ramseyjack
been around a day or two
I have come across 32, pretty much dead (below 1.2v, many at .101V) Princeton GTB-30 battery packs. (I know this is training, not any expectation). A couple of them were at 21.39v so I have been very careful at charging them SLOWLY with less than 4 amps and up to only 23.3v. Did get around 2-3KW out of them (SLOWLY discharging at 13amps before the 19V cutoff).
1 produced 250W, 2@ 2KW, and 1 @3KW before the 19.2 cutoffs. (see attached Cerbo GX logs)
Obviously, this is just a training exercise for myself and my technical staff, Have been installing off-grid and all kinds of solar the last 17 yrs, and prismatic cells make so much more sense than these, but I was thinking of using the few good ones for TOU arbitrage (SCE 4-8pm electricity is .56 per KW) example-test bench. Have been doing arbitrage with Solaredege for years, but trying to get everyone on my staff to think batteries.
Been using Hanmatek DC power supply so far, but time-consuming. I know I can use a Victron MPPT DC charge controller to keep the voltages below their dangerous 25V, and my Victron Blue Smart IP67 (AC) won't go below 25.6V (OOPS)
So does anyone know of a reasonable charger that I can program to the 24.4V and 24v float that is AC?
Thanks !!!
Jack Ramsey
1 produced 250W, 2@ 2KW, and 1 @3KW before the 19.2 cutoffs. (see attached Cerbo GX logs)
Obviously, this is just a training exercise for myself and my technical staff, Have been installing off-grid and all kinds of solar the last 17 yrs, and prismatic cells make so much more sense than these, but I was thinking of using the few good ones for TOU arbitrage (SCE 4-8pm electricity is .56 per KW) example-test bench. Have been doing arbitrage with Solaredege for years, but trying to get everyone on my staff to think batteries.
Been using Hanmatek DC power supply so far, but time-consuming. I know I can use a Victron MPPT DC charge controller to keep the voltages below their dangerous 25V, and my Victron Blue Smart IP67 (AC) won't go below 25.6V (OOPS)
So does anyone know of a reasonable charger that I can program to the 24.4V and 24v float that is AC?
Thanks !!!
Jack Ramsey
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