Hi Joel,
1. unisolar 64's and sharp single cystal
2. SMA inverters
3. Arcata California
4. exact, I mean side by side with no shading, same azimuth ( south)
same tilt ( can't remember)
5. As to the unisolar producing more, I must stress that I have never
seen the Unisolar produce more
Hi Ian,
There was a fat spaniel site for it.
I can ask to see if this can be posted,
jay
peltz power
On Oct 31, 2008, at 12:55 PM, Ian Woofenden wrote:
Hi Jay,
Is there documentation available on this side-by-side comparison? URL?
Thanks,
Ian
Hi Geoff,
In regards to the performance
Hi Geoff
The Unisolar have the same cells just in different number of cells which
determines the lengths. If the cells have similar exposure, all that is
needede is the same number of cells in each string. Each cell has the same
current thus each string wheather composed of 9 foot or 18 foot m
Geoff,
When you mentioned "plenty of partial shading", that settled the issue
for me. Every cell in Uni-Solar modules have a bypass diode allowing
them to handle shading better than any other module I know of. For
potentially shaded areas or high ambient temperatures, it is our
module of
What we have done a couple times is to install a 15 amp breaker in the epanel
and wire in an outlet then plug a 12 vdc transformer into it.
when the generator kicks in the transformer turns on and it all fits neatly
inside the epanel.
Alternative Energy Systems of Maine
57 Hemlock Rd
Corinna, Me
The units have a w 12 volt source at the solenoid valve if it is propane.this
source can also be used for the GSM w/ the XW inverters.
Sent via BlackBerry by AT&T
-Original Message-
From: John Raynes <[EMAIL PROTECTED]>
Date: Fri, 31 Oct 2008 17:11:38
To: RE-wrenches
Subject: Re: [RE-
If switched 12V isn't readily available from the generator as
configured, couldn't you add a relay with 120 or 240 volt coil across
the generator outputs, whose contacts (or solid state outputs) would
switch 12V battery power as a signal line to the AGS? I realize it's
more stuff to wire in bu
You may want to look through the 2008 NEC articles 500 to 516. I have
visualy seen one system by a propane tank, ground mount and it was well
shielded between them.
On Fri, Oct 31, 2008 at 4:00 PM, Phil Schneider <[EMAIL PROTECTED]> wrote:
> Wrenches,
>
> Anyone out there have experience installi
AHHA, OK, Now I see...
Sorry. Nevermind.
Say no more !! Wink Wink... Nudge Nudge...
Thanks,
boB
David said:
Hi boB,
The Kohler RES is is a very simple 2 wire start as are all of the Kohler's
that I know of. These Kohler's have worked very easily with OutBack and
Trace inverters ov
Is this a propane generator? If it is, all propane generators that we have
dealt with (Kohler included) have a 12 v solenoid on the propane regulator
where the propane line enters and is attached to the generator. There
should be two wires going to this solenoid 12+ and common. When the
generator s
Wrenches,
Anyone out there have experience installing PV on a fuel station canopy?
I'm interested to know what special considerations there are for managing
the DC electricity and potentially flammable location. Thanks...
P.
Phil Schneider
Creative Energies
__
Hi boB,
The Kohler RES is is a very simple 2 wire start as are all of the Kohler's
that I know of. These Kohler's have worked very easily with OutBack and
Trace inverters over the years fro remote automatic start/stop control.
The problem is in getting the Magnum AGS module 12v power when the gen
Hi David.
Gary Baxter says he apologizes for not having that exact wiring diagram
for the Kohler RES generator
and the answer you got over the phone. (we gotta get him on this list
too soon)
Magnum Energy does rely somewhat on customers to help with different
generator wiring if they hav
Hello Jay,
Sounds like something is wrong other than Unisolar vs. crystalline. All things
being equal, the Unisolar should produce more kWh per kW than crystalline.
Questions:
1. What modules and how many of each?
2. What inverter or inverters?
3. Geographic location?
4. Array azimuth and tilt?
String 2 has a bad diode on the
> 3rd panel in and is reducing the Voc of that string by th 2 panels ahead of
> it in the string. I am hoping to figure this out without removing the
> entire string and checking each panel if possible.
> I think the Vmp is equal due to the fact that
Hi Jay,
Is there documentation available on this side-by-side comparison? URL?
Thanks,
Ian
Hi Geoff,
In regards to the performance between Unisolar and crystalline,
there is a side by side ( same watts, batteryless intertie with
metering) installation up here on the North coast of Califor
due to the fact that both strings are paralleled in
the inverter and the 1st string is being pulled to the same level V as the
2nd string under load..Is my logic good?
Thanks for the help and advice.
Cheers,
Kirpal Khalsa
Renewable Energy Sytems
-- next part -
Wrenchsters,
We have a new 3.4kW PV off grid installation that includes a Magnum ME-AGS
Auto Gen Start module, Magnum ME-RC50 Remote Control, MS4448AE inverter and
a Kohler 8.5 RES lp gas generator for automatic backup battery charging (16
L-16G's).
We have successfully used a Magnum AGS control
Geoff,
The ultimate issue is how many cells are in each series string and is the
voltage of the cells nearly the same. As long as the number and the voltage
of the cells match up for each string, it makes no difference what
arrangement the modules are in.
You could have 5 + 6 + 7 = 18 cells
Kirpal,
When you parallel, your voltages have to be the same, so you are correct in
that assumption.
Your assumption about the diodes is not correct. Diodes don't work like
that. You could have a shorted module (all three diodes shorted) which would
lower the Voc by one module. It looks lik
Hi all. In addition to being a solar and wind system consultant and
author, I'm an officer on a volunteer fire department in a remote area
of the Northern Colorado mountains. About 5 percent of the residences in
our response area are off-grid, though the gridless area comprises over
75% of the
Greetings all..I was hoping i could have someone help me confirm a
troubled series string on a system we have installed.
System consists of 16 BP 170 W 24V nominal modules..2 strings of 8
modules.Vmp of each module is roughly 34V and Voc of each module is
roughly 41V. One string is
Hi Jay,
From my own Unisolar installations, and many comments from installers
all over the US, I have to say that the system on the North coast is
some kind of an anomaly if it isn't performing at least as well as a
crystalline system of = power rating at the same or similar site with
the sam
In 2006, I managed a research project here in Hawaii sponsored by our local
utility and the Electric Power Research Institute (EPRI) that did a 6-month
side-by-side comparison of Uni-solar 64-watt modules and a leading
single-crystal module. Utilizing detailed system monitoring (Fat Spaniel),
We have UniSolar on an East face and Kyocera on a West face. UniSolar
outperforms Kyocera in my opinion, but we will stick to solid crystalline Si
for residential/commercial work for space efficiency and racking/mounting
ease. Nothing scientific because it's not side-by-side, but the lower
ener
You are correct and they are not. The entire string or array will drop the
lowest performing panel and seriously detain performance.
On Thu, Oct 30, 2008 at 2:29 PM, Geoff Greenfield <[EMAIL PROTECTED]>wrote:
> I thought I knew the answer to this one, but wanted to run it by the list.
>
>
>
> We
Hi Geoff,
In regards to the performance between Unisolar and crystalline, there
is a side by side ( same watts, batteryless intertie with metering)
installation up here on the North coast of California, and the the
Unisolar is the constant under-performer. This includes cloudy,
sunny, wa
This is very similar to the old argument (sales pitch) that single-crystal
panels are better because they have better low light performance.
While basically true, it is meaningless. Getting an extra 10% when your light
levels are down to 2% of full sun is almost totally irrelevant. One of phrase
As a follow up to my uni-solar post (and thanks to all who provided feedback),
I have a second request:
Any references to recent side-by side "shoot-outs" between Unisolar and
conventional crystaline PV? Scientific studies? Your own wrench thoughts?
I am more and more often encounter
Thanks Tony - yes, that approach makes perfect sense. Unfortunately, this
design ends up with plenty of lower voltage strings paralleled with higher
ones.
For a brighter energy future,
Geoff Greenfield
Founder and CEO
Third Sun Solar & Wind Power Ltd.
340 West State Street, Unit 25
Athe
Manual refers to a maximum pressure, not an operational pressure, ie:"
< 72.5 psi" This is fine for both open and closed loop systems as most
mains operate below this range, and the TNP on most solar pump stations is
set higher than this value.
Thanks -
Dana Orzel
Great Solar Works, Inc
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