What's if I have Solar panels, 285w 38.3v, 200w 25.5v. What's the size of charger controller and how to connect in series or parallel to charge battery of 12v 200ah?

To determine the size of the charge controller needed for your solar panels, you need to calculate the total wattage of the panels.

The total wattage of your solar panels is 285W + 200W = 485W.

Next, you need to calculate the total voltage of the panels when connected in series.

When connected in series, the total voltage is the sum of the individual panel voltages, so 38.3V + 25.5V = 63.8V.

For a 12V battery, you will need to connect the panels in parallel to ensure the voltage output matches the battery voltage.

To connect the panels in parallel, you will connect the positive terminals of both panels together and the negative terminals together. This will maintain the voltage at 12V while increasing the current output.

For a 485W system with a 12V battery, you will need a charge controller that can handle at least 40A (485W / 12V = 40.4A).

Make sure to choose a charge controller that is compatible with the voltage and current output of your solar panels and battery.