I've had good luck with both the SureSine from Morningstar and Exeltech for inverters. Couldn't tell you the noise output.
Also, you may want to try Solar Converters Inc, or Samlex for DC to DC converters. Mike Kocsmiersky Principal Phone: 413 883-3144 Spirit Solar www.SpiritSolar.net From: Ray Walters [mailto:r...@solarray.com] Sent: Monday, March 28, 2016 6:47 PM To: RE-wrenches Subject: Re: [RE-wrenches] DC to DC converters What about building a 30 vdc system (5 x 6v batteries in series) and adjust the settings on a Midnite Classic to work with that? How tight does the 30 vdc output need to be? On inverters, I've had trouble with the Suresine, basically not working with GFCI outlets. I keep trying different models of GFCIs, but they keep randomly tripping on 2 different systems. Morningstar's list of "approved" GFCIs doesn't list any currently manufactured models, while calls to their tech support yields "Oh, that shouldn't be a problem, it should work with all GFCIs..." Way too many free trips out trying to fix this, so I may have to abandon GFCI protection, or replace the inverters. My suggestion for that small load: Exeltech 125. Better than grid waveform, and I recently pulled one out of corroded outdoor enclosure almost 15 years old: it looked terrible, but was still working fine. It would also be lower cost and fit in a smaller enclosure. R.Ray Walters CTO, Solarray, Inc Nabcep Certified PV Installer, Licensed Master Electrician Solar Design Engineer 303 505-8760 On 3/28/2016 2:24 PM, Dan Fink wrote: Hi William; 30VDC is kind of odd, but 36VDC is common. The folks at Solar Converters might be able to fix you up with a custom one, or perhaps 36V is within the sat unit's input range. As for the inverter, I've never gone wrong with the Morningstar SureSine. Slick little unit. Dan Fink Adjunct Professor of Solar Energy Technology, Ecotech Institute IREC Certified InstructorT for: ~ PV Installation Professional ~ Small Wind Installer Executive Director, Buckville Energy NABCEP Registered Continuing Education ProvidersT <tel:970.672.4342> 970.672.4342 On Mon, Mar 28, 2016 at 1:44 PM, William Miller <will...@millersolar.com> wrote: Friends: I am designing a satellite data interface for a large off-grid system for a state highway department facility. We will be using the Outback Optics data capabilities along with equipment manufactured by Control by Web. I'd like to run the satellite system on a battery power source so I can hope to use it when we need it most, when the power is down. We have a separate 24 volt battery bank remaining from a previous generator control system. The satellite system operates on 30 VDC at 2 amps. My first choice is to find a DC to DC converter from nominal 24 volts. Do any of you know of one that you could recommend? My second choice is to use a small inverter. Can anyone suggest one at this small wattage? I don't know how good the power supply is at rejecting waveform distortion so I presume an inverter needs to be somewhat close to a sine wave. Thanks in advance. William Miller Gradient Cap_mini Lic 773985 millersolar.com <http://www.millersolar.com/> 805-438-5600 _______________________________________________ List sponsored by Redwood Alliance List Address: RE-wrenches@lists.re-wrenches.org Change listserver email address & settings: http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
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