https://www.ict-power.com/wp-content/uploads/2020/02/Affordable-DC-Power-for -Wireless-Broadband-Networks_JAN-2020.pdf
-----Original Message----- From: AF [mailto:af-boun...@af.afmug.com] On Behalf Of Nate Burke Sent: Monday, June 28, 2021 9:58 AM To: Animal Farm <af@af.afmug.com> Subject: [AFMUG] Tower UPS's (again) We've been using the APC SmartUPS 750XL as a Tower UPS for several years. Put 2-8 100+AH AGM Batteries on them, and they've been rock solid for us. I can think of only a handful of failures in the dozens deployed over the last several years. I used to source them off ebay for $50-$70 each, but they're becoming more and more scarce. Anybody have a recommendation for a simple UPS that will do all the monitoring that the APC does and accept big batteries? We're a Metro-Rural Area, our power outages are usually measured in Hours, not days. So I'm not as concerned with the inefficiency of doing the DC/AC/DC Conversion for Runtime, just power stability during outages/fluctuations. I like the ease of connecting the external batteries to the APC, since the XL line has an Anderson plug on the back for them, and has a larger charger than the normal UPS, so recharge times are very quick. When the boss goes to the WISPA Shows, his head is filled with all kids of ideas, so he want's me to investigate doing everything as a DC Plant, When I price that out, with chargers, voltage converters (24/48), inverters, fuse protection, LVD, Monitoring, etc, it always seems like the price is a couple hundred dollars of parts and it would be cobbled together. Am I missing something with doing a DC Plant? I see the telco's at the sites using a rackmount rectifier with power supply modules, but those are a several hundred by themselves, and they are only 48V, they don't have to worry about 24v radios. When I build a site now, I drop in 2 batteries, and the APC, and the site is up and running in a couple minutes. A DIN rail with a couple power supplies and the box is done, and has fully monitored power, and I can plug in whatever I want without any equipment modifications. -- 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
