2 pairs of 6v Batteries - wiring best practice?

[pvb]

What sort of cable thickness is ideal?

Just got back from the battery place with new cables for V2 diagram as discussed but they are a gauge down from what was already in the boat. The new ones are 40mm2. I asked him to over spec it but I'm thinking maybe it should be up a grade now?

I'm sure your 40mm2 cables won't be a major problem.

 

[VicS]

What sort of cable thickness is ideal?

Just got back from the battery place with new cables for V2 diagram as discussed but they are a gauge down from what was already in the boat. The new ones are 40mm2. I asked him to over spec it but I'm thinking maybe it should be up a grade now?

I'm sure your 40mm2 cables won't be a major problem.

I think I agree with pvb

Strictly the answer is that it depends on the current and the cable length but I guess you will not be using the T105s for engine starting so the current will be much lower than the engine start battery will have to supply.