3 ms·
The system bring talked about here can deliver 250kW during 11 seconds max. That is LESS than 1 kWh of energy storage. I hope it's not the one on the picture
by joss82 5y ago
The system bring talked about here can deliver 250kW during 11 seconds max.
That is LESS than 1 kWh of energy storage.
I hope it's not the one on the picture otherwise their cost estimates are way off and two orders of magnitude larger than current lithium batteries, even taking into account battery replacement.
Another problem would be the ever-lowering price of batteries comparing unfavorably against this good old tech with stable or raising costs (human costs tend to rise over time)
- nixpulvis 5y agoI had the same thought. They do make it clear that this is a demonstration, but I'm curious how this scales with larger weights and heights; both in capital cost, and efficiency. I'm also curious if anyone's seen a good comparison to hydro/dam based gravity batteries? Or even to the gimmicky sounding electric train based ones I've read about before? My understanding is that anything near or past 90% efficiency gets very hard to achieve, but perhaps there are special cases where this isn't true? Finally, I'm also curious how these compare to flywheels, which offer a similar style of energy storage, but with rotational potential instead of gravitational. Storage is clearly one of the largest barriers to large scale adoption of many renewable sources of power we have. And, chemical batteries raise a lot of valid concerns in terms of safety and environmental impact.