The answer to systems not being used is nearly always leave them on float.
However, 2 amps seems a bit high for AGM batteries unless you have some kind
of phantom load.
Equalization for AGM's is different and for a different purpose than with
flooded. The current should be quite a bit less
AGM
batteries in good condition and fully charged will consume approximately 1
milliamp per rated amp-hour in float mode at 25C. Thus, your 250
amp-hour battery will require 250 milliamps at the manufacturer's rated float
voltage (including temperature compensation).
Discussion now turns to
Project:
43kw system originally designed as grid-tie. 208 3ph, 6 SB7000(208).
Equipment already rec'd.
The curve ball.client now wants some back-up capabilities that include
solar..there is a 7.92kw sub-array in the system that may be part of the
solution. Any thoughts?
Holt E.
Thanks Dan and Warren. The phantom load might be the Xantrex Prosine
inverter. I'll check to see if the inverter is turned off. - Peter
Peter T. Parrish, Ph.D., President
California Solar Engineering, Inc.
820 Cynthia Ave., Los Angeles, CA 90065
CA Lic. 854779, NABCEP Cert. 031806-26
Wrenches,
We have a project coming up that includes penetrating a copper roof with our
PV conductors. What are your preferred methods for penetrating and flashing
the conduit (going into a gable wall is not an option.)
Thanks in advance.
Best regards,
Nik
--
Nicholas Ponzio
Building Energy
Nik,
Is your concern the dielectric action between the copper roofing and a
conventional galvanized roof jack?
Bill
Feather River Solar Electric
4291 Nelson St.
Taylorsville, CA 95983
- Original Message -
From: Nik Ponzio
To: RE-wrenches
Sent: Monday, February 01,
Kelly:
A big a** generator and a transfer switch.
William Miller
PS: Seriously, I have seen projects like this and rarely is there a
natural subdivision in the power distribution that allows one to back up a
portion of the loads. Backing up a huge power demand, which I assume this
is, is
Hi fellow wind wrenches,
We are searching for a reasonably priced add on wind data monitoring system
that is fairly accurate to put in our quotes. What do you recommend? We used
to use the NRG Wind Watcher Data Logger Kit, and the NRG Wind Explorer kits.
These appear to have been replaced by the
Hello All,
I am looking for 2 - Laing D5 solar 090 pumps [PV direct 12 vdc] with
flanges ants bleeder ports.
Conergy sold out and Innovative Solar who bought the Dankoff line now does
not carry them.
Any suggestions?
Please contact off list if you supply.
Thanks
Dana Orzel
Logic energy sell a stand alone wind logger that can be used with
various anemometers including the NRG maximum 40. They also do a web
based logger that is very easy to set up, and stores data online.
You can see an example of their web widgetry on my
http://www.scoraigwind.com site. It
Thanks to all for the quick response, and these are just the ticket! Nice
going as usual, thanks guys.
Sincerely,
Chris Worcester
Solar Wind Works
NABCEP Certified PV Installer
Phone: 530-582-4503
Fax: 530-582-4603
www.solarwindworks.com http://www.solarwindworks.com/
William,
I would agree with generator only if there was the load demand. One thing I
failed to mention is that this will be back-up for lights and communication for
the campus police w/ 24hr autonomy. It looks as though the Sunny Island route
is the most practical at this stage, but I am open
Hi Jim. What do you have in the way of a remote data monitoring board for a
12 year old 10 kW Bergey w/a Grid Tek inverter? There are two (I think)
anemometers and a wind vane on the existing 120' tower as well. It is the
Liberty Science Center in Jersey City, NJ. I will be taking over the
Esteemed RE-Wrenches:
Have any of you had experience with using fiberglass reinforced epoxy
conduit manufactured by FRE Composites (Quebec, Canada) instead of rigid
conduit on the roof? I am concerned about the manufacturer's claim that the
FRE conduit UV resistance is adequate for rooftop PV
Sorry folks, this was intended to reply just to Jim. Pilot error...duh.
Roger Dixon
Certified Wind Site Assessor
Distributor Installer of Solar Wind Energy Systems
Skylands Renewable Energy, LLC
908.337.2057 cell
908.730.6474 fax
roger.di...@skylandsre.com
www.skylandsre.com
Note: The
Paul -
Is it UL listed?
Is it approved for direct sunlight?
Is it NEC approved?
Fiberglass has not had a good reputation in direct sunlight in my
experience.
I am curious mostly as to its approvals.
Dana Orzel
Great Solar Works, Inc
www.solarwork.com
E -
Hello, Holt et al~
If the client only expects 24 hour autonomy, you could build/supply an
uninterruptible power supply for the police loads only, with no solar
recharge dedicated to that system. This would involve inverter/chargers,
appropriate safety gear some monitoring, and a battery bank big
I second Mick's appraisal here. I have clients that need 24/7 for computer
but for only a few lighter loads and this has worked out well. They had
frequent outages and very dirty power. They had lost a number of pieces of
equipment to the surges. We used Outback with AGM batteries and a grid tie
Would it be possible to configure some Sunny Islands with a Sunny Boy
on the 7.92 kw Sub Array?That might work with the new SB 8000US.
At 10:52 AM 2/1/2010, you wrote:
Project:
43kw system originally designed as grid-tie. 208 3ph, 6 SB7000(208).
Equipment already rec'd.
The curve
How about an all neoprene roof jack?
Bill Dorsett
SunwrightS
1715 Leavenworth
Manhattan, KS 66502
Home/Office 785/539=1956
Cell 785/564-2583
wmdors...@sbcglobal.net
See Amory Lovins July 08 on Charlie Rose
http://www.charlierose.com/guests/amory-lovins
--- On Mon, 2/1/10, frenergy
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