OK, I have 3 x 130ah AGM/Cranker hybrid style batteries and they weigh about 28kg each. Their performance has been ok I guess for running the fridge and other low voltage and 240V inverter loads. They worked well with the warn 15000lb rear mount winch.
I am looking at the vast range of Lithium batteries out there and confused about a number of things. Lets keep it simple, say 100ah battery.
Prices vary from $300 to discounted $800 and charge rated and discharge rates vary accordingly. Its hard to equate performance when the key deliverables claimed by each supplier is twice the depth of discharge capacity, faster recharge and all having a BMS of some description and weigh about the same. In previous years with Lead Acid and AGM it was about the weight and storage capacity, yet now I don't have the knowledge to choose on performance alone. My application is 12V fridge drawdown and running a 240V 3000w inverter for the coffee machine and a few LED lights. I have hydraulic winches so no high current draws. I run a marine Optima for the crank.
So for those in the know, is it worth my while buying a $800 Itech or similar that can supply 200amps for a constant drain or go for a cheaper unit that has a max draw of say 50amp? The obvious issue is that the inverter needs to supply 100amps for the coffee machine at 12V, so the ultra cheap at $300 wont work, but there are others that will handle 100amp continuous at circa $500.
The issue isn't the cost so much as 'gold plating' the solution and if I didn't have the coffee machine then the ultra cheapie at $300 would seem to fit the bill. My AGM setup was great from the perspective they could supply 1000amps peak for 10 mins, which worked with the big rear mounted electric. I dont need that type of redundancy. I run a renogy 80amp dcdc charger and would prefer not to have to replace it - believe it is Lithium compatible. I run a 300amp alternator alsoso plenty of grunt avail for the winch, but 80amps is the limit of its charge capacity unless I run a bridge setup to punch 300amps into the lithium, which is no doubt the wrong thing to do!
Look forward to your considered input, thanks. I am not prepared to get 'wed' to a brand unless it meets my demand load.