Yep, it sure should be able to survive 60 volts. Lead acid cells float at 2.25 VPC. 2.25 * 24 = 54 volts at room temp. (Some say 2.27, others at 2.3 which would make the string 55.2 volts)
I have always used 54 to 55 as my rule of thumb for large stationary batts. Higher volts at cooler temps. Batts live longer at cooler temps. .https://batteryuniversity.com/index.php/learn/article/how_heat_and_harsh_loading_reduces_battery_life From: Adam Moffett Sent: Tuesday, June 18, 2019 10:20 PM To: af@af.afmug.com Subject: Re: [AFMUG] UPS and DC to DC conversion That's weird to me. Any telecom equipment made for 48v I would have assumed they intended it to be used with a rectifier, and consequently I would assume it'd be ok up to at least 56v continuous; and maybe more like 60-70v for a short duration. But yeah, DC-DC converter is the fix. On 6/18/2019 11:36 PM, Sean Heskett wrote: You need to use a DC-DC converter for sensitive equipment like that. Meanwell has a good selection. On Tue, Jun 18, 2019 at 8:12 PM Sterling Jacobson <sterl...@avative.net> wrote: Apparently the UBNT EP-S16 freaks out if it goes above 54v. Is there any way to assure it doesn’t float/charge above 54v, or maybe even just 50v? From: AF <af-boun...@af.afmug.com> On Behalf Of TJ Trout Sent: Tuesday, June 18, 2019 7:26 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] UPS and DC to DC conversion contact talley or tessco for a price, don't trust what you see on google, it's like 50% less On Tue, Jun 18, 2019 at 6:25 PM TJ Trout <t...@voltbb.com> wrote: all 48v systems for battery power will float at 54v, it's also adjustable via the battery chemistry On Tue, Jun 18, 2019 at 3:33 PM Sterling Jacobson <sterl...@avative.net> wrote: Ok, cool. So can the 7bc2 be adjusted slightly to output 50v instead of just 48v? There will be some loss going 100’ or so, right? From: AF <af-boun...@af.afmug.com> On Behalf Of TJ Trout Sent: Tuesday, June 18, 2019 4:23 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] UPS and DC to DC conversion 12-54v is inefficient, if you want 200ah of battery use 4x50ah batteries for a 48v string ICT24048-7BC2 360W 54v AC-DC + LVD + Charger ICT-TMP - Temp sensor for charge compensation if batt's outside ICT-WMB - Wall mount bracket SITE Monitor - Voltage monitoring Or Alternativly; 48v din mount PSU 48v 'dc ups' to charge batt's and provide LVD OR 48v din 'dc ups' with integrated psu + lvd + charger (i.e. DIN-UPS 48-5 cheaper options available) On Tue, Jun 18, 2019 at 2:50 PM Sterling Jacobson <sterl...@avative.net> wrote: I’m trying to put a “box” system together for our house POP sites and need help with the DIN stuff and UPS. Can you guys give me an idea or example of the following? I want to take standard AC 15A in from a breaker outside the box. And using maybe one or two 12v 105AH AGM batteries, supply 50v 6A up the side of the house. I have never ordered DIN parts like this, guess I don’t have to use DIN, but would be nice. Having a problem finding a DC to DC converter that takes 12v and upconverts to 50v 5-6A. Is this the cost effective method? Something like this: Monitoring Sitemonitor Base Unit II SMON Base II 1.00 $100.00 $100.00 UPS Monitor Sitemonitor Int MorningStar MeterBus SMON MorningStar 1.00 $60.00 $60.00 UPS Charge MorningStar Sunsaver Dual 1.00 $165.00 $165.00 Battery AGM Deep Cycle 105AH NPP FT12-105AH 2.00 $225.00 $450.00 DIN Parts like DC fuse/breakers and trunk stuff 1.00 $100.00 $100.00 DC 12v to 50v 5A 1.00 $150.00 $150.00 -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -------------------------------------------------------------------------------- -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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