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[Request for Recommendations] 1U-4U Uninterruptible Power Supplies (lemmy.inbutts.lol)

submitted 2 years ago by shnizmuffin@lemmy.inbutts.lol to c/homelab@lemmy.ml

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I recently stated out loud that my homelab was stable, and now my UPS is posting less than 30 minutes of estimated normal load. What's everyone using as a UPS?

I've been rocking the aptly-named CyberPower OR1500LCDRT2U for the past few years. Should I just replace the cells or upgrade the whole unit?

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[–] poVoq@slrpnk.net 2 points 2 years ago (2 children)

Probably just a case of replacing the batteries, but if you want to think out of the box: there are some hybrid inverters for solar systems that offer a UPS mode. So you could combine a home solar system with modern lithium batteries with your homelab needs for a better UPS.

[–] shnizmuffin@lemmy.inbutts.lol 8 points 2 years ago

This is the $10k solution to the $100 problem I was looking for, thank you for the idea.

"My dear significant other, the server's battery backup is dying -- I'll be on the roof."

[–] e_t_@kbin.pithyphrase.net 2 points 2 years ago (1 children)

The primary concern is switchover time. A purpose-built UPS can switch in about 10 microseconds. Those large "solar generator" battery packs switch in about 30 microseconds. That might be fast enough, but it's not guaranteed to be fast enough like a UPS is.

[–] poVoq@slrpnk.net 2 points 2 years ago* (last edited 2 years ago)

Well, if that is really a concern, you can keep the old UPS with not so good batteries still connected to cover that 20 microseconds difference.

But it is unlikely to matter in a homelab.