this post was submitted on 15 Aug 2023
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Cheap UPS solution? (feddit.nl)
submitted 1 year ago by lnxtx@feddit.nl to c/selfhosted@lemmy.world
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I'm tired of buying a new 12 V battery every 1-2 years. I have about 4 small (rated ~ 300 W [not VA]) UPSes with 7 Ah, 12 V, maintenance free batteries.

I'm thinking about replacing them with one, powerful unit. But the more powerful the unit, the more it costs - non-linear.

Do you have experience with some DIY solutions? Like 12V DC to 230V AC inverter, battery charger, some UPS controller (simple relay?)?

Or maybe you have some other idea that is cheap(ish)?

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[–] carl_dungeon@lemmy.world 13 points 1 year ago (12 children)

I have a few cyber power 1000W/1500 VA units. They go on sale for under $150 now and then. Best price/power ratio I’ve found. The battery in one has lasted at least 6 years, other is going strong for at least 2. They’re big enough to power my 8 bay NAS for a couple hours. I don’t recommend DYI for a UPS, too unreliable.

[–] housepanther@lemmy.goblackcat.com 8 points 1 year ago (1 children)

Not only is a DIY UPS unreliable, but it could be potentially dangerous unless you are an electrician, an electrical engineer, or somebody that has extensive knowledge of both the engineering side and safety side. How many CyberPower units do you have? It's impressive that you have enough UPS power to run a NAS for that long.

[–] carl_dungeon@lemmy.world 3 points 1 year ago (2 children)

I have 3 - but I get that runtime out of one of them. Depends on load, but idle the nas doesn’t draw too much.

[–] housepanther@lemmy.goblackcat.com 1 points 1 year ago (1 children)

What is your NAS? Is it something you built or a Synology?

[–] carl_dungeon@lemmy.world 2 points 1 year ago (1 children)

Synology- Synology 8 Bay NAS Diskstation... https://www.amazon.com/dp/B07KMKDW42?ref=ppx_pop_mob_ap_share

[–] housepanther@lemmy.goblackcat.com 1 points 1 year ago

Ah, I thought as much because they're really power-efficient unlike something DIY.

[–] Telodzrum@lemmy.world 1 points 1 year ago (1 children)

What’s the chip in that NAS?

[–] carl_dungeon@lemmy.world 1 points 1 year ago (1 children)

Quad core atom I believe

[–] Telodzrum@lemmy.world 1 points 1 year ago

That makes a lot of sense. Great low power chip.

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