Replacing Batteries in an APC Smart-UPS SMT1500
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- Опубликовано: 13 сен 2024
- I bought a UPS (Uninterruptible Power Supply) with dead batteries, let's replace them! This UPS is an APC Smart-UPS SMT1500 with an APC AP9631 Network Management Card.
Batteries are 12V 18Ah sealed lead acid, available here, www.ebay.com/i...
Filmed with a GoPro Hero8 and Rode Wireless Go II. Edited with Kdenlive.
I'm using CSB GP12170 Batteries for my SMT units. I think it's one of the top tier brands out there. Your load is way too low for this UPS that's why it cannot calculate the load (and the remaining time) correctly, like you said. You need at least 30%. If it's still way too off you need to calibrate the battery time by applying more than 30% steady load and let it drain the battery completely. Procedure is a bit weird as the power will drop so I wouldn't recommend doing that with your equipment connected (I'm using tungsten lights)
Btw these are designed so you can hot swap the battery while its still on, use the battery disconnect in the back before hot swapping. I have one I also bought used, they are really nice and a great value. I wasn't lucky enough to have the network management card come with it but I found one used on ebay. One warning about these units thou, the self test isn't perect and if the battery is bad the unit sometimes will just shut down with little warning. Just replace the battery and your good to go for another 3-5 years.
Greetings from Indonesia: I bought a used APC Smart-UPS SMC1500IC for US$50. Batteries were dead, but I changed them out with new ones. At our avocado farm, electricity is VERY UNSTABLE and lightnings . Based on personal experience: the APC units seem to withstand the lightnings better compared to other brands.
Hi! I have the same unit and when i disconnect the ups from wall outlet the loads turned off and give this humming and buzzing noise. Do you think it’s the batteries that I need to replace? Thanks for any advice.
WONDER - CAN SWAP TO LITHIUM BATTERY INSTEAD TO HAVE MORE BACKUP TIME ? /// THX 4 SHARING THIS...
Technically you can, but it will degrade/harm the lithium battery and give it a much shorter life to the point that it will have worse longevity than lead-acid. The charging circuitry isn't designed for any lithium chemistries.
LiFe is the one that looks like SLA so I assume thats the one you are talking about...and technically yeah, it should work. The thing is if it goes sideways it goes really hard sideways and that might mean battery goes boom and the house burns down. Not really worth it given the purpose of a UPS is not to keep running when the power is out...its to give you time to gracefully shut things down, and in this case, the UPS will actually do that for you if you configure it properly.
Forget LiPo entirely...too many ifs on that one and one, dead battery detection, is almost definitely in the charging circuit and LiPo really hates that.