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FWIW, LiFePO4 buddy pack, split in 3 12 cell units each with their own BMS, has been waiting further developments for a couple of years now.
Once a year I check on them, and they charge for a minute or so before they max out.
There is virtually no draw whatsoever from their BMS.
My 12Ah cells are good for 10C (120 Ampere) during 30 seconds.
The BMS limits output to 55 Ampere, and completely cuts off power when the current rises above 55 Amp, the temp sensor on the BMS exceeds 90 Celsius or any cell gets out of range (above 3.85 Volt, below 2.something).
It also has passive top bleeding to 3.65 Volt.
So far I'm very pleased with how it works out.
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2011 Honda Insight + HID, LEDs, tiny PV panel, extra brake pad return springs, neutral wheel alignment, 44/42 PSI (air), PHEV light (inop), tightened wheel nut.
  lifetime FE over 0.2 Gmeter or 0.13 Mmile.
For confirmation go to people just like you.
For education go to people unlike yourself.
Last edited by RedDevil; 06-21-2018 at 09:51 AM..
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