Quote:
Originally Posted by hlev00
Most factory alternators are around 60A for something like a 50hp diesel. They seldom put out more than half of that and that is when charging house batteries too. I would expect something like a Victron 12/12/18 DCDC charger would work if starting is all the battery needs to do. Starting uses very little power and the start batteries charge quickly.
The only other consideration is whether you have a windlass or bow thruster that will run off of the start battery. If so, going up one size to a 30A model might make sense.
Check with a Victron distributor and they can probably help size for you.
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Even 5A DC2DC will do it. A start needs less then 1AH. I would get the 20A renogy DC2DC charger,
cheap and works well, no need and advantage to get a victron here, no communication or integration into venus OS on the 18A or 30A victron
heating bricks anyhow.
Your 3000W inverter I assume you get a victron multi also has a 5A trickle charge output, so when at shorepower the multi keeps lead starter in float if you connect that, no need for a seperate charger
Connect the windlass to the
lifepo4 and not the starter, it has much less voltage sag and supports the
motor better.