Battery Charging Solar Panel Circuit

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

Battery charging solar panel circuit.

This solar panel power switch circuit replaces the diode and connects the panel to battery through a relay contact. Generally a fully discharged 12 volt 100ah battery needs 1200 watts of energy to be 100 recharged. Solar panel charge controller wiring intro solar panel charge controller wiring diagram and step by step guide for off grid solar power system wiring. The output voltage and current are regulated by adjusting the adjust pin of lm317 voltage regulator.

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. 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. Use some more wire supplied to connect the ve end of the battery holder to any longer of the two legs of the led. Battery is charged using the same current.

The solar panel consists of solar cells each rated at 1 2 volts. The circuit uses a 12 volt solar panel and a variable voltage regulator ic lm 317. For a 12v 1 2ahr battery the charging current is going to be 100ma for 12 hours or 330ma for 4 hours along with a regulator circuit is going to be necessary to protect against overcharging. For any 12v 4 5ahr battery the charging current is going to be 375ma for half of the day and a bigger solar panel is going to be necessary.

Connecting the solar panel charge controller mppt or pwm are the same solar battery and the pv array in the right way is the essential work before enjoying the solar energy. 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. The longer leg of an led is always interfaced with the ve side of the circuit. The transistor is the only active component which is positioned as a switch for preventing the battery voltage from reaching the connected leds during day time.

When loading a battery during the day from a solar panel it can be partially discharging through the panel after nightfall. Connect the negative leg of the battery holder to red positive terminal of the solar panel. The charging current passes to lm317 voltage regulator through the diode d1. The charger has voltage and current regulation and over voltage cut off facilities.

Upgrading to a relay changeover.