The following table lists the recommended fuses for the ProBoost:
| Cable | Cable Colour | ProBoost25 | ProBoost40 |
| Solar |
Green |
40A |
60A |
| Alternator |
Yellow |
||
| Output |
Red |
||
| Ignition |
Blue |
3A | |
All recommended fuses should be connected in series in circuit.
Bolt down fuses are preferred as they ensure a low resistance connection.
Blade type fuses are not recommended. These fuses can result in a high resistance connection which causes excess heat, which may damage the fuse holder and/or the wiring.
Self-resetting circuit breakers are not recommended. These may trip prematurely due to the heat generated by the current flowing through the wires.