We switched over a couple of clients with the same
situation, hard to access and not consistently there, from
wet L-16's to the sealed Full River DC-400 [6VDC each]
battery and the client is very happy. We are about 1 year
down the road and we are thrilled to no get panic calls
anymore.
I have
William,
You might also check out the Concorde SunXtender PVX-4050T,
http://www.sunxtender.com/solarbattery.php?id=30. We have never had
a failure, and we have one pair of PVX-2580s in off-grid use since
2000. Also, they're manufactured in SoCal, so freight should be
Colleagues
I need to replace batteries for a customer. They have Trojan L-16
batteries in an infrequently occupied vacation home. Maintenance has been
an issue due to the infrequency in which the customer is on site. I think
VRLA batteries are indicated.
The enclosure is built for L-16 si
a grid-tied inverter would spend the first day of this example
totally offline.
This issue is different from keeping the frequency within it's
regulated limits. It's keeping the average frequency very precisely
constant, which is expensive as they say, and probably not important.
Frequency
Hi Dave,
Just got back from from four weeks overseas plus a two-week
domestic road trip and am still unwinding (decompressing?).
Need to readjust the caffeine intake accordingly.
I accidentally multiplied the 20 minutes by 60.
Your value is correct .. and an even smaller error.
Thanks for keepi
Dan, I think we're only looking at an error of 20 minutes per (8760 hrs
x 60 min / hr) = 0.00381%, well within the frequency drift allowed under
UL 1741. So as you point out, it would only be the shorter excursions
away from 60.0Hz that would be the issue. This shift isn't the easiest
thing in
A max of 20 minutes error per year (as stated in the article)
equates to an error of 0.228%.
Whether grid-tied inverters stay on line or not depends on
the ultimate range of the frequency excursions permitted
during the tests. UL1741 limits are 59.3 to 60.5 Hz for
fixed frequency settings. The c
I saw a new pole mount rack at the MREA that has built in enclosed wire
channels.
It is very sturdy, heavy and does not use the panels as a structural member.
It is stiff without the panels help.
I think the company that builds it is operated by a NABCEP installer
The web site is http://www.uss
This will make it interesting to everybody with a grid tie inverter, can we
open up the specs to let them work with the "new test variation"? The other
option is that the inverters will spend a lot more time off line.
Bob Ellison
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wr
It would be good to know how much variation. Is
it going to shut down our inverters? What about
UL 1741? Can we adjust the tolerance?
At 01:44 PM 6/26/2011, you wrote:
I saw this as well, came over the AP news wire on Friday, June 24th.
I've been trying to figure out what they hope to ga
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