Kroswind said:
is there more to high capacity batteries that I don't know about? I am financially well off and would like to know what kinds of options I have available. I would like to try and generate/store as much power as I possibly can, and I don't mind spending money to do so.
I think you are a candidate for Lifepo4 prisimatic cells, even though it can be argued that they are cheaper in the long run as they last longer and do not require the constant topping up like lead acid batteries. In fact it is better to not fully charge lifepo4 but keep them in a lower range.
The initial outlay of Lifepo4 and their unforgivingness of over or undercharging are the downsides which keep so many of us stuck on lead acid.
There are many considerations with Lifepo4.
I could relate what i have read, but it is much better to get information from a person with actual experience with setting up, AND actually cycling Lifepo4. Not just read about it.
Two members here that I know of use them, Blars and Oberneldon. The latter links more info in post 15 of this thread:
https://vanlivingforum.com/Thread-Lifepo4-batteries?page=2
If you wanted to stick to lead acid, you can get individual batteries with capacities over 250AH, but they weigh a ridiculous amount and are hard to move.
If 300AH was a much more desirable goal than 224( 1 pair trojan t-105), then the trojan t-1275 is one of the only true 12v deep cycle lead acid flooded batteries. Get 2 for 300AH.
If AGM's are more desirable to you, the 12v Lifeline GPL-30HT is also 150AH.
The lifeline AGm can also accept huge charging amperages without issue, and is better off for it.
These batteries are a bit taller. AGM batteries like lifeline and Odyssey and Northstar are all top$$ top quality AGM that can take as much charging current as you can throw at them, but they need not only this occassional high amp blast, but also the true full recharge more often and more so than a true deep cycle flooded battery.
Lesser$$ AGMs instructions say recharging amperage is be limited to 30 amps charging current per 100AH of battery capacity. Not really an issue with 300AH of capacity.
Also of mention is the Oasis firefly battery. Only one size available, group 31, 115 AH. These batteries are 482$ each, and supposedly can be returned to full capacity with a proper duration recharge, after many partial state of charge cycles and never reaching full charge. The PSOC cycling is very hard on regular lead acid batteries. Flooded or AGM. PSOC = Partial State of Charge cycling.
The Oasis Firefly is relatively new. There are glowing reports. I am waiting on the fence, personally.
One member here owns one, and did not understand the 'conditioning' procedure. Instead of quickly draining the battery to dead and instantly recharging to full, they slowly overdepleted it beyond dead over a period of days, and then fully charged it low and slow over a few days via solar. The battery freaked out but last report was everything was back to normal with it despite this rather extreme abuse that would likely kill many other batteries.
Still on the fence but hope they can do as they claim.
One can put as many batteries in series and or parallel for as much storage capacity as they desire/care to carry. Quality Balanced wiring becomes more important with more batteries.