Battery Charging Circuit Using Solar Panel

When charging batteries with solar energy one should use a controller when the rated amperage of the solar panel is above 1 of the battery capacity.

Battery charging circuit using solar panel. These solar cells should be able to charge one 1 2 volt battery or two 1 2 volt batteries in series at a rate of 20 ma for 200 mah battery 30 ma for a 300 mah battery or 60 ma for a 600 mah battery. To charge a battery with a solar panel connect a charge connector to the solar panel. Then run wires from the battery to the charge connector making sure to match the positive and negative poles. Here is the simple circuit to charge a rechargeable lead acid battery 12v 1 3ah from the solar panel.

The position of the sun in the sky can impact a panel s charging speed. The charging circuit for these batteries is simple a solar cell connected to a diode then connected to a nicad battery. I use same rule for li ion battery. If a battery is totally drained a solar panel can energize the cells within five to eight hours.

Upgrading to a relay changeover. Place the solar panel in sunlight. It is essentially the rule of the thumb for this procedure. The charger has voltage and current regulation and over voltage cut off facilities.

This solar charger has regulation of current voltage and also has over voltage cut off services. Current of solar cell should have 1 10th of capacity battery diveded by 1 hour for ni mh batteries. Voltage of solar cell 1 5 x voltage of battery so 3 7v to 4 2 v of li ion is equivalent of 5 55 v to 6 3 v of solar cell. A 12volt solar panel has up to 25 years service time that s make huge money save and powering the life.

There are two main types of controllers in the market which include on off and pulse width module pwm. It is called c rate rule. The total charging time will vary depending on the state of a battery. Give the connections according to the circuit diagram.

In our 4rth automatic solar light circuit we incorporate a single relay as a switch for charging a battery during day time or as long as the solar panel is generating electricity and for illuminating a connected led while the panel is not active. Now set the output voltage by adjusting pot rv1 check the battery voltage using digital multi meter. This circuit may also be used to charge the lead acid battery at constant voltage because o p voltage is variable. The circuit harvests solar energy to charge a 6 volt 4 5 ah rechargeable battery for various applications.

Solar panel battery charger 100 watt 12v generate 13 6 volts to 17 0 volts dc electricity allows charging li ion or lead acid battery. 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.