Battery Charging Circuit Using Solar Panel

The circuit harvests solar energy to charge a 6 volt 4 5 ah rechargeable battery for various applications.

Battery charging circuit using solar panel.

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. The charging circuit for these batteries is simple a solar cell connected to a diode then connected to a nicad battery. If a battery is totally drained a solar panel can energize the cells within five to eight hours. Current of solar cell should have 1 10th of capacity battery diveded by 1 hour for ni mh batteries.

How to operate this solar battery charger circuit. To charge a battery with a solar panel connect a charge connector to the solar panel. 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. It is called c rate rule.

Place the solar panel in sunlight. This circuit may also be used to charge the lead acid battery at constant voltage because o p voltage is variable. A 12volt solar panel has up to 25 years service time that s make huge money save and powering the life. I use same rule for li ion battery.

Solar panels here is a solar charger circuit that is used to charge lead acid or ni cd batteries using the solar energy power. An inverter converts this dc electricity to ac electricity used home or commercial devices. Then run wires from the battery to the charge connector making sure to match the positive and negative poles. The total charging time will vary depending on the state of a battery.

The position of the sun in the sky can impact a panel s charging speed. It is essentially the rule of the thumb for this procedure. 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. There are two main types of controllers in the market which include on off and pulse width module pwm.

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. Give the connections according to the circuit diagram. Here is the simple circuit to charge a rechargeable lead acid battery 12v 1 3ah from the 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.

Upgrading to a relay changeover. Now set the output voltage by adjusting pot rv1 check the battery voltage using digital multi meter.