Keith, Another wrench commented about the Exeltech inverters being capable of working with a -48V battery system.
His info was good. The DC input is "floating" on XP and MX inverters, and may be used in positive-ground telecom battery systems as well as negative ground systems .. such as off-grid, etc.. The MX 120V models are available up to 20 kW, 40 kW in 240V, and 60 kw in 208V three phase. The 120V models can grow incrementally in 1 kW steps; 240V in 2 kW steps; and the three-phase grows in 3 kW steps. You'll have to contact their sales department for more info. By the way .. my own jaded view of "kVA" ratings .. they're marketing hype to make an inverter look more capable on paper than it really is. Dan -------------------------------------------- On Thu, 1/30/14, Keith Cronin <[email protected]> wrote: Subject: [RE-wrenches] -48 Volts at the Phone Company To: "RE-Wrenches" <[email protected]> Date: Thursday, January 30, 2014, 10:16 PM Hi folks Any inverters in the marketplace that will happily take -48 volts off the phone companies standard battery banks they use to backup their phone network for us? Client wants to drive a 15kva load and replace and existing conventional UPS system that was rated for 40kva. Thanks Keith Cronin _______________________________________________ List sponsored by Home Power magazine List Address: [email protected] Change email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out participant bios: www.members.re-wrenches.org
