REC Group in Norway has taken the high road in dealing with the junction
box problem on modules they made in 2008. The problem is old news. REC
discovered that the junction box they were using, which connected to the
tabing material coming out of the back of their modules with a
compression co
wrenches,
the defect in REC panels is the frame expands past the panel and can contract
and break the glass. Unfortunate, but no big deal in a lot of ways. I dont know
if there is another defect, but that one would warrant a recall instead of
replacing a lot of panels. There was also an articl
Correcting myself here. That should be (TMP) in the first parenthesis. I
should have known better to mix TMP with TPM's (Top of Pole Mounts). Maybe
that's telling me something.
DP
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of
Hey Larry,
Have you worked with the Techno Metal Posts (TPM) for 6" SCH40 (orSCH80) top
of pole mounts? I have heard of the TMP's being used for multi pole ground
mounts and my Vermont TMP franchisee wants to do some single pipe mast DPW
top of pole mounts with his TM Post.
Dave Palumbo
Thanks for posting this, Marco.
Somehow I missed this story last week. Funny in an ironic, twisted way. A
friend of ours was in town visiting this afternoon. He mentioned that he was
considering buying some REC modules out of Norway... Good deal on them, etc.
(Can't tell ya the price he mentioned
Just to add to the battery confusion, I have found the Rolls last longer and
behave better is charged slowly. I have some very fast charging AGMs I have
only had on set of gels.
DT
--- On Tue, 6/30/09, Walt Ratterman wrote:
> From: Walt Ratterman
> Subject: Re: [RE-wrenches] Solar Boost C
Hi All,
Unistrut makes a telescoping set called get this telestrut.
Pretty close to what you are discussing.
But does anybody know if Powerstrut makes the same?
My supplier only carries Powerstrut?
Thanks,
jay
On Jun 30, 2009, at 5:47 PM, R. Walters wrote:
I just looked at the Techno Metal P
I just looked at the Techno Metal Post website; looks like a great
product for the PV biz. I wonder if they could be adapted for
grounding systems?
Ray
On Jun 30, 2009, at 6:23 PM, Larry Brown wrote:
Keith,
We have had good success with TechnoMetalPosts for ground mounts
No excavation, no
Keith,
We have had good success with TechnoMetalPosts for ground mounts
No excavation, no concrete work and almost no disturbance to the site
They have been running about $225-250 per post installed and a
stamped engineering report for the local Building Department
Larry Brown
Sun Mountain
O
Hi
I have a solar friend who is looking for some feedback on cost per footing for
a small residential ground mount system in Northern CA. Do any of you have a
cost estimate/assumption for each sonotube and concrete mix? What have been the
general requirements for diameter and depth of the footi
Anyone else out there horrified by this kind of news from REC Solar in
Norway? WTF?!
marco
REC to Recall All of Its Solar Panels From 2008
Thursday, 18 June 2009 13:43
Greentech Media
Renewable Energy Corp will repair or change all of the solar panels it sold
in 2008 and a quarter o
Morningstar SunLight SS-10L-12v.
Allan Sindelar
al...@positiveenergysolar.com
NABCEP Certified Photovoltaic Installer
EE98J Journeyman Electrician
Positive Energy, Inc.
3201 Calle Marie
Santa Fe, New Mexico 87507
505 424-1112
www.positiveenergysolar.com
-Original Message-
From: re-wrenche
I would recommend the Morningstar controller. There is a model (I don't
have the catalog here) with a good timer, and LVD and good environmental
controls, and electronic circuit protection.
Walt
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun
Hello Wrenches,
I have an 12-volt, 1.2-amp outdoor light that I want to power with PV and a
gel cell battery. What approx. 5 amp charge controller do you recommend? It
would be nice to also have a low-voltage cut-out and a timer. Thanks in
advance for your help.
Best regards,
Joel Davidson
Hello Larry and others..
The slow charge rate for the Gel's you mention confuses me further. I had
just finished researching this last week when I was in Sierra Leone, where
we were setting up the DEKA 225AH Gel batteries on an Outback system, and
checking the charge rate.
I downloaded a c
Larry,
You're absolutely right in your first paragraph about one thing that I
stated incorrectly: MPPT is for harvesting the most power possible from any
voltage being produced above the battery voltage. I meant the difference
between Vmp and Vbatt, not, not the difference between Voc and Vmp. Tha
Hi Walt,
You are right! Gel batteries will give many more cycles than AGM's.
And they cost more so you you are not getting an equivalent value by
them suppling AGM's.
A very big downside to Gel is if you accidently over-voltage the
battery, you can permanently ruin it. I have seen many ba
Hello,
Why do you say that AGM batteries are a better choice?
I have been reading about the differences, and all I see (comparing DEKA Gel
versus DEKA AGM is that the cycle life of the AGM (at 50% DOD) is 500 cycles
versus 1000 cycles for the Gel.
The AGM seems to have better resistan
Allan,
MPPT technology is for harvesting the most power possible from any
voltage being produced above the battery voltage, not the difference
between Voc and Vmp. Because of this, nearly every battery charging
system will benefit from MPPT chargers. The climate does not matter
for prope
I didn't say it's an incorrect use. Please reread what I wrote. I agree it's
one of its biggest advantages.
But in Africa, once it fails it may be very hard to find a technician who
can determine what controller to replace it with if the SB50 fails. (They
aren't serviceable in the field, but m
Not sure why you think that cell matching is an incorrect use for MPPT. That is
one of it's biggest advantages.
..
Northern Arizona Wind & Sun - Electricity From The Sun Since 1979
Solar Discussion For
Hello Everyone,
The SB50's maximum input voltage spec it 57VDC. This should be considered an
absolute maximum above which the controller will be damaged in a manner not
covered by warranty. Our recommendation is to not apply a total Voc at STC of
more than 57V/1.25= 45.6V. There are transient
Yes, that is one I had forgotten about. The 100/20 and 100/30 have a max Voc of
95 volts so it should have no problem with those panels.
..
Northern Arizona Wind & Sun - Electricity From The Sun Since
Walt,
I would look at using the Blue Sky 6024H in 36v input, 24v output mode. The
physical dimensions are identical, and it can use the same temperature
sensor (if the systems don't currently have temp sense, btw, add it.
Absolutely). I still believe Rick's controllers are some of the most
effic
The AGM batteries are probably a better choice than gelled, but the fact that
some are down to 5 volts is the real problem.
A typical AGM will lose around 1-2% charge per month at 25 degrees C. If they
are at 5 volts, that indicates that they either sat around for over a year
unused and uncharg
Chiming in with another suggestion for an alternate charge control, I would
look closely at Phocos. I've sold several of their early generation MPPT
controllers and none of them have broken so far...even though some went to
hot climates. The new version has firmware upgrade capabilities if you get
alt,
In addition to those possible replacement controllers you mentioned,
you might add the BZ MPPT 500 to the list. I've had a few issues with
them but that seems to have mostly sorted itself out. Very reasonably
priced for a MPPT controller, 100 Voc input. The catch is you've got a
500W
Marco,
I called about this recently. They say it's in production now and
should be available through distribution by the "end of the summer."
-Nik
On Mon, Jun 29, 2009 at 4:56 PM, Marco wrote:
> Any one know anything about when the Bluetooth-version of the Sunny Beam is
> going to start ship
Hello all,
Thanks to all of your responses, and particularly Rick’s confirmation of the
appropriate ranges for the SB50, it has become clear that these panels can not
be made to work with the SB50, and that the SB50 was the wrong choice for these
pre-fabricated systems, or perhaps better phr
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