Solar & Power

Charge Controller Sizing Calculator

Size MPPT or PWM charge controllers for safe operation.

Last validated: Pending

Calculate required controller current (Amps) based on PV power and battery voltage with safety margins.

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Input Pattern

Enter values in the left panel, keep units explicit, run the calculation, then copy or share the result. Invalid fields are highlighted immediately.

Input your array specs

We'll find the right controller sizing.

Enter the required inputs for Charge Controller Sizing Calculator and confirm each value is in the expected format.
Run the tool once with your baseline case and review the output values and notes.
Adjust inputs for at least one alternate case and compare results before deciding.

Auto-generated from the tool's current default or entered inputs.

Use this to compare two input sets and quantify change in key outputs.

No comparable scalar inputs were detected for this tool.

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Optimize your charging with advanced MPPT and PWM controllers.