I have a 1.6kw RV solar setup with a Victron Multiplus-II 120x2 and 810Ah of Lithium batteries that I use off-grid often. Most of the time the solar is more than sufficient, but I have a backup inverter generator that can do 3kw sustained load if it's cloudy or if I need to run air conditioning. I plug the generator into a 30A RVs shore power cable, which runs directly into the Multiplus AC in.
The system works well, but when I need to top off my batteries with the generator the 120A charger on the Multiplus + base loads ends up only drawing at most 2kw. I'd like to use that extra 1kw of generator capacity 1) to charge faster and 2) because I'm assuming it's more fuel efficient to run at closer to full load rather than half load. So I'm looking for a good option for approximately 80-ish amps of AC to DC charging, which I can hook up to my Lynx busbar. I'd like to stick with Victron products if possible, so that gives three options I can see:
So I have questions:
The system works well, but when I need to top off my batteries with the generator the 120A charger on the Multiplus + base loads ends up only drawing at most 2kw. I'd like to use that extra 1kw of generator capacity 1) to charge faster and 2) because I'm assuming it's more fuel efficient to run at closer to full load rather than half load. So I'm looking for a good option for approximately 80-ish amps of AC to DC charging, which I can hook up to my Lynx busbar. I'd like to stick with Victron products if possible, so that gives three options I can see:
- Skylla IP65 12/70
- Centaur Charger 12/80
- 3x Blue Smart IP22 12/30
So I have questions:
- Does anyone have a recommendation as to which of these three options to use for this project? Pros/cons of these choices? Will they all integrate into my current system equally well?
- With whatever I end up using, would it be better plug it into the AC system currently on the trailer through the panel and therefore Multiplus, or run a dedicated supply cable from them directly to the second 20A AC outlet on the generator?
- What advantages am I gaining by spending 4-6 times more on a Victron-specific option here, as opposed to something like this: https://www.amazon.com/gp/product/B0CGTM9SQ6/