What models are you using? On Fri, Jun 16, 2017 at 2:32 PM, Jerry Shafer <jerrysgarag...@gmail.com> wrote:
> Wrenches > We will only use the cummins gensets customer service has been great, > warranty work has seldom been needed but has been prompt. Cummins quality > appears better then most. They have two wire start, we have these in some > very remote locations which require 100% availabiliy can not aford any call > backs. > Just my two cents. > Jerry > > On Jun 16, 2017 7:21 AM, "August Goers" <aug...@luminalt.com> wrote: > >> Thanks for the good feedback folks! >> >> >> >> We are using a Sunny Island setup because we had access to a free Sunny >> Island and Sunny Boy being scrapped from another site. Otherwise I was >> definitely planning on going with a Outback DC coupled system. >> >> >> >> I think the trick here is trying to find a portable generator that has a >> two-wire start option. I’m looking through the usual genny suppliers and >> nothing has presented itself so far. Anyway, I’ll keep looking and will >> check out Chris’ suggestion on the nexus controller and Generac propane >> unit as well. >> >> >> >> FYI, here is a link to what the portal is like. It’s going in National >> Park land by the Golden Gate Bridge so I hope we can pull it together! >> http://www.sharedstudios.com/ >> >> >> >> August >> >> Luminalt >> >> >> >> >> >> *From:* RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] *On >> Behalf Of *Chris Mason >> *Sent:* Friday, June 16, 2017 4:56 AM >> *To:* RE-wrenches <re-wrenches@lists.re-wrenches.org> >> *Subject:* Re: [RE-wrenches] Generator choice for Sunny Island >> >> >> >> To my limited mind, the whole 120V sunny island setup is a disaster. Why >> not install a DC coupled 8KW Outback Radian and solve all your problems. >> USe any 240V generator, although finding a 2 wire start gasoline unit may >> be hard. I would use a Nexus controller generac propane generator with >> propane tank, all mounted on the container. I would never design anything >> to use gasoline, it's too dangerous. >> >> >> >> On Fri, Jun 16, 2017 at 7:19 AM, Matthew Sirum <matthewsi...@gmail.com> >> wrote: >> >> Greetings August, >> >> Great thoughts and comments from Brian! I would also suggest speaking >> with the generator manufacturers' tech/engineering folks regarding the >> 120VAC configuration and to confirm 2-wire start set up once you have >> a brand and model or two in mind. Generator parts and service >> availability in the region of the project may also drive brand >> selection. If you need to maximize the inverter's battery charging >> capabilities (depending on battery system charging requirements) you >> may end up needing to look at generators in the 7.5 kW to 8.0 kW >> capacity range to allow for headroom in generator output loading. >> >> Also; I am curious how you arrived at an AC coupled design for this >> project. I do not know any of the details or specific projects goals >> you are working with, but I would potentially consider a DC coupled >> system design... DC/DC charge controller(s) would keep the battery >> system charged (and any DC loads operable) even if the Sunny Island >> and/or Sunny Boy(s) have a failure or is taken offline. If most of >> the AC loads are 120VAC I would consider keeping the inverter AC >> output circuit 120VAC and install a dedicated transformer solely for >> the 240VAC load.... Or perhaps consider a 120/240VAC inverter model. >> Depending on the overall situation a DC coupled system could be more >> resilient. The dedicated transformer for the 240VAC load could also >> potentially help make the system more robust. Also; I have spoken >> with a number of folks who have told me they wish the Sunny Island had >> more/better features for generator integration. I'd like to hear more >> from those who have plenty of experience designing and installing >> systems with Sunny Islands and generators to learn what the current >> thoughts and issues are. >> >> I hope some of these thoughts may be helpful. >> >> Best regards, >> >> ----MATT >> >> Matthew Sirum >> P.O. Box 1227 >> Greenfield, MA 01302-1227 USA >> phone: +1.413.773.0611 <(413)%20773-0611> >> email: matthewsi...@gmail.com >> >> >> -------- Original Message Below -------- >> >> [RE-wrenches] Generator choice for Sunny Island >> August Goers august at luminalt.com >> Thu Jun 15 09:02:41 PDT 2017 >> >> Hi Wrenches, especially those of you who work on off-grid projects, >> >> We have an upcoming off-grid project where we will be powering a storage >> container with electronics in it. The loads are mostly 120 volt but there >> is a 240 volt heat pump that might occasionally run. We’re AC coupling the >> Sunny Island with a Sunny Boy PV inverter. So, we’ll be installing a >> Outback PSX-240 autoformer to bump the Sunny Island’s output from 120 to >> 240 volt. >> >> We need to select a generator for backup. We need a two-wire electric >> start >> (in order to be controlled by the Sunny Island) and preferably a generator >> that is okay just running 120 volt loads since the Sunny Islands input is >> only 120 volt. Something in the 3 kVA -7 kVA range should be fine. >> >> Does anyone have experience or ideas about what kind of two-wire start >> generator we might select? >> >> Thanks, >> >> August >> >> Luminalt >> _______________________________________________ >> 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 >> -wrenc...@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 >> >> >> >> >> >> -- >> >> Chris Mason >> >> NABCEP Certified Solar PV Installer™ >> >> Solar Design Engineer >> >> Generac Generators Industrial technician >> >> >> >> www.cometsolar.com <http://www.cometenergysystems.com> >> >> 264.235.5670 <(264)%20235-5670> >> >> 869.662.5670 <(869)%20662-5670> >> >> Skype: netconcepts >> >> _______________________________________________ >> 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 >> -wrenc...@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 >> >> >> > _______________________________________________ > 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 > > > -- *Will White* Curriculum Developer [image: Inline image 3] e: w...@solarenergy.org w: www.solarenergy.org p: 802-272-3092 PV Installation Professional # 093006-34
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