Question 1

Should I buy an MPPT or PWM solar charge controller?

Accepted Answer

MPPT controllers are up to 30% more efficient than PWM controllers, especially in cloudy weather or when panel voltage is significantly higher than battery voltage.

Question 2

How do I calculate what charge controller ampere size I need?

Accepted Answer

Divide your total solar panel wattage by your battery bank voltage (e.g., 600W / 12V = 50A; in this case a 50A or 60A controller is recommended).

Charge Controllers

10A PWM Charge Controller

20A PWM Charge Controller

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