Batteries have shaped up, actually! Retail costs are about $300/kWh for at least 7000 cycles, which is only $4.2/kWh (plus inverter/BMS, plus electrician costs,

Batteries have shaped up, actually! Retail costs are about $300/kWh for at least 7000 cycles, which is only $4.2/kWh (plus inverter/BMS, plus electrician costs, plus sales markup, etc.). There has been a 10x decline in lithium ion battery costs in just 10 years, which is shocking. Check out this slide from Ramez Naam, of which batteries are only one component of the massive ongoing transition: https://t.co/2WnIrtuLpN https://t.co/2WnIrtuLpN Lithium ion batteries are getting deployed in large GW and GWh sizes all over, and in smaller sizes too. Worldwide production capacity is expected to grow by 10x every five years. I think other stationary battery chemistries will catch up for "longer-term" storage, where the charge rate is lower and the capital cost is lower, and they can't cycle as fast. My favorite are the iron air batteries, which are rumored to be as low as $20/kWh, but with a power/energy ratio of only 1%.