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I have 650 amp-hours of LiFePO4 batteries in a 12 volt bus on my sailboat. The batteries have been in storage for four years, and my last capacity test conducted a year ago showed a 2% loss of capacity (they originally tested at about 2% above rated capacity, so now they are at factory spec.)...

Correct. The upper voltage per cell cutoff threshold reverts to 4.2 volts as opposed to 3.65 volts. 4.2 volts will, at the very least, ruin LiFePO4 cells.

The user community following the Off-Grid Garage forum has discovered a serious problem with a model of the JK BMS that could result in catastrophic battery failure. Details are here: Major safety concern with new JK Inverter BMS! Not good. For those of you who aren't familiar with Andy's sense...

Nice. Those look like at least 1 watt resistors. Dissipation shouldn't be more than 0.17 watt (3.65 volts squared / 77 ohms). They didn't skimp on the rating!

Something BB also fails to mention is the importance of charge termination detection. Charging a single 100 AH battery to 14.2 volts (3.55 volts per cell group - assuming perfect cell balance) should be halted when the charge current declines to about 3 amps (in a parallel battery group...

> Did they screw up writing the manual? Yes.

My own site? I don't have a site. Please read postings more carefully before flaming people who are devoting their unpaid time to help out. The trolls seem to be everywhere! I'm outta here. This site is infested.

Yeah, I always get flamed when I post actual research that contradicts fanboys.