This is where i got the link from and information on those packs.
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Good video review on those cells. I’ve seen this guy’s DIY powerwall videos. I guess I’d have to really think about used cells vs bulk new ones if I was doing a hugely paralleled battery like a powerwall. I’ve never really priced new cells in bulk.I’d just hate to put in a ton of work and have problems with it but those look like pretty good cells. And if you run them conservatively then they probably have pretty good life left in them.
But I just did a quick search and I’m not finding any great deals on bulk new cells - some are $6 each. That makes a new powerwall from Tesla sound like a good deal at $350 per KWH.
I use 10 WH per cell in my calculations. So the powerwall is around $3.50 per cell. Plus it’s already built and includes power management and battery management.
However, I’d probably take a chance on a DIY one myself some day.