Size My Backup

How many solar panels to recharge a power station

Enter the station's capacity and how many peak sun hours you expect, and get the number of panels to fill it in that window. Stations also cap how much solar they accept, so more panels past that limit do not help.

Your numbers

Peak sun hours are the full-sun equivalent per day. 5 is a placeholder, not data for your area; look yours up in NREL's free PVWatts. For a recharge window of several days, enter days x daily sun hours.

How this is worked out