2 ms·
It's a good question, but when discussing grid energy storage, there are 2 important things: 1. How much power output the storage can replace (i.e. discharge c
by hn_throwaway_99 2y ago
It's a good question, but when discussing grid energy storage, there are 2 important things:
1. How much power output the storage can replace (i.e. discharge capacity) . The appropriate unit for that is watts (or megawatts, etc.)
2. How long can it do it for (i.e storage capacity) - as you point out, the appropriate metric for that is megawatt-hours.
- zidel 2y agoAnd to add to that, power is almost always the number that is reported/counted so watts is usually correct. That might seem strange since batteries store energy, but in terms of the service they provide to the grid power in/out is more important than storage at least for now. Edit: 1-2 hours of storage seem to be the current state in Texas at the moment: https://www.renewableenergyworld.com/energy-storage/texas-continues-to-break-battery-energy-storage-records/ https://www.renewableenergyworld.com/energy-storage/texas-co...
- timerol 2y agoIt's worth noting that for 2, projects are generally quoted in just "hours", with the storage capacity in MWh implied