Battery Charging Solar Panel Circuit

Generally a fully discharged 12 volt 100ah battery needs 1200 watts of energy to be 100 recharged.

Battery charging solar panel circuit.

The circuit harvests solar energy to charge a 6 volt 4 5 ah rechargeable battery for various applications. When loading a battery during the day from a solar panel it can be partially discharging through the panel after nightfall. The circuit uses a 12 volt solar panel and a variable voltage regulator ic lm 317. Upgrading to a relay changeover.

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 solar panel consists of solar cells each rated at 1 2 volts. 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. 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.

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 longer leg of an led is always interfaced with the ve side of the circuit. Solar battery charger operated on the principle that the charge control circuit will produce the constant voltage.

Battery is charged using the same current. During broad day light the solar panel produces the required amount of voltage which is applied across the rechargeable battery via the 1n4007 diode and the resistor r. This solar panel power switch circuit replaces the diode and connects the panel to battery through a relay contact. 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.

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. 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. The charger has voltage and current regulation and over voltage cut off facilities. 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 output voltage and current are regulated by adjusting the adjust pin of lm317 voltage regulator.