Powerbackup solution for a remote site



  • Hello guys, hope you are all safe. I need a solution to a problem and i have very high expectations that this community will help.

    So i am a Wireless Internet Service Provider(WISP) for about 3 yrs now, and i have a Base station which consists of my pfsense router, two broadband routers and about 5 access points (Total=69Watts).In this base station i have a Tex charger inverter and a deep cycle 100AH battery that runs for about 10hrs when there is no AC power/outage.

    Next i have a remote Relay station which consist of 3 access points and a switch(Total=15Watts).Here i dont have a backup and that is what i need advice on, since that power consumption is too low to buy the inverter charger and 100AH battery..I need a backup solution that would not be expensive and also small in size..

    When i was going through ebay i found this Mean Well AD-155A AC/DC Single output Battery Charger UPS Function 151.6 Watt. One of the problems with this product is that the output is D.C, so i think it is not a viable option since i have 3 P.O.Es to power the accesspoints which i think would not work with DC power. Thank you



  • @OpenWifi

    Telecom sites normally use -48V DC, with batteries and rectifiers. That's been standard for as long as I've been in the business, going back over 40 years. There is all sorts of that kind of gear, including PoE switches. If you really need AC powered equipment, then you use inverters. This is not the sort of job where you want to use consumer grade gear. You can also get industrial grade UPS, which may be what you want.

    BTW, I have done cell site work for two Canadian companies and other telecom work for others. Several years ago, I used to plan power cabinets for customer sites, which included dual rectifiers, batteries, breaker panels and more.

    Who did your power work for your main site? They're the ones you should be talking to.



  • @JKnott I personally worked on my main site. I used an inverter charger and a 100AH deep cycle battery



  • There is an AC feed from the socket to my network cabinet



  • @OpenWifi

    Then you need a rack mount UPS to go into that cabinet. The device you linked to appears to be something you'd build into some equipment, not rack mount. Also, what about redundancy? Since you're providing service to paying customers, you shouldn't rely on a single point of failure. As I mentioned, when I planned power cabinets, there were always 2 rectifiers, usually with AC feeds from separate breakers.


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