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On Tuesday, 13 September 2022 06:47:21 BST Thomas Mueller wrote: |
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> from Laurence Perkins: |
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> > Some of the higher-end UPS models do have diagnostic modes for simulating |
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> > various events to make sure the connected systems behave as desired. A |
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> > very few of the consumer-grade ones do as well. But how to do it is |
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> > model specific, so you'll have to dig up the documentation. |
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> > |
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> > Commercial-grade units also often have a DC port on the back so you can |
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> > plug in larger battery banks and/or hotswap battery banks during extended |
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> > outages. |
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> > |
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> > If you want an arbitrarily large battery bank, just get a decent power |
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> > inverter heavy enough to run your load and a battery float charger that |
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> > can push enough amps to keep up, then put as big a stack of batteries as |
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> > you like between the two. The nicer inverters will even warn you when |
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> > the batteries get low. |
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> > |
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> > You can often get used batteries from the local automotive shop for just |
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> > the core charge. Just because it can't provide 600 amps to start a car |
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> > any more doesn't mean it can't provide 60 to run your computers. |
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> > Obviously they'll require more regular maintenance, but it's hard to beat |
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> > the price. |
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> > |
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> > LMP |
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> |
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> How would you physically connect the automotive battery to the computer, and |
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> would you need the shell of the old UPS? |
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Yes, you need the *contents* of the UPS shell. It contains the rectifier to be |
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able to recharge the battery/batteries and the inverter to be able to feed the |
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PC from the batteries. |
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I've also used a car battery out of an old Mini to keep equipment running |
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during prolonged power outages. I connected it in parallel to the UPS |
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battery. After the power returned, almost two days later, I disconnected it |
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and recharged it with a car battery charger, which could take the higher |
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amperage. Trickle-charging should be OK via the UPS. |
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> I have an old Tripp-Lite UPS, batteries are dead and no longer rechargeable. |
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Why don't you replace them? They are not particularly expensive, although I |
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have not looked at UPS battery prices lately. |
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> Would you connect only the computer, or would you connect the monitor as |
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> well? Would you connect networking equipment? |
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> |
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> Tom |
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I connect modem, router, PC and monitor, so that whatever operation is taking |
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place it can be completed, applications running ended and the PC shutdown |
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manually. If the PC is running unattended when the power interruption |
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happens, eventually the upssched will shutdown the PC. |