.
What is this tool used for?
Estimate panels, battery storage and roof area from your camper's daily electricity use. The area allowance does not prove the panels fit; check the layout and allow extra energy to recharge after cloudy days.
How this is calculated
N = ⌈1000E ÷ [H × (1 − λ/100) × P]⌉; B = E × n ÷ (D/100) ÷ (η/100); A = N × L × w × (1 + a/100); E = Daily AC energy demand · kWh; H = Design peak sun hours / day; λ = Total solar losses · %; P = Panel rating · W; n = Days of backup without solar; D = Usable depth of discharge · %; η = Battery-to-AC efficiency · %; L = Panel length · metres; w = Panel width · metres; a = Access & spacing allowance · %
Before you use the result
Estimate panels, battery storage and roof area from your camper's daily electricity use. The area allowance does not prove the panels fit; check the layout and allow extra energy to recharge after cloudy days.
Tool guide
Estimate panels, battery storage and roof area from your camper's daily electricity use. The area allowance does not prove the panels fit; check the layout and allow extra energy to recharge after cloudy days.