Size of Alternator

[Mashmaster]

I am starting the process of converting my 2003 Minnie to Lithium from FLA.

I have looked and can't find the specs for the alternator. Does anyone know what the rated charge is for the stock alternator? I want to know what the amperage of the starter battery/alternator is so I can ensure the DC-DC charger I bought from Renogy is the correct amperage.

[creativepart]

If you'll be disconnecting the new house batteries from the Alternator charging, then all you'll need is about 30 amps or more from the DC2DC charger.

See, the alternator is variable output and adjusts constantly based on engine speed and battery resistance. In a lead acid battery the resistance is really low when the battery is discharged and rises as the battery charges. Near fully charged the battery won't accept much charge at all and it's resistance is so high that the Alternator can't put out much charge at all. This "auto regulating" nature of LFA batteries is why Alternators don't generally have any kind of regulators on them.

This is the reason you don't want an Alternator charging LiPO batteries - Lithium batteries don't increase resistance as they charge. They will keep taking more and more and more power from your Alternator and this is what burns up Alternators.

You don't need to match the DC2DC charger's charging to your Alternator's charging output. You just need enough to do a decent job charging those LiPO batteries with the kind of voltages and amperage that they like to stay healthy.

I have a 30amp DC2DC Victron charger on my 400Ah of Lithium house batteries and that's plenty for keeping my batteries fully charged while driving.