I have a modest set of solar panels on an entirely ordinary house in suburban London. On average they generate about 3,800kWh per year. We also use about 3,800kWh of electricity each year. Obviously, we can't use all the power produced over summer and we need to buy power in winter. So here's my question: How big a battery would we need in order to be completely self-sufficient? Background …
Hoover Dam does generate power, but it’s not an energy storage project to time-shift intermittent clean energy generation to match grid consumption
All hydro is automatically “time shifting storage” when new solar is added to power the daytime. Just turn on the turbines at evening peak full blast, and at night. Average global capacity factor of hydro is 45% because the water reservoir is not sufficient to go full blast 24/7/365. Obviously, hydro time shifting is also highly complementary to wind.
Hoover dam’s water release schedule is driven by requests from water rightsholders further downstream. Power generation is great, but the dam’s primary design purpose has always been facilitating agricultural irrigation.
That said, I bet you’re right that the water flow rate could be varied throughout each day to help balance electric grid needs. I assume that will likely come into play as we get further along the path to intermittent green power generation.
Flooding levels updam is a concern (but not for Hoover) in general. Yes, daily/weekly flow rate downstream is also a concern. But not hourly flow rate.
All hydro is automatically “time shifting storage” when new solar is added to power the daytime. Just turn on the turbines at evening peak full blast, and at night. Average global capacity factor of hydro is 45% because the water reservoir is not sufficient to go full blast 24/7/365. Obviously, hydro time shifting is also highly complementary to wind.
Hoover dam’s water release schedule is driven by requests from water rightsholders further downstream. Power generation is great, but the dam’s primary design purpose has always been facilitating agricultural irrigation.
That said, I bet you’re right that the water flow rate could be varied throughout each day to help balance electric grid needs. I assume that will likely come into play as we get further along the path to intermittent green power generation.
Flooding levels updam is a concern (but not for Hoover) in general. Yes, daily/weekly flow rate downstream is also a concern. But not hourly flow rate.