Island in the Sun(blog.solarcity.com)
blog.solarcity.com
Island in the Sun
http://blog.solarcity.com/island-in-the-sun/
2 comments
I think it would be interesting to read about the decision process that decided on the 1.4MW of power generation to 6MWh of storage ratio. This is around 1:4.2h.
Is this ratio very specific to Ta’u island, with their usage patterns, or can this ratio be used as a guide for future installations?
I'm guessing that Ta'u has not as much technology that stays on overnight, and a more realistic ratio would be 1:6h or more.
Anyway, this is a great proof of tech.
Anyway, this is a great proof of tech.
1.4 Megawatts (5328 solar panels) is from ~$4.3M to ~$7M[2].
60 Tesla Powerpacks (6 Megawatts/hour) is ~$8.7M[3]
So it's at worst a 50 year bet (if gallon's price doesn't increase) which is pretty good for a reliable continuous source of power.
[1]: https://www.wolframalpha.com/input/?i=how+much+is+109,500+ga...
[2]: http://www.freecleansolar.com/What-is-the-price-cost-for-a-S...
[3]: https://en.wikipedia.org/wiki/Tesla_Powerwall