Does anybody happen to have a temp sensor for a Xantrex XW inverter? This is the type that bolts onto the negative battery terminal. I am not sure but I think the Magnum temp sensor may work as well. We have been trying for weeks to track one down for a customer from our distributors and Schneider-everyone says they have it but they don't. . .
If so, shoot me a message off list and I will take it. Used is fine. . . Best regards, Mark Dickson, NABCEP Certified Solar PV Installer T Oasis Montana Inc. _____ From: [email protected] [mailto:[email protected]] On Behalf Of Maverick Brown [Maverick Solar] Sent: Tuesday, March 01, 2011 6:58 PM To: 'RE-wrenches' Subject: Re: [RE-wrenches] Home Brew Frequency Switch "I have considered using a drop out contactor to isolate the inverters from the generator following a loss of line voltage." I suggest that method above as the best. Generators can change frequencies under load and other conditions, etc. so there would not be such a precise control. Line voltage coil relays are also cheaper and easier to get as compared to frequency controls. The voltage drop out contactor might be easier to implement using the KISS method. Good Luck! Maverick _____ From: [email protected] [mailto:[email protected]] On Behalf Of Mark Frye Sent: Tuesday, March 01, 2011 11:20 AM To: 'RE-wrenches' Subject: [RE-wrenches] Home Brew Frequency Switch Folks, I am back on the project where I want to install grid tied inverters (Enphase) on a feeder located downstream of a generator and ATS. I have considered using a drop out contactor to isolate the inverters from the generator following a loss of line voltage. As an alternative, how well might it work to reset the generator frequency so that it is outside the inverter range? In this way the inverter would always see the generator as "bad" energy and therefore would never connect to the generator, only the utility. The nominal frequency range for the inverter is 59.3 to 60.5. What is the effect on the loads in the household if the generator frequency is adjusted to say 58 or 62 hertz? Would the higher or lower number be better? Would this fry everything in the house? I can't see that making a relatively small change like this would effect the overall impedance such that a problem with current capacities would be a problem. It seems like the frequency would be more of a problem for some devices. Anyone have experience with deliberately adjusting generator frequency away from 60 hertz as described above? Mark Frye Berkeley Solar Electric Systems 303 Redbud Way Nevada City, CA 95959 (530) 401-8024 <http://www.berkeleysolar.com> www.berkeleysolar.com
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