I need help sizing a system for my RV. I have a Honda 2000i generator that is rated at 2000w peak and 1600w running, 120VAC, 13.3A.
I am considering putting a couple of these lithium batteries in the RV and need to know approx how long it will take to replenish 100Ah on a daily basis using my generator and a Victron MultiPlus 2000VA inverter/charger.
I could probably calculate the charging time myself but I don't have enough info on the Victron MultiPlus 2000VA. I know that I can set a limit to the amount of current it draws when connected to shore power or generator. But, what I can't find in any of the docs that I have looked at is how to correlate the input current with the charging amperage. For example: if I set the draw limit at, say, 12A so I don't trip my generator, how many amps is the Victron going to put out?
It's just math (volts x amps = watts). 12A x 120v is 1440w going in to the Multi.
Your MultiPlus 2000 has a maximum charge current of 80A. 80A x 14.4v (general charge voltage of a 12vNom system) is 1152w. So, as you can see, setting a 12A input current limit will not limit the charge current out, since 12A at 120v is still more wattage than 80A at 14.4v out.
To get a more thorough understanding of the basic fundamental calculations and physics of AC and DC electrical, Victron's free book "Wiring Unlimited" is a phenomenal resource: https://www.victronenergy.com/media/pg/The_Wiring_Unlimited_book/en/index-en.html
