alt Hacker NewsFor something like a battery backup that last decades that doesn't need maintenance, maybe you could bury it out of the way (like under a deck or lawn?), maybe even under the frost line.
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someothherguyy • today at 2:13 AM
might need to be in some special containment at that size, depending on the technology -- some sodium ion battery implementations are very toxic / highly reactive / flammable.
Underground is a big problem with it comes to water permeation and flooding.
The other potential problem with a lot of energy systems that use things that have hydrogen in them is running power over the systems for long periods of time can start to leak hydrogen. You'll always want to ensure you have ventilation to ensure whatever is outgassing can escape the system. You'll end up with explosions, hydrogen embrittlement, or interesting corrosion in ways you didn't think were possible.