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Ten years is long. I'm pretty sure that Tesla is already buying them below that price right now for their China operation. Retail prices are of course a differe

Ten years is long. I'm pretty sure that Tesla is already buying them below that price right now for their China operation. Retail prices are of course a different matter. This market is supply constrained so unless you are negotiating hard for large volume orders, it's pretty hard to buy battery cells directly. That indeed might take ten years to get fixed. Anyway, you can buy some Tesla power wall for your home at quite steep prices right now. Considering the difference in price for that and their actual cost, margins on those might be very lucrative for Tesla right now. They charge as much as 8500$ for a 13.5 KW powerwall. If they source the batteries for 100$ per kwh, that's a nice markup.

rootusrootus 5y ago
At this point the cool kids on the DIY forums have worked out exactly how to build your own powerwall equivalent using LFP cells bought directly from China. It's enough of a savings to make it a worthwhile project.
- paulhart 5y ago
  do you have links for that?
  - rootusrootus 5y ago
    My personal favorite is DIY Solar Forum. I'm more into LFP batteries and solar for my RV than for my house, but here is a direct link to their DIY Powerwall subforum: https://diysolarforum.com/forums/diy-powerwalls.25/ https://diysolarforum.com/forums/diy-powerwalls.25/
- Baeocystin 5y ago
  As cool as that sounds in a certain sense, I would be shocked (no pun intended) if doing so wouldn't void one's homeowner's insurance. There's no way in hell I would put so much concentrated energy in an amateur pack anywhere near a home.
  - treeman79 5y ago
    Moved into a metal-rental house where the a prior owner did a lot of his own custom electric and hvac installation. About half a million in medical bills from that. So yea, keep it in the shed please.
    - ncmncm 5y ago
      What does this mean? Previous owner's medical bills? yours?
  - nicoburns 5y ago
    I think a lot of people are putting them in metal sheds in their gardens, which somewhat mitigates that risk.
- rodgerd 5y ago
  The cool kids who are a lot braver about their house burning down or local grid problems being blamed on them that I am.

rootusrootus 5y ago

At this point the cool kids on the DIY forums have worked out exactly how to build your own powerwall equivalent using LFP cells bought directly from China. It's enough of a savings to make it a worthwhile project.

paulhart 5y ago
do you have links for that?
- rootusrootus 5y ago
  My personal favorite is DIY Solar Forum. I'm more into LFP batteries and solar for my RV than for my house, but here is a direct link to their DIY Powerwall subforum: https://diysolarforum.com/forums/diy-powerwalls.25/ https://diysolarforum.com/forums/diy-powerwalls.25/
Baeocystin 5y ago
As cool as that sounds in a certain sense, I would be shocked (no pun intended) if doing so wouldn't void one's homeowner's insurance. There's no way in hell I would put so much concentrated energy in an amateur pack anywhere near a home.
- treeman79 5y ago
  Moved into a metal-rental house where the a prior owner did a lot of his own custom electric and hvac installation. About half a million in medical bills from that. So yea, keep it in the shed please.
  - ncmncm 5y ago
    What does this mean? Previous owner's medical bills? yours?
- nicoburns 5y ago
  I think a lot of people are putting them in metal sheds in their gardens, which somewhat mitigates that risk.
rodgerd 5y ago
The cool kids who are a lot braver about their house burning down or local grid problems being blamed on them that I am.