I use the Astron BB-30M for shack and RV. This is the 30A version, but they make larger. Attach minimum 33.6 Amp 13.8 V supply, your SLA battery(ies), and your load. (33.6 Amps is max load plus charging current.) The controller will switch immediately to battery if the power supply DC goes away. During heavy loads the power supply and battery will combine for greater output. And of course the controller keeps battery charged. If your batteries are flooded lead acid this is NOT the solution. Flooded lead acid batteries require a three level charger.
I worked many years for firms that designed, manufactured, and installed equipment requiring heavy battery backup. We NEVER attempted to isolate the batteries from each other. We did always install new batteries of same technology (FLA, AGM, Gel) and manufacture. In fact, my house emergency power is a Trace inverter powered by 12 80AH AGM batteries in series/parallel (48volt). They have been operating flawlessly for 8 years now. -----Original Message----- From: Elecraft [mailto:[email protected]] On Behalf Of N2TK, Tony Sent: Thursday, January 22, 2015 2:48 PM To: [email protected] Subject: [Elecraft] Battery back-up system for multiple rigs Looking for some advice. Trying to help out a friend who is setting up an emergency communications system for the Hams in their condo group. <snip> ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
