Recent content by SubnetMask

Thanks for your help - I replaced the 30 batteries in one of my UPS's (APC SMX3000LV) and it's external battery pack (one of the RBCs from the external pack measured about 9 volts, when fully charged is 136, so they were just a 'tad' dead :oops:), and after running a runtime calibration, it's...

I believe the NoCo10 does have some sort of auto repair, but supposedly it's a very mild repair. It also has a manual repair that's supposedly much stronger. I only used the NoCo initially to bring them up from dead, from there I've only used the 10A power supply as was suggested. Edit: When...

I finally was able to finish the second and third charges (14.8 for 8 hours, 13.8 for a week), and the results are below. IR-1 is the test before I did the extended charges and the IR-2 is after. I don't recall the IR-1 temperature, but the temp today when I took the IR-2 was 90*, so being...

Wow this went off the rails lol. What mikeinnyc posted may work and whatnot, but it's far outside of the scope of what I was asking... Nobody advocated overcharging the batteries. The voltages sunshine_eggo mentioned are within the ranges printed on the batteries, these batteries have never been...

So I got all 12 packs charged up with the noco to halt any further degradation, and I got the 'harnesses' build to convert the packs from series to parallel, put them all back together in their new configuration, paralleled them all together and connected the noco again to top them all off...

So I've started getting the batteries charged - Making the harnesses to convert the packs from series to parallel is kind of tedious lol. I've gotten 16 charged with the NoCo so far and another 16 are in process... According to tester, the batteries, at least the ones that I've charged with the...

Thanks again for the info - yes, for charging, parallel for sure. The UPS is designed for using them in series - my UPS has 10 in series in the pack, the UPS these came from have two 8s packs in series. The only amperage marking on the batteries is 'Initial Current: Less than 2.0A', and the PDF...

Thanks for the info - for more detail, the batteries inside are 'Vision CP 1250HC' 12v 5AH Valve Regulated batteries, and the info on the side states '14.5-14.9v Cycle use' and '13.6-13.8v Standby use'. Edit: I found this datasheet on them...

I just acquired several UPS external expansion batteries that were BNIB, never been attached to a UPS, but have been sitting in box on a pallet for 'several years' - based on the manufacture date, I think somewhere around 2.5 years. So obviously, self-discharge is an issue. I was expecting them...

You know, I didn't think of putting the charging through the sensor... technically, if the charging wire goes through the sensor as well as the load wire, the net effect should be the same - if 15A is going towards the battery through the sensor and 20A is going away from the battery, the 15A...

So I ended up ordering it - It is exactly as pictured in the amazon images, not a sensor like WoodySolarVan posted. That being said, I haven't tinkered much yet, but so far it seems like it'll work. As WoodySolarVan suggested, it doesn't show 'charge' and 'discharge' per se, but instead the...

Depending on where you are, there may be a recycler that'll pay you per pound. I have one local to me that I've taken a TON of dead SLA UPS batteries to for a handful of cents per pound.

Does anyone have any experience with this charge/discharge meter:https://www.amazon.com/Charge-Discharge-DROK-Voltmeter-Watt-Hour-Multimeter/dp/B07YWVCBRN/ref=sr_1_35?crid=15KI8IZIMQPXI> If so, is it any good? If not, can anyone suggest something decent but not crazy expensive that'll track...

I'm looking into setting up a fairly small setup with two inverters, not because I need 6000w of power but for inverter redundancy, and I'm thinking of starting out with two 12v 100Ah LiFePo4 packs in series, which would provide 2400Wh of energy at 24v - roughly 4x the capacity of one of my...

Interesting read, but in this particular case, my capacity test was done at a very similar draw (within half an amp or so, and not intentionally) of this particular load. The Renogy is set to a LVC of 11.6v. The problem is the info out there is pretty generic, and most seems to be related to...