Energy storage systems are already being sold around the world to utilities and to homeowners with rooftop solar. However, studies suggest that long-duration energy storage on the scale of days or even weeks, will be necessary to address the seasonal variation of expanded renewable generation. On February 24, OurEnergyPolicy held a webinar examining this issue and featured a panel of experts discussing the potential industry impact of various energy storage technologies, as well as relevant policies. If people need shower regrouting melbourne , they can check
While “resource adequacy” is currently defined as four hours of storage by some, panelists suggested that the industry is moving towards eight-hour, multi-day, or even seasonal storage. Though California defines “long duration” as ten hours, panelists noted that roughly two-thirds of outages last longer than this. While storage needs are a function of generation mix and the specific climate of a location, panelists were generally of the opinion that week-long or multi-day storage is where the industry is headed. As panelists discussed, a capacity of roughly 200 hours would have been required to meet the needs of ERCOT during the recent extreme weather events in Texas. If people need the best shower regrouting melbourne, they can check here and find out!
The conversation ended with a discussion of necessary policy elements to support greater deployment of long-duration energy storage. “Policies must be technology agnostic” was a leading suggestion. Requests for Offers (RFOs), such as the one initiated by community choice aggregations in California, must specify parameters and allow the market to decide and develop what is needed. To this end, panelists also expressed a desire for more precise definitions of terms such as “Reliability.” The final suggestion was for regulatory certainty, which would encourage companies to more readily invest in new approaches.
1) What other types of policy support do you think long-duration storage needs?
Any policy that works to phase out GHG emissions will work to encourage long-term storage and long-term storage equivalents such as demand-response, local generation, and long-distance transmission. A carbon tax… Read more »
The market and politics with respect to energy, are inexorably linked one to the other. Without an energy strategy based on science and economics, we are in danger of investing… Read more »
Current policies make variable renewables parasitic on fossil fuels. VRE resources deliver energy “as available”, but we expect the grid to deliver power on demand. There is a substantial cost… Read more »
2) What do you see as the greatest potential application of storage technology?
The greatest potential in the near term is in what I’d call medium duration storage. That’s storage that cycles daily, with sufficient capacity to meet daily peaks and overnight loads… Read more »
A well designed grid network with load following utilities make more sense both with respect to cost and reliability. Nuclesr is the key component of such a strategy.
I agree, Unfortunately, nuclear still faces strong headwinds in the PR department. New nuclear still has excessive lead times for development and approval. And the question was about storage. Diurnal… Read more »
3) What do you see as the most promising storage technologies?
Discussions of energy storage tend to focus on the most ubiquitous technology — lithium-ion batteries. There are two good reasons: they have proven reliability and they provide low-mass high-energy density… Read more »
Too many possibilities to call. Flow batteries with very low cost electrolyte solutions are promising, but there are new forms of pumped hydro, CAES, gravity storage, and enhanced geothermal that… Read more »
They also relieve the need for wind and solar, oh and by the way they operate 24/7 92% of the time. Maybe utility scale wind and solar are the wrong… Read more »
You won’t get an argument from me about utility scale wind and solar being the wrong strategy. It’s not even their intermittency that bothers me most about them. It’s their… Read more »
Hydrogen, it’s a gas
The best long term storage to backup wind and solar is hydrogen. Not only can it be converted back to A.C., but it can be marketed as transportation fuel, and… Read more »
Well, there I demur. It’s viable for long term storage, and it certainly does have other uses. But it’s low round-trip efficiency for storage is a serious limitation. If we… Read more »
But hydrogen is so cheap to produce and cheap to store that it compensates for the poor transform efficiency. I’m not sure what the “non CO2 impact” you refer to… Read more »
By “non-CO2 impact” I mean the full set of environmental impacts associated with wind and solar resources. Once they’ve been built and deployed, wind and solar have no CO2 emissions,… Read more »
The Gallery of Clean Energy Inventions is linked at https://app.box.com/v/CLEANENERGYEXHIBIT. The Gallery of Clean Energy Inventions exhibits profiles of 25 Larger Generators, 34 Smaller Generators, 26 Advanced Self-Powered Electric Vehicle… Read more »