Thanks so much for the great info. Batt
eries are 3.5yrs old. What batteries should I replace them with? Lithium is out of my price bracket....i love shoes
EDIT: The voltage info you posted doesn't mean your batteries are dead, it sounded normal if you had loads running on your inverter. If you get a battery monitor, it will be able to tell you if you're still getting 50% usage of your battery bank. Then you can make a more informed decision on battery bank replacement?
You current battery bank is 6.4kwh usable (discharged to 50%)...
The cheapest option is costco 6V GC2s, around $100 per cell, you can make a 48V 200AH bank for $800, and you'd need to add 4 identical battery wires for the 1 string of 8 6V batteries setup, which is 5kwh usable bank size (10kwh overall). Doubling that to $1600, or maybe $1800 with additional battery wires, it would get you a 2 string battery bank, 10kwh usable bank size (20kwh overall). You'll need to add distilled water to these batteries every few months, and depending on how hard you use them, they'll probably last between 1yr and 5yrs. You also need the space to hold 8 or 16 cells for this option.
I assume replacing your AGMs is more expensive than the option above, but how much more expensive? More expensive than the LiFePO4 option below?
5kwh of LiFePO4 is $1500+shipping (linked below), and it's probably going to last longer than the lead acid batteries, many people believe 2 or 3 times as long... These are one of the cheapest products, I use them and am happy with them. I have two battery packs but my 3000W inverters will start on one battery fine if I want to use them for a smaller system.
The EG4 LifePower4 Lithium Battery 48V 100AH provides reliable energy storage for server racks, ensuring uninterrupted power supply with its efficient and high-capacity lithium technology.
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