Using Solar Panels To Charge Leisure Batteries

Divide the wattage of the solar panel by the voltage of the battery to get the number of amps your charge connector needs to handle.

Using solar panels to charge leisure batteries.

Dual battery bank having two independent batteries or sets of batteries performing different functions. Assume you take a discharged 100 amp hour battery and charge it with a 30 watt solar panel under ideal summertime light conditions. Charge time battery capacity ah ampere rating of solar panel 10 of ct. Using this example you can see that it will take at least 100 watts of solar power to recharge a 100 amp hour battery in a few days.

Then take the battery capacity which measured in ah and divide it by the amp rating the result from prior computation of the solar panel and then adding 10 of the charging time to it. The additional 10 is to make sure that the battery is fully charged. My plan is to use a 400w inverter attached to the battery at night then use the solar panel to trickle charge the battery at night. I am looking to use a 12v battery during the night to run 2 lights a small fan and some small speakers.

Most likely a car battery possibly a marine gel battery. Solar array the solar array is the panel or set of panels. After a full week the battery will be just about fully charged. A complete note on solar panel installation with calculation examples the dc load light fan etc is directly connected to the charge controller and can be fed up by two power sources.

Then run wires from the battery to the charge connector making sure to match the positive and negative poles. The direct load can be directly powered up through solar power and a charge controller during the sunshine day time and during the shading night the dc load can be powered up using the battery. This first stage starts when the sun shines or when the generator is turned on. The bulk phase first stage the bulk phase is primarily the initial stage of charging a battery using solar energy.

To wire two or more solar panels and batteries in parallel simply connect the positive terminal of solar panel or battery to the positive terminal of solar panel or battery and vise versa respectively as shown in the fig below. Charge 100ah battery standard size solar panel is 58 inches by 27 inches 2 solar panel for 150 watts 12 volt each for 5 sunshine light hour takes to recharge 100ah 12 volt battery. To charge a battery with a solar panel connect a charge connector to the solar panel. Solar charge controller keeps the solar panel from over charging your battery or batteries.

The bulk phase will initiate when the battery reaches a low charge stage and that is usually when the charge is below 80.