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That's 600 MWh for 257 million USD. Tesla's powerwall has 10 KWh for 3500 USD. Interestingly, that's about the same price point. Efficiency-wise, the centraliz

by Hermel 11y ago

That's 600 MWh for 257 million USD. Tesla's powerwall has 10 KWh for 3500 USD. Interestingly, that's about the same price point. Efficiency-wise, the centralized Japanese solution makes probably more sense for large centralized solar plants, whereas Tesla's model probably makes more sense for self-owned solar panels.

Retric 11y ago
Upfront costs might be similar though this includes total costs (Land, installation, AC-DC converter, etc) where the tesla does not. However, efficiency is probably higher and the matence costs are probably far lower. PS: The tesla battery actually claimes an 'inflated' effecency level (92%), by not including inverters, though as it's designed for DC solar systems that may be reasonable.
Jedd 11y ago
I gather that Tesla's model is also targeted at people who may also wish to start storing power they buy off the grid at times when the cost is lower (as well as from locally generated solar, turbines, etc). Price point commonality may be more coincidence than anything else. There's a philosophical question in there for some (probably small) number of customers -- whether they wish to remain beholden to vendors of electricity, at whatever rate is determined by the vendor at the time.
greglindahl 11y ago
Which Tesla model? There are 2: the Powerwall for home use, and the Powerpack, for businesses. The Powerpack starts at 100kWh, and goes as big as you have money for. Initial reservations are mainly for the Powerpack. https://en.wikipedia.org/wiki/Tesla_Powerwall https://en.wikipedia.org/wiki/Tesla_Powerwall Grid storage that stabilizes a grid is much more valuable than storage of power to shift production to non-peak times.
- seunosewa 11y ago
  Whats the difference between stabilizing a grid and storing power produced at non-peak times so you can use it at peak times?
  - toomuchtodo 11y ago
    One is much more profitable, because it requires much faster response times.
- icanhackit 11y ago
  Grid storage that stabilizes a grid [...] Your comment made me think - what if a state-power or hacker group were able to make a large number of these energy storage units dump their energy back on the grid en mass? Would there be ways to protect the grid from being overloaded by a centralized energy store dumping its energy?
Thiz 11y ago
With ten billion dollars we could have one million houses with solar roofs and powerwalls, a whole city unplugged. I'd like to see government invest in a project like that. I believe distributed generation is the future.

by Hermel 11y ago

Retric 11y ago

Upfront costs might be similar though this includes total costs (Land, installation, AC-DC converter, etc) where the tesla does not. However, efficiency is probably higher and the matence costs are probably far lower. PS: The tesla battery actually claimes an 'inflated' effecency level (92%), by not including inverters, though as it's designed for DC solar systems that may be reasonable.

Jedd 11y ago

I gather that Tesla's model is also targeted at people who may also wish to start storing power they buy off the grid at times when the cost is lower (as well as from locally generated solar, turbines, etc). Price point commonality may be more coincidence than anything else. There's a philosophical question in there for some (probably small) number of customers -- whether they wish to remain beholden to vendors of electricity, at whatever rate is determined by the vendor at the time.

greglindahl 11y ago

Which Tesla model? There are 2: the Powerwall for home use, and the Powerpack, for businesses. The Powerpack starts at 100kWh, and goes as big as you have money for. Initial reservations are mainly for the Powerpack. https://en.wikipedia.org/wiki/Tesla_Powerwall https://en.wikipedia.org/wiki/Tesla_Powerwall Grid storage that stabilizes a grid is much more valuable than storage of power to shift production to non-peak times.

seunosewa 11y ago
Whats the difference between stabilizing a grid and storing power produced at non-peak times so you can use it at peak times?
- toomuchtodo 11y ago
  One is much more profitable, because it requires much faster response times.
icanhackit 11y ago
Grid storage that stabilizes a grid [...] Your comment made me think - what if a state-power or hacker group were able to make a large number of these energy storage units dump their energy back on the grid en mass? Would there be ways to protect the grid from being overloaded by a centralized energy store dumping its energy?

Thiz 11y ago

With ten billion dollars we could have one million houses with solar roofs and powerwalls, a whole city unplugged. I'd like to see government invest in a project like that. I believe distributed generation is the future.