The higher the temp, the lower the voltage. At 120 F it would be about 13 volts. At –20F it would need to be about 15 volts.
Easier to overcharge when hot. Harder to fully charge when cold. Sucks for electric cars. From: ch...@wbmfg.com Sent: Friday, July 8, 2016 4:12 PM To: af@afmug.com Subject: Re: [AFMUG] Scary thing to see on a UPS It adjusts float voltage according to temp. From: Sterling Jacobson Sent: Friday, July 8, 2016 4:04 PM To: af@afmug.com Subject: Re: [AFMUG] Scary thing to see on a UPS That’s use Alpha UPS rated for outdoor, even in climate controlled cabinets. The batteries should be fine though, if they are sealed AGM? All of my batteries lie underneath the cabinets in the non-climate controlled part and have a temperature gauge connected to the Alpha so it adjusts something according to temperature of the batteries. From: Af [mailto:af-boun...@afmug.com] On Behalf Of Colin Stanners Sent: Friday, July 8, 2016 2:13 PM To: af@afmug.com Subject: [AFMUG] Scary thing to see on a UPS A very rural POP, not managed by us, had an A/C trip the breaker. That's 122 deg Fahrenheit. A router there shows 64 deg C... I'm afraid of what is happening to those batteries.
