I have bought the APC packs. Expensive, but it fits in the rack so nice. Hopefully they're sticking through!
I can't rotate the "good" ones anywhere else, they're different size batteries than everything else unfortunately. Josh Luthman 24/7 Help Desk: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Tue, Dec 29, 2020 at 7:23 PM Steve Jones <[email protected]> wrote: > We get 1 to 7 years on the apc packs. > At that price for that ah, I'd replace them all, hold onto the "good" ones > and rotate them into the noc > > On Tue, Dec 29, 2020, 4:18 PM Josh Luthman <[email protected]> > wrote: > >> >Also, that’s a lot more amp hours than the internal batteries, so even >> with an XL, I would expect it to take a long time to recharge the batteries >> after an outage. >> >> Sure, it takes a good hour or few. Once power comes back I don't care. >> I just want my multi hour run time back! >> >> Josh Luthman >> 24/7 Help Desk: 937-552-2340 >> Direct: 937-552-2343 >> 1100 Wayne St >> Suite 1337 >> Troy, OH 45373 >> >> >> On Tue, Dec 29, 2020 at 5:09 PM Ken Hohhof <[email protected]> wrote: >> >>> 6 years is beyond what I’d expect for battery life on that system. I >>> would probably replace them every 3 years even if they never get discharged. >>> >>> >>> >>> Also, that’s a lot more amp hours than the internal batteries, so even >>> with an XL, I would expect it to take a long time to recharge the batteries >>> after an outage. >>> >>> >>> >>> >>> >>> *From:* AF <[email protected]> *On Behalf Of *Josh Luthman >>> *Sent:* Tuesday, December 29, 2020 3:04 PM >>> *To:* AnimalFarm Microwave Users Group <[email protected]> >>> *Subject:* Re: [AFMUG] Custom batteries on APC Smart UPS 750XL >>> >>> >>> >>> Well I'm just going to replace all 4 of them then (12v batteries wired >>> for 24v). No sense in trying to figure out which one is bad IMO - $300 and >>> a wrench I'll be done in an hour. >>> >>> >>> Thanks for the sanity check! >>> >>> >>> >>> Josh Luthman >>> 24/7 Help Desk: 937-552-2340 >>> Direct: 937-552-2343 >>> 1100 Wayne St >>> Suite 1337 >>> Troy, OH 45373 >>> >>> >>> >>> >>> >>> On Tue, Dec 29, 2020 at 3:53 PM Chuck McCown via AF <[email protected]> >>> wrote: >>> >>> Yes, best to periodically discharge it and take volts per cell or volts >>> per battery every few minutes. The bad cell/battery will start to make >>> itself evident very quickly. I have a charger setup that does this for me >>> automatically. >>> >>> >>> >>> *From:* Josh Luthman >>> >>> *Sent:* Tuesday, December 29, 2020 1:48 PM >>> >>> *To:* AFMUG >>> >>> *Subject:* [AFMUG] Custom batteries on APC Smart UPS 750XL >>> >>> >>> >>> These batteries: https://www.batteriesplus.com/productdetails/97=479=1 >>> >>> >>> >>> I first installed this system just under 6 years ago. We've lost power >>> a couple of times, but only for a short while (30-45 minutes). I remember >>> it saying something stupid like 7 hours of run time. I have no idea how >>> APC calculates this. >>> >>> >>> >>> Today we had another outage, where a phase went out, and it switched >>> over to batteries again. It said something like 30 minutes of run time! >>> Luckily I ran upstairs and after 10-15 minutes, it was really pissed that >>> it didn't have power and angrily beeped that it was nearly ready to give up >>> (at which point I put it on the generator). >>> >>> >>> >>> After a few hours we got utility back up and I moved the UPS back over. >>> After lunch I wanted to test the battery voltages, but in the 5 seconds it >>> was unplugged it got really pissed again so I plugged it back in. >>> >>> >>> >>> With the charger on it, each battery individually is showing me 13.83v. >>> >>> >>> >>> In the first 10 minutes of the day without power, battery voltage went >>> from 27.6 down to 22.36. This confirms I have at least one bad battery, >>> right? The load is roughly ~83 watts according to the UPS. >>> >>> >>> >>> Josh Luthman >>> 24/7 Help Desk: 937-552-2340 >>> Direct: 937-552-2343 >>> 1100 Wayne St >>> Suite 1337 >>> Troy, OH 45373 >>> ------------------------------ >>> >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >>> -- >>> AF mailing list >>> [email protected] >>> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >>> >> -- >> AF mailing list >> [email protected] >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com >> > -- > AF mailing list > [email protected] > http://af.afmug.com/mailman/listinfo/af_af.afmug.com >
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