Ok, a small variation to the learning theme here.... I have learnt something but I need you clever people's input to cement the learning further .... here goes.
On our boat we have a 12v system. Not counting or talking about the starter battery but the leisure batteries. 2 iirc 180 amp AGM batteries. total 360 amp hours but only in reality 180 as they should never be taken below 50% state of charge, my ref for that says about 12.06v = 50% ( resting check - no load) - that much we all know - They are about 18 months in to their expected 4-5 year service life.
My learning today is that the Aferiy P210 'solar battery' one of the packs that comes with 2kw/h of lithium, charger MTTP controller and inverter all in one is a decent price but critically they have a 12v 25 amp anderson port output - I've asked and they say its regulated to 13.8 volts. That's me all educated and pleased to be so.....
The Q is I want to add this 13.8v to my boat to the fuse panel in parallel with the lead acids (at their max fully charged rate of 12.8v.) My understanding is the 13.8 v from the lithium will service the loads with a very small dribble back to the lead acids. So if you like a bit like the 'hybrid' system many use as a permanent install but on Percy it would be use only no charge, as the Aferiy would have duty back at home when we are not on the boat a real bonus duel use for out type of boat/cottage living - we'd charge separately ( different topic).
I've tried this with my Ecoflow but that 12v output is regulated to IRC 12.8 and also 10 amps - the water pump and bath pump can get close to that and have tripped it before. Also it is via the cigarette type socket that are not idea as they work loose - so not as useful and under load seems to drop voltage so not good for the fridge.
So I am hoping the 13.8 from an Aferiy would work without issue if connected in parallel with the boats existing 12v system?
Any advice ?
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