Remix clone Hacker News

Weight is not a factor for home energy storage, there is no need for lithium cells.

That depends on your living situation. I live in a third-floor apartment, so weight is very definitely a factor.

bmicraft 2 days ago | parent | next [-]

Weight always is a factor since heavy batteries cost more to transport, period. It's always relevant, not least for the installation too.

	▲	dheera 2 days ago \| parent [-]
		We're talking on the order of millions of kilograms for the building materials that needed to be transported to build it. The batteries needed for backup power for its occupants won't come anywhere close to that, even at far lower energy density than lithium.

dheera 2 days ago | parent | prev [-]

The apartment building can have unified power backup in its foundation/basement.

If you reduce the energy density by a factor of 10, the weight for power backup needs will still be far lighter than the concrete.