Solar Controller Sizing Calculator

Find the right solar charge controller for your system

Use our Solar Controller Sizing Calculator to determine the appropriate charge controller size for your marine, RV, or van solar system. Enter your solar panel wattage and battery voltage to get a recommended controller size for your system.

How to Size a Solar Charge Controller

Choosing the right solar charge controller starts with understanding your solar array and battery bank. A charge controller regulates the power coming from your solar panels and delivers it safely to your batteries.

For an MPPT charge controller, the recommended size depends primarily on your solar array wattage, battery voltage, and the controller's maximum charging current. The controller must also be compatible with the solar array's operating voltage and maximum current.

Use the calculator above to estimate an appropriate Victron SmartSolar MPPT charge controller for your CMP SunPower solar panel system.

Shop Solar Charge Controllers

Ready to build your solar power system? Browse our selection of solar charge controllers and find the right MPPT controller for your CMP solar array and battery bank.

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Need help selecting the right equipment for your system? Contact CMP for assistance with your solar power system design and component selection.