I don't know for sure, but the S. California installation in the article is
likely a large Unisolar installation down there.
However, since the article talks about Chinese modules, which are mostly
crystalline, I don't think thin film is the major problem, if there really is
one.
Not
What about AUO/BenQ Solar AC Unison modules. We installed 3 systems in late
2011 and they used SolarBridge inverters then. Results have been OK so far.
The data logger was clunky then. We are getting an upgraded version now.
David Palumbo
Independent Power LLC
462 Solar Way Drive
Hyde
Any updated impressions of this product? I'm starting to see an uptick in
these being sold by competitors.
One thing that would be nice is if they eliminated the gateway, allowing
each inverter to connect to the Internet by Wi-Fi. This would eliminate the
extra piece of hardware, and the
Jason
Power One does not eliminate the gateway. The just connect to it by wifi.
David Katz
Sent from my iPhone
On May 31, 2013, at 6:29 AM, Jason Szumlanski
ja...@fafcosolar.commailto:ja...@fafcosolar.com wrote:
Any updated impressions of this product? I'm starting to see an uptick in these
The efficiency is higher at higher voltage.
David Katz
Sent from my iPhone
On May 30, 2013, at 7:12 PM, Jesse Dahl
dahlso...@gmail.commailto:dahlso...@gmail.com wrote:
I was reading up on the SQF pump and do remember seeing something about
efficiency at higher voltages. Can't remember if it
my experience mirrors this too. this was my first ac module installation and
other than dpw screwing up the mount, and the clunky datalogger/internet
interface, the system has performed flawlessly.
todd
On Friday, May 31, 2013 6:28am, Dave Palumbo d...@independentpowerllc.com
said:
I think you misread my email.
That's my point. Why not eliminate the gateway?! Of course, the same could
be said of the Enphase Envoy if they embedded the gateway functionality in
the inverter and just used powerline communication to get to the Internet
via the router with a simple/cheap
First Solar's thin film is definitely part of the industry's early onset
under performance problem.
With monocrystalline under $1/watt, I just don't understand why big
projects are still going forward with thin film.
I would only use thin film for partial shading, or curved, odd shaped
Unfortunately the situation might be a little more simple, and devious, than
that when it comes to the bean counters. Many lease and PPA structures have
the tax equity investors out and gone in five years, and the lease holder
cashflow positive by then or not long after. So if there are
Todd,
The easiest way to do this is to use the Grundfos pump sizing software.
Regrettably, it only runs on a PC. You can input the specs of the module, the
head and the GPD desired and it will size the array for you. Once you know the
# of modules in series you can use the Imp and Vmp derated
Bob-O and Todd,
In theory you're right, Bob-O. I find the program awkward to use,
given that it thinks in some weird (Danish?) way, that I don't use
often enough to remember how to navigate. But in this case my
bigger concern would be how to input data for a
Hi Todd (and Allen Bob-O),
You can also do the pump sizing online, using WebCAPS from Grundfos, if
you don't have a PC handy: http://net.grundfos.com/Appl/WebCAPS, then
click on Sizing, and Renewable Energy Systems. You'll still need to
enter module data, since their database only includes
The point of the PPA is interesting. We have a local investment group that is
using this type of plan on local installs. After 5 years the system becomes
the property of the business/school/city. For the first 5 years it is owned by
the investor group overseeing the project. Typically, who
HI all
All those 75 watt panels were really close to the same parameters.
According to one catalog, it was: 4.4 imp, 4.8isc, 17 vmp, 21 voc
From memory, they did poorly in hot weather, heavy voltage drop.
jay
peltz power
On May 31, 2013, at 10:30 AM, Allan Sindelar wrote:
Bob-O and
Aloha,
We have installed one system so far and it seems to be working and
performing well.
The one thing I have learned is that Aurora micros only have a NEMA 4
rating while all Enphase micros have the NEMA 6. This could be a big
problem down the road perhaps. Also the wireless data monitoring
Hello Wrenches,
How would you rate the SnapNrack mounting systems against Unirac and
other mounting systems?
Thanks,
Drake
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Update,
I have spoken with several installer references provided by ET and Mage.
The ET reference had also done some Mage and BenQ installs. Some
experienced issues with the data logger as described by others here. Some
have received replacement data logging units as Todd described for early
It is my favorite. My crew said they would mutiny if I changed back to
others we have used. Wire management is simplified due to a large channel,
spacing of L feet can be up to 6 feet on a 12 pitch roof. We have tried
many manufacturers and this is all we have been using for the last three
years.
Hands down my favorite to use. Ditto what Daryl says. Wire management is a
breeze. Stamped engineering for my state makes the AHJ happy. Clean lines.
My only gripe is that the ends of the rails tend to be VERY tight making it
tough to install their universal end-clamp if you are in a precarious
We just serviced an old SnapnRack install, and we found the usual: most
of the mounts had been over torqued and the SS bolts had spalled. With
a bottle of anti-seize and a torque wrench we replaced the damaged
hardware and all went well.
I like the end clamp that grabs the module from
The only complaint with the Snapnrack rails is the thin wall can easily be
distorted. This will allow the nut to drop out of its groove. Love the
universal end clamps but have learned to assemble every one to check for
proper fit before getting on the roof.
Jim Duncan
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