Went out to charging/battery problems on a Stoke-on-Trent boat with Beta 43 and unusual Delco Remy 12V 150A alternator. Main negative lead from batteries taken to engine bearer so engine/alternator earthing through just exhaust/hull. An Adverc has been fitted but since the earth senses at alternator and postive at batteries it doesn’t compensate for any voltage drops on neagtive charge lead – charging voltage approx 0.5V down at 60 amps. Been like that since built in 2003 but problems develop as new owner is a livaboard. Moving earth to alternator casing solves poor charging voltages. New 600AH bank of Trojan batteries fitted with Adverc adjusted to suit.

Before and after photos. Before 3KW Victron Multiplus drawing from one end of bank.  Also fit a Victron BMV700 Monitor. If you look carefully I’ve switched start battery location in the tray to make fitting the Victron BMV Shunt neater and limit cable runs – using the negative start battery terminal to take most negative cables to. This is a useful way to minimise the number of terminals fitted to the Victron Shunt. They’re now properly balanced.  Use the best quality copper tube terminals with 50mm tinned cable.

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