[davidrm]

One would expect that a site dedicated to clean energy would know the difference between watts and watthours (i.e. power and capacity), on several occasions it claims that the capacity is X gigawatts instead of gigawatthours (GWh). It's hard to figure out what exactly is getting installed as the relation between the two is often different depending on the spec of the system.

[AndrewDucker]

The capacity of the connection they can saturate is in GW. The capacity they can store is in GWh.

Power generation is generally in GW, and if you're trying to work out how much demand you can satisfy, then that's what you want to know. If you're trying to work out how long you can satisfy it for then you want GWh.

[bryanlarsen]

It's even more confusing when those two numbers are the same which does sometimes happen. However, for grid storage it's more common for the GWh number to be 2-4x as large as the GW number.

[bee_rider]

If you follow the link on their site, the eia.gov site also reports the batteries in GW. They are consistent about this across their sites, so it isn’t an accidental error… but I can’t for the life of me recall why they do it this way.