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I moved mine to the basement for this reason. It will be their final resting place anyway, so we don't have to deal with negative temperatures in the garage. Wasn't ready to add a mini-split to this whole cost just yet.
Did I understand correctly that those modules are 20 cells in series? That is a nominal 64 volts and 70 volts or more when charging. Unless you plan on separating four cells from each module it will be difficult finding an inverter that will run at that voltage. My apologies if that was covered in the video, or in another post.
Correct, but separating four from each and combining those to make a fifth 16s pack.
On further reading I see that you explained that earlier. I made my comment only after reading the first few posts and did not realize the thread was longer. My pack is 42kWh in a 3P16S configturation. I have an expensive BMS and therefore saw no value in having three BMSs and separate packs. My cells are not Automotive grade and buddy pairing them gave me consistent results between each of the three cells in each buddy pair. My cells were added incrementally and that was another reason I preferred a single pack. My cost averaged about $116 per kWh because I purchased some of them three and a half years ago when I just joined this forum.
Did you start as 16S then go 2P then 3P?
Yes I started 16S at another home. Then we sold that and after buying new home I bought more cells and went to 3P. It is way more capacity than I need on a daily basis but we have some multiday power outages so I wanted the backup.
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Yes, it seems if you turn off or disconnect the BMS for a few days it reverts back to default settings which if they differ from your original settings could be a problem.
seems to me a number of the the default JK settings have basic problems, like low voltage cut off of neg 20c, and high voltage cut off per cell of 4.2v
Wondering if that's a firmware issue.
