Wrenches,
I was just complementing the US Treasury on there swift response to
the grant application.
My customer submitted his application on the 13th of January. We
received this response on the 26th (10 business days later).
===
From: treas1...@n
The serving transformer is also an issue. I've seen 800-amp service
conductors on a 25kVA transformer. Just because you have wires large enough
for a 400-amp service, does not mean you have a transformer capable of
delivering 400-amps continuous. That is why you have to work with the
serving utilit
Sometimes utilities will set a max too- here in Florida the
investor-owned utilities have a rule that you take (d...@stc) x 0.85 to
get the "AC equivalent" size of the array. That size then can't exceed
90% of the service rating. Not sure if this is an issue in other states.
Scott McCalmont wr
Mick,
Silicon Energy (www.silicon-energy.com, Arlington, WA) sells PV
modules with a glass back sheet that are see through. They are
heavier and pricey, but have a unique module design and mounting system.
Randy Brooks
Brooks Solar, Inc.
Solar Power for People
140 Columbia View
Chelan, WA
Going all the way up to the rating of the service might not be such a good
idea. The utility may use smaller wires for the service drop than you would
expect based on the ampacity tables in the NEC. Considering the example of a
400 A service:
- PG&E (local utility) requires 350 kcmil Aluminum cond
Suntech Semi-Shade modules have a clear backing.
On Thu, Mar 4, 2010 at 12:15 PM, Mick Abraham wrote:
> Hi, Mechanics~
>
> I like the Sanyo bifacial PV modules for several reasons but I guess the
> biggest reason (for me) is the way they transmit light between the
> cells...due to the clear back
Kirpal,
That was always my interpretation as well. So in the case of a 400A
service, I can backfeed 400A when utilizing a supply side connection.
Others have thoughts on this?
- Mike
--
Michael Kelly
Project Manager / Project Engineer
NABCEP Certified Solar PV Installer ™
SolarFlair Energy, Inc
Mike.i may be wrongbut I think i am rightyou are limited by the
wire size feeding the supply and/or the transformer size which supplies the
service.depending on the physical location of the tap you may be limited
by the enclosure and the enclosure ratings as well
would love to hear
Hi All,
Next to grounding, I find the calculation of the maximum amount of backfeed
current allowed in a supply side connection to be the most vague issue in
Article 690. Let's assume we have a 400A, 480/277 service in a commercial
building, a 400A main service disconnect, and the jurisdiction is
Hi, Mechanics~
I like the Sanyo bifacial PV modules for several reasons but I guess the
biggest reason (for me) is the way they transmit light between the
cells...due to the clear backer sheet. This seems dandy for carports, picnic
shelters, etc.
The $/watt for the Sanyo bifacials affects the pay
In the past, I have needed 6 acre/MW for poly arrays
Nick Soleil
Project Manager
Advanced Alternative Energy Solutions, LLC
PO Box 657
Petaluma, CA 94953
Cell: 707-321-2937
Office: 707-789-9537
Fax:707-769-9037
From: Scott McCalmont
To: RE-wrenches
Sen
Aloha Folks:
NREL had a book list order form years ago (which you could download
online), and you could check any of the books you wanted, and they would send
them to you for free! This irradiance data book was one of the free books I
got at the time, plus others on BIPV and other topics.
Anyone know of a source for a SMA 2100? or any reasons for this inverter
being hard to find?
Gary Easton
Appalachian Renewable Power Systems
NABCEP Certified Solar PV
NABCEP Certified Solar Thermal
740-277-8498
> Thankfully my MX60's software is old enough to still have an option to
> control it'
Can't put my hands on the equation for determining cost per kWh of a system.
Brain seems to have ground faulted in remembering it correctly. Potential
client with multi-oriented roof needs substantiation of additional upfront cost
of micro-inverter vs. string inverter.
Thought for the day:
The
I have never been able to get my generators to connect w/ a grid tie
inverter. The Kohler 20kW Isochronous generator electronic AVR doesn't nor
does the smaller Onan, Honda or even I had a customer w/ 125kW & the SMA
wouldn't latch on despite the quality of power tiring to connect w/o a load.
I t
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