Thread: UPS batteries

Originally Posted by weakestlink

Could I put a higher AH battery in?

Amps will be the same so the charge and discharge times will be longer.
I have a similar problem. UPS has failed. However, due to the physical size of the UPS, I'm having trouble finding a battery that will fit in the enclosure.

just spoke with UPSONIC (1800634307 they have almost any battery available but not as cheap as the online ones) They are calling me back about the AH charge capacity for my UPS

I had an interesting chat about cheaper batteries with both upsonic and a LED torch person recently. Upsonic mentioned holding time, lead content and the other gent mention fires

The High AH I put in last night is holding much better than my first test before charging! When tested this morning 12 hours after on charge I got 60 minutes and at over 65% power remaining. The UPS did recharge the higher A.H. but it was not 100% showing 92% a few seconds after I turned the mains power off. Even when new, the UPS showed an immediate drop from 100% to 80ish with the OEM 7ah batteries so this is not a concern.

The cheap UPS I brought for the batteries (Cyberpower) is not sinewave output. It is my understanding that Mac Books, most Laptops and my server require a Pure Sine Wave Inverter to run successfully (I know you can get some to work sometimes on non pure sinewave). It is $250 odd for cyberpower VA 2200 1320 watt compared with about 5 times that for the equivalent Australian built UPsonic.

May not be for everyone. Take old battery out of UPS and hard wire a power lead to a deep cycle 12V battery. You could keep this charged with a solar pannel and a charge regulator. If you have the room elsewhere, you wouldn't have to find a battery to fit inside the box (thinking outside the box, I am.)

Les

I use 100 ah deep cycle batteries on my UPS (hard wired) , no probs, works for 6 hours, just connect 12v charger after pwr fail to top up (if you feel the need), UPS charger is adequate and keeps it in float.

I was told the reason you don't connect an external battery to an UPS is that the internal inverter/charger isn't electrically isolated from the mains, so a potential shock risk exists. Stay safe, peoples, and make sure your battery terminals aren't contactable while live.

Originally Posted by bee utey

I was told the reason you don't connect an external battery to an UPS is that the internal inverter/charger isn't electrically isolated from the mains, so a potential shock risk exists. Stay safe, peoples, and make sure your battery terminals aren't contactable while live.

yes but..

my upsonic has the ability to attach external batteries using an anderson plug fitting. As long as the input voltage was 24v so it would need two batteries. I tried plugging camping trailer deep cycle and the deep cycle from my dual battery in and it does work and would hold my set up in power for 2 days or more I guess. 24 volt charging would be a small issue if I disconnected and manually recharged every week or two. The 2 9ah batteries are more than enough for my needs. The anderson plug and cables are in my car so if I lost power I can simply plug the extra power in if needed.

Cyberpower does not have external plug but you could hard wire it if you could be bothered. its output is 230v when on batteries not enough for my TV and stereo! It could be the non sinewave output as well. Plugged a medical vaccine fridge in which did not like the Cyberpower 230v output. The fridge works well on the upsonic when I tested it.

The Cyberpower easily held my laptop up fully charged for 2 days and 40% charge remaining! It is not perfect and still a bit dubious about the power output simulated sine wave.

Originally Posted by weakestlink

yes but..

my upsonic has the ability to attach external batteries using an anderson plug fitting. As long as the input voltage was 24v so it would need two batteries. I tried plugging camping trailer deep cycle and the deep cycle from my dual battery in and it does work and would hold my set up in power for 2 days or more I guess. 24 volt charging would be a small issue if I disconnected and manually recharged every week or two. The 2 9ah batteries are more than enough for my needs. The anderson plug and cables are in my car so if I lost power I can simply plug the extra power in if needed.

Cyberpower does not have external plug but you could hard wire it if you could be bothered. its output is 230v when on batteries not enough for my TV and stereo! It could be the non sinewave output as well. Plugged a medical vaccine fridge in which did not like the Cyberpower 230v output. The fridge works well on the upsonic when I tested it.

The Cyberpower easily held my laptop up fully charged for 2 days and 40% charge remaining! It is not perfect and still a bit dubious about the power output simulated sine wave.

The external battery plugs on my UPS are 96v, I have 16 x 6v batteries in series parallel that total about 800amps, the runs my radio shack with everything on for 2 days solid and I have a lot of stuff to run..

The reason the battery connections must be suitably insulated is in case there is a fault and 240V AC is put across the terminals. I could find the relevant Australian standard, but I can't remember which one it is. Maybe AS3439?

Increasing the battery size won't increase the output power of the UPS, just the time it supplies it.