Fitting second alternator to Isuzu 4LB33 engine

[Tony Brooks]

5 hours ago, Sir Nibble said:

There are so many misconceptions about this. Relays, diodes, whatever. Split charge systems do NOT as we see claimed so often "prioritise" one battery. They do not charge one battery then the other, they charge both. The point is not to separate the charging of two batteries, it's to separate the discharge.

Whilst I fully agree I fear the fact that sometimes with very discharged batteries the charging voltage might take a time to reach the 13.6 to 13.8 volts most VSRs energise and until then just one battery is being charged allows the marketing bullshine merchants to make that claim and far too many are happy to accept it and not question it as we have seen.