Allan :
Since you are planning to replace the main service panel, you might
consider the Generac GenReady panel that has a built-in 125A automatic
transfer switch (ATS).
http://www.generac.com/Residential/Transfer_Switches/Essential_Circuit/GenReady_Load_Center/
The upper portion of the panel are the breaker spaces for the
unprotected loads, and the lower portion has the spaces for the
protected loads.
You can get the GenReady with or without a service entrance rated main
service breaker. It's cost is comparable to the stand-alone ATS.
This panel is single phase 240/120, so if your backup source is 120V you
will need a suitably sized transformer.
Is the "backup" portion of your project a generator only, or a
combination of batteries & generator?
Regards,
Gary Willett, PE
Icarus Engineering / Solar Services LLC
NABCEP Certified Solar PV Installer # 031310-246
On 5/13/2011 7:21 PM, Ray Walters wrote:
HI Allan;
We got some through Northern Tool and equipment.
http://www.northerntool.com/shop/tools/product_200317677_200317677
It's Generac, but it's UL listed, and cheap. (actually its made by
Nexus) As you can see the Cutler Hamer are over $1000.
I've also used their very low cost manual transfer switches from Reliance.
For specialty BOS equipment related to generators, Northern has been
pretty good. You can set up a wholesale acct.
and get another whopping 10% off.....
GTWB with PNM sure is fun huh?
Ray
On 5/13/2011 11:08 AM, Allan Sindelar wrote:
Fellow Wrenches,
Two requests, please, for the same job:
We have a GTWB (grid-tie with backup) job coming up for which we need
to include an ATS (automatic transfer switch). The utility pays RECs,
but the critical loads must pass through the REC meter > main load
center > transfer switch > critical loads panel in order to be
counted. The customer has requested an automatic transfer switch,
rather than the usual manual switch, for this application. It's an
Outback GVFX3648-based system, that may or may not include a PSX-240
autotransformer to produce 240VAC - it depends on whether we have any
mulitwire branch circuits that can't be reconfigured.
My request is for recommendations of a basic and inexpensive, but
adequate and reliable, 30A 240V ATS, to switch from grid to inverter
when the grid goes out. I would also like a recommendation of a 60A
version, either straight 120V or 240V, in case we don't need the
transformer.
The home also will need a full service upgrade. There are now
All-in-one meter base/main load centers offered as PV-ready - to
satisfy NEC 690-64(b)2 bussbar issues. I have seen mention of such on
this list, but can't find the posts. Could someone post or send me a
link to such a panel? We're upgrading the existing 100A to 150-200A,
mainly to correct old New Mexico funk.
Thank you for any assistance.
Allan
--
*Allan Sindelar*
_Allan@positiveenergysolar.com_ <mailto:al...@positiveenergysolar.com>
NABCEP Certified Photovoltaic Installer
NABCEP Certified Technical Sales Professional
New Mexico EE98J Journeyman Electrician
*Positive Energy, Inc.*
3201 Calle Marie
Santa Fe, New Mexico 87507
*505 424-1112*
_www.positiveenergysolar.com_ <http://www.positiveenergysolar.com/>
*
*
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