To the battery/gen-switch:
It was recommended by the factory techs to keep the gen-switch on at all times - it seems if off the power drains through the starter circuit ??
We changed the factory SAFT battery to a CONCORD.
This comes in a kit, as there is a difference in the mounting hardware + most likely there is some adjustment at the voltage regulator. Seems the Concord battery runs a different resistance level. If this is not adjusted you will constantly get an over-voltage warning: 28.9 to 29.6 V, nominal would be 28V.
One advantage of the Concord is that the outer shell is plastic and generally isolating. Unlike the SAFT with its metal housing, you should have a hard time welding your carkeys to any of the terminals!
Cheers,
3top
PS: How long are your Starter/Generator carbon packs (brushes) holding?