payydg · Apr 1, 2022

Going to upgrade from the standard 45amp to 100 amp alternator as I need to change the alternator anyhow and give me options for the future plus i have a split charge system with a fair few auxiliaries.

Does a 100amp alternator charge the batteries better - obviously the charging voltage will be the same?

slomofo · Apr 1, 2022

No - Batteries charge as fast/slow as their age and condition allow. The Alternator charges at a regulated 5A to stop a battery going bang, irrespective of it being a 60 or 100A rating

A 100A Alternator gives a greater capacity to run more kit simultaneously, the battery is really only there for starting.

payydg · Apr 1, 2022

slomofo said:
No - Batteries charge as fast/slow as their age and condition allow. The Alternator charges at a regulated 5A to stop a battery going bang, irrespective of it being a 60 or 100A rating

A 100A Alternator gives a greater capacity to run more kit simultaneously, the battery is really only there for starting.

I thought as much. Thanks.

payydg

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slomofo

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payydg

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