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Q   Why does shortening the leads on the Combiner 50 void the warranty?

A   When two batteries are connected in parallel there can be a very high current flowing from the one at a higher voltage to the one at a lower state of charge. The length and size of the leads supplied provide a resistance to high currents which protects the relay from welding its contacts together when it closes. Since the current drops to zero as the batteries reach full charge, there is no residual voltage drop across these wires so the batteries can reach full charge.

So shortening the leads can cause the Combiner to be damaged through incorrect installation which is not covered by warranty.