Hi, We do the same, but we use AGM batteries. We found the Walmart (or any deep cycle battery) requires too much maintenance. The water levels usually needed re-filled every 3-4 months.
We found 110aH (real aH, not the over-rated numbers on the deep cycle batteries) AGM on ebay for $100 each. They are maintenance free, should last 8-10 years, and can withstand temperature swings much better. These are heavy duty, UPS class batteries. Each battery weighs 95 pounds and isn't any bigger than a normal car battery. Travis Microserv Wallace L. Walcher wrote: > We purchase used APC UPS's on Ebay for around $50. Search for Item > 160231636080 to see an example. We remove the batteries that come with it > (if there are any). We create a couple of cables to go from the UPS battery > inputs to the external battery pack that we assemble. > > For the external battery pack, we purchase Deep Cycle (Trolling, not > Starting) batteries from Sams Club or Wal-Mart. We usually get the 125 amp > hour ones. Since the UPS's are 24 volt, you need to purchase them in groups > of two, since the batteries are 12 volt. These are not maintenance free, > like AGM batteries, but that also cost less than 1/2 of AGM. > > We create cables to go from the positive terminal of one battery to the > negative terminal of the second battery. This creates a 24 volt battery > pack. Then you run a cable from the open positive terminal of the battery > pack to the positive connection on the UPS. Same with the negative side. > > So, for less than $300, you have a 24volt, 125 amp hour UPS system. > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Patrick Nix Jr. > Sent: Thursday, April 24, 2008 6:03 PM > To: wireless@wispa.org > Subject: [WISPA] A good battery solution > > Any ideas on an inexpensive but effective battery solution for remote > tower location... would like to keep equipment powered 6-8 hours w/o > electric. Equipment includes 1 mikrotik, 1 trango Link45 and 1 trango > M900AP > > > > Thanks > > > > __________________________________________ > > > > Patrick Nix, Jr., > > csweb.net > > (800) 638-2614 > > http://www.csweb.net <http://www.csweb.net/> > > E-Mail: [EMAIL PROTECTED] > > > > ==================================================================== > > ATTENTION: This e-mail may contain information that is confidential in > nature. If you are not the intended recipient, please delete this e-mail > and notify the sender immediately. Thank you. > > ==================================================================== > > > > > > ---------------------------------------------------------------------------- > ---- > WISPA Wants You! Join today! > http://signup.wispa.org/ > ---------------------------------------------------------------------------- > ---- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ > > > -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
