also, size your battery strings to be the same or larger than your load in volts. down covering voltage uses less energy than up converting. so you will lose efficiencies if you go that route.
example. running a 12 v battery bank using a netonix DC switch which will up convert to 48v for the switch, then down covert to 24v for most gear will yield you anywhere between 70-90% efficiency. thus making your battery load that much less useful. Running a 48v bank will yield you 99-100% efficiency. which will make sizing calculations easier for your run times. On Thursday, July 14, 2016, Chris Ruschmann <[email protected]> wrote: > if your interested in understanding the technology, then this site has a > lot of information on solar and DC in general. check out the faq's they are > worth the read. > http://www.solar-electric.com/learning-center > > Air fibers use a lot of power in DC land. The biggest thing is > understanding your load. Buy according to that. I spent about a year on a > test site tinkering before I built my first production site. I have never > had an outage. and I've gone 22 straight days with absolutely no sun on > only batteries and no gensets. I'm in Alaska. > > use 24v solar panels if you have space. try and do as large of strings as > possible. 48, 72, 96 Volts. We use midnight solar classic charge > controllers. They are rock solid and work great. > > We use only AGM sealed batteries. My personal favorites are Full River. > > Fused netonix DC switches. > > > typed this on my iPad... > > > > > On Thursday, July 14, 2016, Paul Hendry <[email protected] > <javascript:_e(%7B%7D,'cvml','[email protected]');>> wrote: > >> Nice. How customisable is the charge/discharge side of this unit? Would >> be interested to see if they can be used with LiFePO4 cells. Also, roughly >> how much are these units? >> >> Many thanks, >> >> Paul. >> >> On 15/07/2016 12:33, Gino Villarini wrote: >> >> Just do use this and be done with all: >> >> >> http://www.alpha.com/index.php/products-mobile/cable-tv-broadband-products/ >> item/2448vdc-cordex-psu-2 >> >> On 7/14/16, 5:29 PM, "[email protected] on behalf of Duncan >> >> >> >> *Gino Villarini* >> President >> Metro Office Park #18 Suite 304 Guaynabo, Puerto Rico 00968 >> >> Scott" <[email protected] on behalf of [email protected]> >> wrote: >> >> >Hi, >> > >> >So historically we've been a mostly AC setup, but I'm trying to figure >> >out a DC setup for some of our smaller sites, and hopefully a solar >> >setup as well. I'm new to all of this though so I'm trying to see if >> >anyone has any written guides or part lists. Basic goal is to power an >> >airfiber or equivalent and A few Canopy or Ubnt APs. >> > >> >Here's what I've been looking at so far: >> > >> >48v DC power supply >> >Traco TSP-BCMU360 >> >Packetflux Site monitor 2 base >> >Packetflux SiteMonitor 6 Channel Switch Closure Input >> >Neotonix DC switch >> > >> >This seems to work okay, the TSP-BCMU360 charges and monitors the >> >battery and the Packetflux Sitemonitor provides a network connection to >> >monitor the status. >> > >> >Issues so far: >> > >> >I'm running the site monitor off the BCMU, but this means that it's >> >input power is 48v, I want to monitor the voltage of the battery, but >> >that's just 12v and I don't think I can have different voltages plugged >> >into the two inputs to the site monitor. Another option would be to have >> >the site monitor powered off the batteries directly, but that seems >> bad... >> > >> >Is the packetflux stuff the best solution for this, or is there another >> >web enabling option? Seem pretty good so far, but I'm not even sure what >> >the other options are. >> > >> >The other issue is I have no idea what I should be using for >> >breaker/fuses for the equipment. A suggested list of DIN mountable stuff >> >I should have would be super useful if someone has it on hand. Also who >> >to order this stuff from. >> > >> >The other thing I would like to try is some kind of solar setup. Again >> >it need to be monitored remotely. Power draw would be as low as I could >> >manage. This is Oregon, so not lots of snow, but there are a lot of >> >cloudy days. Packetflux makes several items that integrate with Morning >> >Star controllers. It that a good way to go? Something like a TS-MPPT-30? >> > >> >Batteries are another thing. I'm also very curious if Lithium ion >> >batteries are feasible yet. This would need a different charger but it >> >would save a TON of space and maybe even be cost effective given the >> >smaller enclosure size that would be possible. >> > >> >Then there is the issue of what solar panels to buy. >> > >> >If anyone has any thoughts, comments, links, documents, etc. I'd really >> >appreciate it. >> > >> >Thanks, >> >Duncan >> > >> > >> > >> > >> > >> > >> > >> > >> >_______________________________________________ >> >Wireless mailing list >> >[email protected] >> >http://lists.wispa.org/mailman/listinfo/wireless >> >> >> -- >> This message has been scanned for viruses and >> dangerous content by *MailScanner* <http://www.mailscanner.info/>, and >> is >> believed to be clean. >> >> _______________________________________________ >> Wireless mailing >> [email protected]http://lists.wispa.org/mailman/listinfo/wireless >> >> >> >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2016.0.7640 / Virus Database: 4627/12616 - Release Date: 07/14/16 >> >> >> >> -- >> Paul Hendry >> Skyline Support - NZ NOC >> >> Skyline Networks NZ Ltd >> >> 13-17 Putaitai Street, >> Stoke, >> Nelson >> 7011 >> >> Tel: 022 639 3328 >> >> Email: [email protected] >> >> Web: http://www.skyline-networks.com >> >> >> This email and any files transmitted with it are confidential and intended >> solely for the use of the individual or entity to whom it is addressed. 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