You mentioned this is out of the country -- is it 230v line to neutral, or 120/208? OutBack's export Radian can do three phase, up to 72kW continuous.
HTH, Phil On Tuesday, March 25, 2014, Ray Walters <[email protected]> wrote: > OK everyone is steering me towards the Sunny Island. I can probably > justify the inverter cost difference to the customer, then I found the SMA > Multicluster Box for the SI. It seems like a glorified AC Combiner and > transfer switch box, but it retails for over $20K! Yikes. > Do we have to use that for a 3 phase install, or are there much lower cost > alternatives. This is out of the country and does not need to be NEC2014 > compliant. (maybe NEC 1956 compliant would be about in keeping with the > rest of the wiring.......) This would be a budget buster for sure. > > R.Ray Walters > CTO, Solarray, Inc > Nabcep Certified PV Installer, > Licensed Master Electrician > Solar Design Engineer > 303 505-8760 > > On 3/25/2014 4:21 PM, Kevin Pegg wrote: > >> Hi Ray, >> >> I have several 3-phase off-grid inverter/battery/generator systems out >> there. >> >> - SMA Sunny Island is the best. Can scale to at least 180 kW, maybe more. >> Reliable & very solid. I have several sites going over 2 years without a >> single second of power outage. >> - Xantrex XW. It can work in a 3-ph config, but it's not as stable >> system. We have taken to preventatively rebooting the systems every 4 >> months and that helps a lot - at least the outage can be planned and on our >> terms. >> - Outback has had so many power quality nightmares I won't go there >> anymore. >> - I believe Magnum has a 3-ph option but haven't installed one yet. >> >> SMA inverters are more expensive. And they work very well. They also have >> a very good battery charging algorithm and integral gen start control. >> >> Kevin >> >> -----Original Message----- >> From: [email protected] >> [mailto:[email protected]]On Behalf Of Ray >> Walters >> Sent: March 24, 2014 6:44 PM >> To: RE-wrenches >> Subject: [RE-wrenches] 208 3 phase Off Grid Inverter >> >> >> Hi All; >> >> I'm exploring options for an off grid project with an existing 30 Kw >> Kohler wired for 208 vac 3 phase. The generator runs some 8 hp air >> compressors, so rewiring it is not an option. We're primarily >> interested in reducing gen run time from the current situation: 14 hrs/ >> day. >> So far, only the Outback VFX inverters seem capable of being wired in >> 208, 3 phase, but according to the manual they can only be stacked 1 >> inverter per leg. This limits the system to only 3 inverters total, or >> 10.8 kW. I would like expandability beyond this. >> 1) are there any other inverters available that I'm over looking? >> 2) Should I consider a transformer to convert from 208 vac/3phase to 240 >> vac/ singe phase? >> >> We're not going to even try to run the compressors, just the other >> single phase loads, mostly 120 vac, but we have a couple of small air >> conditioners, that are currently running on 208 single phase. I believe >> they would run fine on 240 vac, as they have a name plate rating at 230 >> vac. >> 3) We may possibly run 2 separate 3 inverter stacks and only tie >> together at the battery, but otherwise they would not be connected. This >> seems inefficient, and would require some load balancing of the various >> inverters. >> >> All help and discussion is greatly appreciated as always, >> >> > _______________________________________________ > 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 > >
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