this post was submitted on 05 Mar 2022
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Feed into the electricity grid is the most efficient way ๐
But the real question is what the end use is going to be.
Yeah feeding back into the grid has the least conversion losses and doesn't take additional material.
Local energy storage can be useful though for complete self-sufficiency (at least in summer), but with the currently available options there will be no return of investment, both financially and environmentally, or they just don't have enough capacity/power to keep a family powered over night. I hope EV manufacturers will continue experimenting with using EV batteries as storage for solar power, it could be a nice combo for people who need a car.
I rather hope that there will be a large market for refurbished EV batteries in a few years that can be still used for stationary applications.
I doubt many people would want to shorten their car's battery life to run their washing machine with it.
Unless you build a DIY battery like this guy
he also has build a power-wall from recycled cells, which only costs a fraction and significantly improves the ecological footprint