At no point do you actually say what was wrong about what you quoted. What do you feel is in error?
>GWh is static energy (or simply - energy). GW is energy moving from point A to point B, which is power.
Yes, obviously. This is HN. Generally it pays to assume that people know what they are talking about around here.
It may be that you don't care about the power rating of the storage instance, but a utility does! They care about the power rating just as much as the total storage amount, as they are both essential design parameters. Particularly in the case of lithium ion, since many applications use discharges or charges less than an hour long (lithium ion batteries are typically designed with a W:Wh ratio of 1:1 - 1:4).
The original article is citing a market report from IHS Markit. Now, I can't find the particular news release for this one, but IHS Markit uses both terms GWh and GW when talking about storage, and as market researchers if they were messing that up it would be a worthless report. So lets look at one of the recent reports:
> This was largely a result of over 100 MW of projects being completed and commissioned in California in early 2017 as part of Southern California Edison and San Diego Gas and Electric’s response to the Aliso Canyon gas leak.
>(CPUC) expedited the approval of around 100 megawatts of energy storage in Southern California Edison and San Diego Gas & Electric territories, in response to the Aliso Canyon blowout.
>Tesla, Greensmith Energy and AES Energy Storage celebrated the completion on Monday of three large-scale lithium-ion battery projects totaling 70 megawatts -- consisting of 20 megawatts, 20 megawatts and 30 megawatts, respectively.
Now, here all megawatts! And the mean it, because these the AES batteries were 37.5MW and 150MWh, and the Tesla battery is 30MW and 80MWh:
So yes, they mean GW and not GWh, and yes, that is a very meaningful statistic when talking about the grid. It's not the only one, and for bystanders, maybe they care about the Wh more than the W, but it's not like you can design a system without known both.
It is obvious from epistasis' comment that (s)he is fully aware of the difference between power and energy, and also that both are relevant properties to consider when designing an energy storage system.
At no point do you actually say what was wrong about what you quoted. What do you feel is in error?
>GWh is static energy (or simply - energy). GW is energy moving from point A to point B, which is power.
Yes, obviously. This is HN. Generally it pays to assume that people know what they are talking about around here.
It may be that you don't care about the power rating of the storage instance, but a utility does! They care about the power rating just as much as the total storage amount, as they are both essential design parameters. Particularly in the case of lithium ion, since many applications use discharges or charges less than an hour long (lithium ion batteries are typically designed with a W:Wh ratio of 1:1 - 1:4).
The original article is citing a market report from IHS Markit. Now, I can't find the particular news release for this one, but IHS Markit uses both terms GWh and GW when talking about storage, and as market researchers if they were messing that up it would be a worthless report. So lets look at one of the recent reports:
https://technology.ihs.com/590967/global-battery-energy-stor...
and one easier to check number:
> This was largely a result of over 100 MW of projects being completed and commissioned in California in early 2017 as part of Southern California Edison and San Diego Gas and Electric’s response to the Aliso Canyon gas leak.
Let's look at this other report on that 100 MW:
https://www.greentechmedia.com/articles/read/aliso-canyon-em...
>(CPUC) expedited the approval of around 100 megawatts of energy storage in Southern California Edison and San Diego Gas & Electric territories, in response to the Aliso Canyon blowout.
>Tesla, Greensmith Energy and AES Energy Storage celebrated the completion on Monday of three large-scale lithium-ion battery projects totaling 70 megawatts -- consisting of 20 megawatts, 20 megawatts and 30 megawatts, respectively.
Now, here all megawatts! And the mean it, because these the AES batteries were 37.5MW and 150MWh, and the Tesla battery is 30MW and 80MWh:
http://www.utilitydive.com/news/inside-construction-of-the-w...
So yes, they mean GW and not GWh, and yes, that is a very meaningful statistic when talking about the grid. It's not the only one, and for bystanders, maybe they care about the Wh more than the W, but it's not like you can design a system without known both.