Off-Grid

When there is light, the system uses PV modules convert solar energy into electrical energy, and through the inverter to power the load, at the same time charge the battery; when cloudy or no light, the battery energy through the inverter into alternating current to power the load.

PWM Solar Charge Controller :

A PWM solar charge controller stands for “Pulse Width Modulation”. These operate by making a connection directly from the solar array to the battery bank. During bulk charging, when there is a continuous connection from the array to the battery bank, the array output voltage is ‘pulled down’ to the battery voltage. As the battery charges, the voltage of the battery rises, so the voltage output of the solar panel rises as well, using more of the solar power as it charges. As a result, you need to make sure you match the nominal voltage of the solar array with the voltage of the battery bank.