weak* Ugh.... ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest-IX http://www.midwest-ix.com ----- Original Message ----- From: "Mike Hammett via NANOG" <nanog@lists.nanog.org> To: "Brandon Butterworth" <brandon@bogons.net> Cc: "North American Network Operators Group" <nanog@lists.nanog.org>, "Mike Hammett" <nanog@ics-il.net> Sent: Sunday, April 6, 2025 3:59:06 PM Subject: [NANOG] Re: Small Capacity UPS I'd like to have a couple of options. Stuff exists for the say 1 hour of up time area, though may not have the remote management I'm looking for. It starts to get really week above that, at say 4 or 8 hours. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest-IX http://www.midwest-ix.com ----- Original Message ----- From: "Brandon Butterworth" <brandon@bogons.net> To: "North American Network Operators Group" <nanog@lists.nanog.org> Cc: "Brandon Butterworth" <brandon@bogons.net>, "Mike Hammett" <nanog@ics-il.net> Sent: Sunday, April 6, 2025 3:49:06 PM Subject: Re: [NANOG] Small Capacity UPS On 06/04/2025 19:55:20, "Mike Hammett via NANOG" <nanog@lists.nanog.org> wrote:
Most normal UPSes get terribly inefficient at lower load ratings.
You don't say how long you want to run for. Assuming the mention of extendable batteries means you are looking for several hours or more we've not found any small ones. Generally extendable batteries start with 1kVA or greater units. Due to the lack of suitable devices some UK providers have resorted to - https://www.ispreview.co.uk/index.php/2025/03/broadband-isps-vodafone-bt-kco... but it relies on feeding the devices DC. Our FWA sites are around 50W and are in cabinets so large batteries and feeding things DC is easy. We tend to power everything with POE so all that is needed is a switch with DC in (we've used Netonix but there are others such as Mikrotik). For sites where we want a packaged system delivering AC we've used lightly loaded Eaton 5PX range with extra batteries and just accepted the efficiency, which has not been terrible. There are plenty of consumer portable battery units that offer a lot more battery capacity than UPS generally have. Some operate as UPS and provide AC or DC out. If you feed your devices DC then there is no inverter low load inefficiency. For example you could run all day on just a battery expansion pack (there are larger ones) https://bluettipower.co.uk/products/b80-expansion-battery which can be charged off an AC adaptor and not need the main unit. brandon _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/nanog@lists.nanog.org/message/GWNJPF5D...