How Long To Charge 12v Battery With 100w Solar Panel

The solar charge times above assume a 25 degree celsius day with the panel pointed directly at the sun.

How long to charge 12v battery with 100w solar panel. To get the most effective charging by a solar panel you have to maximize the amount of current by keeping the board pointed directly to the sun. For an effective charge you need to make sure that the panel is directly facing the sun and no obstacles in between. In most cases a solar panel that produces 1 amp of current takes 5 8 hours or more depending on the size of a battery. The first thing you have to do it to compute for the ampere rating of the solar panel by following the equation below.

Let s say you want to compute for the average charging time of a system with a 12v battery with 50 ah capacity and a 15 watts solar panel. Environmental factors will likely increase charge time. 10 watt 18 volt solar panel charging a 12v 10 amp hour lead acid battery 120 wh from 50 full to full time 60wh x 2 10 watts 12 hours.