Charge Controller Sizing Calculator
Find the right charge controller size for your solar panel array and battery bank.
Input Your System Specifications
Common configurations:
Higher voltage = lower current = smaller cables
Understanding Charge Controllers
MPPT vs PWM
MPPT controllers are more efficient (95-98%) and can handle higher solar array voltages.PWM controllers are cheaper but less efficient (75-85%) and require matching panel voltage to battery voltage.
Battery Compatibility
Ensure your charge controller supports your battery type.Lithium batteries require specific charging profiles.Lead acid batteries need temperature compensation for best performance.
Sizing Rules
Always oversize your charge controller by at least 25% for safety and expansion. Consider future solar panel additions. Higher battery voltage reduces current and allows smaller cables.