Solar PV is a very straightforward proposition. Hook a solar panel up to a DC load and it will run until the sun goes down. Connect solar panels to a grid-tied inverter and, as long as the sun is shining, power will be sent to the utility. It’s all fairly easy — until the sun stops shining.

Where it starts to get more complex is with energy storage, for use when the sun isn’t shining or when the grid is down. Storing electricity to do useful work later requires batteries connected to a solar PV system. Once a battery is added, a charge controller becomes one of the most important system components.

Anyone going off-grid or wanting to use a hybrid system that can sell solar-generated electricity during the day and store that power for use at night, during an outage or during peak times will need a solar charge controller.

Item number	AP-50
Rated Current	50A
DC input Voltage	12V, 24V, 36V, 48V
Max input voltage	150V

MPPT is a control technology in which the solar controller controls the solar panel to make it work at the maximum power point.

Specifically: because the electric power is P=IU, the controller controls the output voltage value of the battery panel, so as to achieve the purpose of controlling the current value, so that the product of I and U is equal to the maximum power point. It is mainly a point based on the working curve of the solar cell.

In addition, the MPPT method is only applicable to the DC_DC conversion controller, not to the controller of the drop-out phalanx.

mppt tracer solar charger controller regulator