3 ms·
* Pumped storage is hours of electric output * Battery storage is minutes of electric output Cold snaps and inversions (clouds are low, no wind, cold) are cou
by TheLoafOfBread 2y ago
* Pumped storage is hours of electric output
* Battery storage is minutes of electric output
Cold snaps and inversions (clouds are low, no wind, cold) are counted in days to weeks.
- adrianN 2y ago> You build electrolyzers New solar parks often come with a couple of hours of battery storage. You numbers seem to be out of date.
- TheLoafOfBread 2y agoNo they are not. It is either 30 minutes at MW range or hours at kW range. And countries are taking GW
- derriz 2y agoBattery storage systems generally provide 4 hours of full power output per daily cycle not minutes and are specifically designed to exploit the most typical daily demand cycle which has a 4 hour peak. You're mixing up the use of batteries for grid stabilization with their use for storage.
- TheLoafOfBread 2y agoGenerally more like 20 minutes.
- derriz 2y agoThat’s not true - the average storage duration for grid batteries used in non-stabalization roles is 4 hours - see https://www.eia.gov/todayinenergy/detail.php?id=51798 https://www.eia.gov/todayinenergy/detail.php?id=51798 and that’s from a few years ago. Since then the xMW, 4xMWh format has become almost universal.
- TheLoafOfBread 2y agoYeah with draw of few kW. If you would draw watts, it could last for months! But it might come as a shock to you, cities are taking in order of MW to GW
- derriz 2y agoI don't understand your point at all. A typical grid-storage battery will have enough storage to dispatch power at 100% of its rated capacity for 4 hours. Of course if you draw out the energy at less than full capacity, it will take longer to fully discharge. The largest battery currently in the US - Moss Landing - for example is rated 750 MW/3,000 MWh - which means it can sustain 750MW of output for 4 hours and it does this daily. This is not "20 minutes".