Wrenches,
A customer dropped off an unusual PV module a couple days ago. It's not
a design that I'm familiar with. I'm hoping that the vast wealth of
distributed knowledge contained in the RE-Wrenches may recognize it and
explain its purpose.
The label looks like a shiny piece of foil, but w
Allan,
I haven't had any off grid, adjustable roof mount systems in years,
but have one coming up. What is the best product these days?
Thanks,
Drake
At 03:40 PM 3/23/2012, you wrote:
William,
All of our off grid is residential. In general we never do ground
mount for off grid. With rare
Kent,
Does it have jumpers that would lower the current and double the voltage?Maybe
unbridged and still attached? I have a dozen Solec modules that were either 12
or 24 volt nominal output.It has been a long time since I was in the J boxes
but it seems like they may have looked as you are des
Nathan,
There are no jumpers, each j-box has a single terminal. It has 4" square
multi-crystalline cells, a 2" bronze colored frame, and measures 17.5" x
42"; just a little smaller than a MSX-60.
Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.com
On 3/24/2012 10:26 AM, Natha
Daryl:
Thanks for the photos and description of the mounts you are installing. We
have installed many of the DPW ground mount systems in similar
configurations.
http://millersolar.com/MillerSolar/Portfolio/ground-mount/engineered_ground_mount.jpg
We are realizing two things:
1. Concrete fo
Kent,
I had modules like those back in the early 1990s, when I first went off
grid. They are designed to be wired in sets of three for 12V nominal,
18Voc. If the EVA encapsulant is a bit browned it is probably leftover
from the Carrizo project, the largest of its time. The Carrizo project
had
Hilton,
That description sounds like some old modules I used to have. I thought they
were from the ARCO project. Same circumstances I think. As I recall the modules
were Tri Lams (not sure on the proper name for them) but they were also 3 in
series for 12 volt nominal. At least the ones I had
Hilton,
The only issue I take with your suggestion that these are Carrizo
modules is that as far as I know, all of the Carrizo modules (used
at the Carrisa Plains PV power plant near Paso Robles CA from
1984-1990) were made by Arco, not Solarex.
Also, the Carriz
Allan,
Your right about the modules from Carrizo being made by Arco. And
weren't they mono-crystalline? Three of these modules in series would be
30 cells and not enough voltage for charging a 12-volt battery. But I
think that's the biggest similarity to a Quad-Lam.
Kent Osterberg
Blue Mount
William,
There are auger mounted systems that don't require any concrete. For
locations with suitable soil, they probably save some time and are a
little less expensive than concrete. But it takes a substantial
structure to withstand 85 mph, or greater, winds. There's no getting
around the ph
Carrizo had a grade of modules that did not see concentrator use, and they sold an assembly of 3 of these called "Super Gold Tri-Lams." I sold a truckload of them, and they are still kicking butt today.The VOC is 20 or 21V. They were rated at 105W but performed as well as the AstroPower 120W modu
Oh, to have 85 mph winds. Code changes just brought us up to 180 mph
design wind speeds in Southwest Florida. Yay.
Jason Szumlanski
Fafco Solar
On Mar 24, 2012, at 5:05 PM, Kent Osterberg wrote:
> William,
>
> There are auger mounted systems that don't require any concrete. For
> locations wit
Many inland areas in California, Oregon, and Washington are 85 mph
zones. I think that's the lowest requirement anywhere in the U.S. I
can't imagine designing for 185 mph winds.
Doesn't that just blow the glass out of the modules?
Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.c
With the change to ASCE 7-10, the uplift calcs are not that much more,
and in some cases less, but I think in any case the concern is
wind-borne debris. If the mod stays attached to the roof, we are good.
Having lived through it, it's all theory anyway. In a hurricane,
theory goes out the window.
> In a hurricane, theory goes out the window.
Or through it .. if it's even still there.
(Apologies all. Engineering humor.)
Dan
--- On Sat, 3/24/12, Jason Szumlanski wrote:
> From: Jason Szumlanski
> Subject: [RE-wrenches] Off-grid ground mount: Can it be done cheaper
> To: "RE-wrenches"
15 matches
Mail list logo
