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  • Garry Sandeen

    Member
    April 30, 2022 at 8:00 am

    This is huge point for .net /gear heads.

  • Garry Sandeen

    Member
    April 29, 2022 at 3:51 pm

    Hi Peter, I have 4 205 amp hour SOK batteries, so 13.6v x 820 amp hours = 11,152 watts . When fully charged I see 12,040 watts on the display and that’s the metric usually watch as the batteries get depleted. I charge these with 3 24V MPPT 40 amp solar charge controllers. I also have 24v 37 amp and 50 amp AC chargers. This is enough power to run my 32″ TV, media server, 24v compressor refrigerator, and furnace for a week no problem without sun. I still have to add more solar panels as the goal is 24×7 AC with a mini split. These are awesome but lifepo4 batteries have water in them and if you push the angry pixies the wrong way when it’s frozen they are toast. Maybe there new tech that allows these cells to charge when frozen but I’m guessing the BMS has a circuit to put a load on the battery to warm it up.

    As far as the cells used in the Aptera pack, if the information that I have is correct the INR21700-50E cell shows a charging range of 0 – 40C. It’s up to the BMS how it charges, when it charges, and when it doesn’t charge. I wish I could see the parameters they are using. It’s not uncommon for it to be -15F in my garage in Jan. Hell it was 25F Monday

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