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60% is great! That's much better than hydrogen, but still far from lithium. Let's hope the $/kWh is decent.
by arnaudsm 5y ago
60% is great! That's much better than hydrogen, but still far from lithium. Let's hope the $/kWh is decent.
- danans 5y agoIt's not quite lithium ion efficiency, but it serves a different duration energy storage market (up to 24 hours vs single hours for lithium ion battery storage), and it has a much longer service life (50 years), so the levelized cost of storage might be lower than lithium ion battery storage.
- sokoloff 5y agoThe lithium ion batteries in my car store energy for weeks on end with losses around 1-2% per week (after an initial couple percent rapid drop).
- danans 5y agoWhat I meant is that current grid scale lithium ion battery storage projects are designed for at maximum a few hours between charge and discharge. They are mostly for shorter window grid stabilization, not to store energy for days or weeks. LiIon grid scale batteries are still very expensive as a long term energy storage solution, they are sized to provide higher value grid ancillary services, like frequence regulation.
- thehappypm 5y agoEspecially when you consider that the use case here is surplus energy, like when the wind is blowing harder than can be consumed. Efficiency might not be so important if you’re buying free wind or solar energy, as long as it’s above some minimum threshold. 60% feels pretty good.