The issues is not current as much a voltage headroom. If you are running a 12 volt system which quickly drops to 12 volts when the power quits, and your radios quit working at 11 volts, you will not have as much time as if you were running a 24 volt system and the radios quit working at 11 volts.
From: Adam Moffett Sent: Monday, March 20, 2017 11:25 AM To: [email protected] Cc: [email protected] Subject: Re: [AFMUG] DC Power Site If you had a couple of < 10 watt devices, I don't see how you'd have an issue with too much current. ------ Original Message ------ From: "Chuck McCown" <[email protected]> To: [email protected] Cc: [email protected] Sent: 3/20/2017 1:23:42 PM Subject: Re: [AFMUG] DC Power Site I would never build a 12 volt site if there was any way to avoid it. From: Justin Wilson Sent: Monday, March 20, 2017 11:21 AM To: [email protected] Cc: [email protected] Subject: Re: [AFMUG] DC Power Site Don’t skimp by going with the lower voltage. You will run into an amperage issues pretty quickly. Seen a 12-13 volt site with 1 backhaul and an omni run into amperage issues within a week. Voltage is fine, just way too much amperage. It’s not worth the headache. Justin Wilson [email protected] --- http://www.mtin.net Owner/CEO xISP Solutions- Consulting – Data Centers - Bandwidth http://www.midwest-ix.com COO/Chairman Internet Exchange - Peering - Distributed Fabric On Mar 20, 2017, at 1:11 PM, Darin Steffl <[email protected]> wrote: Hello all, We're looking to build our first DC power site for small MicroPops and I see two options after reviewing the WISPA archives. The first option would be the the SDR-240-24 and DR-UPS40 with Two 12v batteries powering a Netonix DC switch. The second option we were looking at is just doing the AD-155A with one 12v battery but I see the charging current is only 0.5 amps and voltage is only 13.3V which is not an optimal float voltage. My question is, to keep cost down, would we be OK going the AD-155A route with the slightly lower float voltage with a 35ah battery? We're ok with the battery taking longer to charge but I'm just most worried if the 13.3V will wreck the battery or not. Thanks all -- Darin Steffl Minnesota WiFi www.mnwifi.com 507-634-WiFi Like us on Facebook
