Solar + Battery Build Calculator

Click anywhere in the shaded areas to size the cheapest solar + battery build that keeps a constant load powered for your target uptime — based on 19 years of hourly sun data from PVGIS. Sizes and cost are reported per kW of load for the panels and batteries only. Panels are assumed to lie flat.

Cost assumptions
Average power on a flat 1 m² panel, day and night, over . Darker is sunnier.
Click a location to begin.

Average year

Each point is the mean across all years () at that hour of the year.