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Answering my own question, I think the 3rd mode may be more suitable for Mar-Oct in the Northern hemisphere as the battery then is used to 'cycle round' by charging then letting go of its energy. If it's augmented by good solar production, then solar will be predominantly used and the battery...

Just a short update. I've been working on the catamaran for about five months now. The 6kW solar roof is on and awaiting connection. I settled on a 48V system with twin 15kW electric outboard motors from an Austrian company called Aquamot. They're due to be delivered in the next month. As far as...

Am I right in thinking you've only got a 400W panel on the roof? This may be enough, but after putting a few systems on motorhomes in the past, I've found you can never have enough panels or batteries. I've never splashed out on lithium batteries, but would probably look at building a battery...

Thanks for those great replies Guys. I contacted the seller of the batteries (I've contacted Varta as well and I'm awaiting their reply) and he suggested if I do equalise them to be gentle on them and for no longer than an hour. In response I suggested I could do them for 20 minutes and see what...

Last week I added another 20 batteries, giving a total of 32 batteries (8 banks of 4 for 48V) and built a custom cupboard to house them in the corner of the garage. It runs floor to ceiling and measures 1200mm x 8000mm. It gives around 30kW capacity running at 100-70% capacity. It would give...