Wiring in a battery charger - one more question

[webcraft]

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A sparky friend wired my battery charger up a few weeks ago - not used yet because I have only just fitted the shorepower - and when I went to check it today he had wired the positive to the positive of the engionge start battery and the negative to the negative opf the engine start battery.

I want to connect the domestic battery bank to the charger, not the engine start battery, so have moved the positive terminal to the positive terminal of the nearest of the two linked 110AH domestic batteries.

The negative terminal of the engine start battery is wired directly to the engine earth, so I guess I can just leave the negative lead from the charger on that? (The manual says to connect direct to engine earth, not on a battery terminal, but can't see any real reason for that??)


- W

 

[matthewriches]

What charger do you have? Strange request as say you had a commercial Cummins, some have isolated engine components so the starter and alternator as well as senders all have their own negative connections and theoretically the block has no potential whatsoever.

I’d go for negative from charger on the negative bar or a battery negative (assume they’re all strapped together) and positive from charger to the opposing domestic positive.

 

[PaulRainbow]

I’d go for negative from charger on the negative bar or a battery negative (assume they’re all strapped together) and positive from charger to the opposing domestic positive.

Me too. I'd connect the positive to the same terminal as the domestic loads.

 

[Richard10002]

Me too

 

[gordmac]

Stick it on and check if the battery is being charged, if it is leave it be?