New battery setup in camper - LiFePO4

The only advantage I see to have 2 or 3 batteries is if your space requires it. Otherwise a single 180ah is lighter than 2 90ah and will cost less too. A single battery is much easier and cheaper to manage than a bank of batteries.

I don't know if either EV Power and EV Works are better than each other. But EV Power does seem to get talked about a lot and seems to be popular.

Hi Jos. As others have said, the disadvantages of 2 or 3 cell lots are size,weight, cost and monitoring. The one advantage is if in the unlikely instance that a cell did fail, it would be cheaper to replace. I have 4x3.5v 200ah cells. They weigh 42Kg all up with supports and cell connectors but replaced a single 100ah AGM that weighed 38kg. I bought mine from this fellow who, along with his wife, are very knowledgeble and efficient. Because of our dollar devalue lately they have gone up slightly in price. LiFePo4 are becoming more and more popular. Bushtracker Caravans now fit them as an option. Regards,Bob
LiFePO4

The specifications show these types of batteries to be top performers.
If I was in the market for a new battery I’d seriously consider them.
Generally with any deep cycle battery – comparing one single large battery to two half size batteries, adding up to the same capacity – the larger single battery will have the longer life span. The same applies to 3 smaller batteries compared to 2 large etc.
Another advantage, if you have the charger capacity, is this type’s ability to charge at a very high rate, compared to a standard AGM’s (If I read their specifications correctly).

Thanks everyone for the info. While I wait patiently for the arrival of my new camper I'll hopefully have my battery system wants finalized. Manufacturer wants to fit AGM's and can't do an alternative for me, so my option is to get my new camper minus some of the electrics and batteries and get this done elsewhere. I honestly didn't think it was going to be this hard.