Charging different battery type requirements

[OffGridCirc]

Originally Posted by neoflyer

Can an engine alternator charge all of the different battery hose, flooded, AGM, lithium, etc? I know they all have different voltage requirements but I don’t know what they are. I am thinking of going to lithium for my house batteries but read on another forum the alternator might might not charge them properly. If so, is there a workaround?

Ed
‘05 Holiday Rambler Ambassador.

For a detailed explanation from a very knowledgeable source, check out this video.

https://www.youtube.com/watch?v=jgoIocPgOug

You are bound to the limitations of your stock alternator and the low internal resistance of the lithium. You very much risk the chance of burning up your alternator.



Take a close look at the Victron BMS 12/200 Battery Management System. This is designed for what you are attempting by both limiting alternator output and charging house and chassis batteries safely.

[Allen_C]

Originally Posted by OffGridCirc

For a detailed explanation from a very knowledgeable source, check out this video.

You are bound to the limitations of your stock alternator and the low internal resistance of the lithium. You very much risk the chance of burning up your alternator.



Take a close look at the Victron BMS 12/200 Battery Management System. This is designed for what you are attempting by both limiting alternator output and charging house and chassis batteries safely.

The problem with this video is that modern vehicles have a 2.5-3 to 1 ratio of alternator rpm to engine rpm. It appears they are reading the "engine" rpm and there is a 1:1 ratio to the alternator. If an engine is idling at 700 rpm and had a 3:1 pulley ratio, the alternator is spinning at 2100 rpm, not 700.