What Size Charge Controller Is Best for a 200Ah Battery?
Short Answer: A 30-40A MPPT charge controller is ideal for a 200Ah lead-acid battery in a 12V solar system. Calculate using the formula: Solar array watts ÷ Battery voltage × 1.25 safety factor. For lithium batteries, 20-30A may suffice due to higher charge acceptance. Always match controller type (PWM/MPPT) to your solar panels’ voltage. Charger … Read more