3 ms·
Interestingly, if my calculations are correct, a 1kWh car lead acid battery costs $80+tax retail - https://www.autozone.com/batteries-starting-and-charging/batt
by hippich 5y ago
Interestingly, if my calculations are correct, a 1kWh car lead acid battery costs $80+tax retail - https://www.autozone.com/batteries-starting-and-charging/battery/econocraft-battery-h6-e-group-size-48-615-cca/811871_0_0 https://www.autozone.com/batteries-starting-and-charging/bat...
Obviously, besides batteries, you need other components to transmit, convert, etc electricity, yet the difference is quite large.
I guess question becomes - how much it will cost to maintain such cryogenic storage solution vs replacing lead acid batteries over time.
EDIT: while shopping for a used UPS unit for my server rack, with expectation that the unit itself will come without batteries and I will purchase new batteries separately, I was getting about $125-$150 per kWh for everything, including UPS itself and a set of new batteries.
I am not proposing to use used tech to build such a storage, just interesting to look at prices.
- AYBABTME 5y agoLead acid has a very poor cycle life and poor round trip efficiency as well. Also, its advertised capacity isn't usually reachable even at very low C rates. biased/sponsored test but still casually informative test of actual lead-acid performance: https://youtu.be/iy3hga_P5YY https://youtu.be/iy3hga_P5YY
- justshowpost 5y agoBesides inefficient chemistry remark above, car batteries classified as high-discharge as opposed to deep-cycle. We need the latter for energy storage. If you'd like to assess the cost of lead-acid, check out «marine» batteries instead. PS: lead-acid is very dull at self discharge.
- tgtweak 5y agoUsing Tesla's own numbers for a turnkey installation such as this. Costs will probably come down another $50-80 per kWh with improvements in battery costs.