JASON:
I talked to Steve Capozzi of SolaDeck and he sent me additional info
about the circuit breakers:
_Manufacturer_: ABB
_Terminal Temp Rating_: 75C / 167F
_Reference Temperature_: 20C / 68F
_Ambient Temp Derating_:
30C/86F = 18.7A
40C/104F = 17.3A
50C/122F = 15.8A
60C/140F = 14.1A
70C/158F = 12.2A
My concern is that we may be attempting to use an interior rated AC
breaker in a roof-deck-mounted NEMA3-R enclosure.
In an Enphase application, with the maximum of 17 inverters per AC
Source Circuit, the continuous current will be 0.9A x 17 x 1.25 = 19.1A.
This exceeds the 30C/86F trip current of 18.7A.
The interior temperature of the SolaDeck could very likely approach the
60C/140F trip current of 14.1A.
It seems to me that "nuisance trips" could be a high probability event.
Does anyone have any field experience using this Soladeck option for a
AC Source Circuit Combiner Box (SCCB)?
Another issue, at least in some jurisdictions, is the requirement for a
roof-top AC Disconnect.
The SolaDeck, when used as an AC SCCB, may not meet the NEC Article 100
requirements in some jurisdictions for "readily accessible" because a
tool is required to open it.
Regards,
Gary Willett, PE
Icarus Engineering LLC
Icarus Solar Services LLC
On 11/26/2012 2:21 PM, Jason Szumlanski wrote:
I did get some pictures and info from Soladeck. Here are some links:
Pics:
https://docs.google.com/open?id=1BpiL-1SdSNNsj4wPMQrFCLHH7JT2dek_KftSJl06QLqc0yhJ_1t5oij0aEA6
https://docs.google.com/open?id=1cVuhZGeQNHL1IvGvNBa7v93oZyGBvjxCv5yq4AmoyJeDAITxvgMqgECR2yTv
https://docs.google.com/open?id=1umslTplnFyZG1eNCZE-MMi_OqrSeirFCPRBl9mFNZJ2gQkBjM5LEXnaPKy2l
Specs:
https://docs.google.com/open?id=13KLAuxUHOR9al7-36reDSJJ7IMnqV3ANPnJILPnrj2xcAi0ksRj67ifKIe7R
https://docs.google.com/open?id=1kvPFcDc1vruS3W_aONlXyIHm1T8-qi4vTpTwGGJ7H0eIwuZ-5e6zrM1CcND5
https://docs.google.com/open?id=1lM8FtYl9HiYohru32UA_Gb1tXZKZ5iw-8tnSu1Un6g4vcklLL-DK1qLPMdsB
I was told Soligent can source the combiners for you (and me).
*Jason Szumlanski*//
/Fafco
Solar/<http://www.wisestamp.com/apps/wordpress?utm_source=extension&utm_medium=email&utm_term=wordpress&utm_campaign=apps>
On Mon, Nov 26, 2012 at 1:50 PM, Jason Szumlanski
<ja...@fafcosolar.com <mailto:ja...@fafcosolar.com>> wrote:
I just called Soladeck and they are sending me some more info on
availability. I'll pass it along when I get it. I didn't realize
they made an AC roof mounted string combiner solution. That's a
huge help for 2 or 3 string Enphase installations (they make both
combiners).
While on the subject, we recently started using the Enphase cable
couple with Type TC-ER cable to extend cabling to junction boxes
when necessary... No more wasting trunk cable connectors! I
suppose Type TC-ER could be used all the way to the main
distribution panel, thereby eliminating junctions on the roof, but
I haven't looked into the cost/benefit of that idea.
*Jason Szumlanski*
/Fafco Solar/
On Mon, Nov 26, 2012 at 1:26 PM, Gary Willett
<g...@icarussolarservices.com
<mailto:g...@icarussolarservices.com>> wrote:
NICK:
I could not find the AC model numbers you provided on the
SolaDeck web site. Do you know the manufacturer, and the
voltage and temperature ratings, for the 2-pole 20A AC breakers?
Regards,
Gary Willett, PE
Icarus Engineering LLC
Icarus Solar Services LLC
On 11/26/2012 11:54 AM, Nick Soleil wrote:
Hi wrenches;
SolaDeck Models 0760-41AD and 0766-41AD are rated for up to
60A at 240Vac.
It can be ordered with DIN rail mounted AC breakers and a
combiner kit. The 2 - 20A circuit combiner kit is part 0760K2AC.
I'd recommend checking with a distributor or on SolaDeck's
website for the most current information.
Nick Soleil,
Enphase Energy
On Sun, Nov 25, 2012 at 7:44 AM, Kent Osterberg
<k...@coveoregon.com <mailto:k...@coveoregon.com>> wrote:
My understanding has been that the Soladeck has only been
listed for DC wiring. Perhaps they have a manufacturer
rep on RE-wrenches that can clarify.
Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.com <http://www.bluemountainsolar.com>
On 11/25/2012 6:20 AM, Dave Palumbo wrote:
Rich,
We have been using SolaDeck PV roof mount enclosure.
NEMA 3R with a flashed
penetration. Can use for combining, or simply as a
pass through box.
Dave
David Palumbo
Independent Power LLC
462 Solar Way Drive
Hyde Park, VT 05655
www.independentpowerllc.com
<http://www.independentpowerllc.com>
NABCEP Certified PV Installer
Vermont Solar Partner
25 Years Experience, (802) 888-7194
<tel:%28802%29%20888-7194>
-----Original Message-----
From: re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>
[mailto:re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>]
On Behalf Of Rich Nicol
Sent: Sunday, November 25, 2012 8:11 AM
To: 'RE-wrenches'
Subject: [RE-wrenches] Best practices for conduit
penetration on roof
Wrenches,
We typically run conduit for roof mounts over the
edge of the roof to the
eaves, rather than penetrate the roof whenever
possible. An upcoming
installation on an freshly asphalt shingled roof
requires that we penetrate
the roof for the conduit run (Enphase). I'm wondering
if there are any
suggestions for preferred flashing products and best
known practices. It's
always seemed to me that the typical Oatey type
flashing dries and cracks
eventually.
Thanks for your insights..
Rich
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