Tools
One question, one honest answer.
Each calculator checks one decision against the ratings that really limit it. When a safe answer needs a number you don't have yet, it tells you which one, rather than guessing for you.
- Calculator12V wire size calculator: AWG & mm²Size a one-way copper run, see the ampacity and voltage-drop constraints, then open the circuit.Checked Sep 11, 2026 · 4 sources
- CalculatorDC-DC charger size calculatorCompare vehicle input demand, alternator headroom, battery/BMS limits and exact charger limits.Checked Sep 11, 2026 · 3 sources
- CalculatorLiFePO₄ fuse size calculatorFind the preliminary sizing inputs, then check the exact fuse, holder and whole-bank fault current.Checked Sep 11, 2026 · 10 sources