Its Mexico, so its 60 Hz, 3 phase 120/ 208. I had originally
considered the Radians for this project, until I went down and
determined the actual voltage.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 3/26/2014 7:31 AM, Phil Undercuffler wrote:
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 <r...@solarray.com
<mailto:r...@solarray.com>> 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: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org]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: RE-wrenches@lists.re-wrenches.org
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
<http://www.re-wrenches.org/etiquette.htm>
Check out participant bios:
www.members.re-wrenches.org <http://www.members.re-wrenches.org>
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
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
_______________________________________________
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
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
