Gordon-Loomberah wrote:As for all reasonably sized off-grid installations, I think you would be better off getting individual cells rather than 12V batteries - less expense to buy, and also less expensive to replace a bad cell, which can't be done with the pre-assembled battery.
Gordon-Loomberah wrote:I haven't checked prices or suppliers lately, but an internet search should bring up a few, including some EV suppliers.
Generally 12V Lithium batteries are not really suited to running in series, as you can't access individual cells for balancing. Each 12V battery will have a set of 4 matched cells in it, and it is considered that they wont need balancing under normal use. Add another 12V battery in series with cells of slightly different capacity cells, and I think you will eventually have balancing problems.
Internal cell balancing
Can be used in series or parallel
APR wrote:You can buy 16 X 3.2v 200 Ah capacity LiFePO4 cells with balancers, the cells clamped, and in a frame mounting system with a protective top cover for $6,000. Add something like a Victron BMV-702 BMS which gives SOC and provides a high and low voltage cutout as well as a battery mid point voltage out of balance cutout when actuating an appropriate relay between the battery and inverter.
I only want 100ah, but where did you find the cell price?
dRdoS7 wrote:Cost is AU $3,492.27 delivered to my door, in 6 days!
I would still need to buy a BMS & relays.
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