Split charging

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It pointed to a basic split charge wiring diagram.

If you haven't got one, let me know and I'll get that one scanned and put on here.
 
try using starter solenoid from classic mini or other vehicle from that era that used separate starter solenoids and have the large terminals for connecting
 
Credit were it's due. If somethings good, productive and works properly then thats the one to use. You cannot beat quality advice especially when it's free.
 
It dont help that "Faults and Questions" are commonly referred to as "FAQ"s :rolleyes: The title of "Faults and Questions" is a total misnomer as newbs seem to think its the place to post questions, not to find the Answers to "Common Faults and Questions"
 
Would make more sense to link the FAQ at the top ( which does nothing i might add ) to the common faults & questions section
 
Working as a marine electrician this is a common task I undertake.

The easyest way ive found is to use a VSR (voltage sensitive relay)
The Voltage Sensitive Relay (VSR) allows two batteries to be charged at the same time. When the engine is started and the start battery reaches 13.7 volts, the VSR engages, allowing two battery banks (start and aux) to be charged simultaneously. When the voltage drops below 12.8 volts (eg the engine is stopped), the VSR disengages, separating the batteries. This system eliminates the possibility of draining the start battery and protects sensitive electronic equipment powered from the house battery from harmful engine start up spikes.

Always ensure cables are sized correctly as undersized cables cause voltage drop and in extreme cases FIRES.
Always install a fuse at either end of the VSR as close to the battery as possible.
Ensure cables are protected from chaffing.
 
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