http://www.ul.com/global/eng/pages/newsroom/publicnotices/detail/index.jsp?cpath=/global/eng/pages/newsroom/publicnotices/detail/data/ul-warns-of-counterfeit-ul-mark-on-photovoltaic_2013041507.xml
UL warns of counterfeit UL Mark on photovoltaic panels (Release 13PN-20)
*NORTHBROOK, IL -
This is a fairly complicated issue. I agree that an ungrounded
battery system is safer than a grounded one, since the hot wire will
not arc to the casing of the enclosure.
If a system has a charge control and an array, the negative wire of
the array usually needs to be grounded (or have a
Have a client with a new coffee maker that will not run from their new dual
outback setup. Has anyone heard of this lately. We have had no problems with
appliances and sine wave inverters. What to look for?
Sent from Jeremy's IPhone. Sorry for typos and shorthand!
Ray Johnson in Florida has done an excellent job documenting this fiasco on
his blow in the article below and several other articles.
http://www.renewableenergyworld.com/rea/blog/post/2013/04/solar-contractors-installers-beware-of-the-panel-warranty-bait-switch
W
e lost several jobs to this
Hi Drake;
Read down a bit more and 250.166(C) and (D) limit the size of the GEC to
#4 or #6 max., depending on what electrode is used.
This used to not be the case, and systems in the 90s had 4/0 cable to a
5/8 electrode: which just like your 1/2 pipe example was absolutely
ridiculous.
Jeremy,
What to look for?
Unfortunately, probably a different coffee maker.
I've gone through this with several different appliances over the years on
sine wave inverter output. Washing machines, refrigerators, dishwashers it
could be anything with electronics. Specific manufacturers
I'm having a similar issue with a GRID-TIE inverter just now. SMA 5000US which,
when it wakes up every morning, removes the date and time from the programming
in the customers' Monitor brand kerosene heater. They have to re-enter it
daily, which is annoying enough, but when they go out of town,
Ray,
Thanks for the note and I see your point about operating at greater than
50 v. Does anyone else have an opinion on the operating voltage for
batteries? I know that NEC 480.2 defines the nominal battery voltage as 2
volts per cell for lead-acid and I believe I have a code interpretation
Hi Ray,
Thanks for that information. I'm glad they covered that. I never
install more than a #4.
The question I'm still not sure of is weather or not we need to
ground the DC. I always have run a GEC to the DC. It would be great
if we didn't need to do so on the Sunny Islands especially,
I believe these problems are mainly due to the high frequency switching
content of the typical sinewave inverter
these days.
I (and other manufacturers I'm sure) would be very interested to know
which appliances are susceptible to
this noise so that we can try to reduce these
Hi Ray and All,
250.166 says the GEC must be sized as specified in (A) Not smaller than the
neutral conductor, or (B) Not smaller than the largest conductor supplied by
the system, except as permitted by (C) through (E).
A water main [as in 250.52(A)(1)] is not listed as an exception in (C)
First, a water main is no longer allowed to be used as the primary
grounding electrode by itself, it needs an additional electrode added to
it 25053(D)2. You still are required to bond to it 250.104(A)1, but it
doesn't count as the electrode. Also, 250.166 (C) specifically lists
pipe as one
coffee machine is a Miele CVA 4066.
Sent from Jeremy's IPhone. Sorry for typos and shorthand!
On Apr 16, 2013, at 12:46 PM, boB b...@midnitesolar.com wrote:
I believe these problems are mainly due to the high frequency switching
content of the typical sinewave inverter
these days.
I
Colleagues:
I had occasion today to use the Enphase on-line compatibility
calculator. My client bought some modules and M190 inverters from an E-bay
vendor. The exact module model number was not listed on the compatibility
list so I was recommended by Enphase to use the calculator.
The
William,
Unless you're into various forms of self-abuse, I don't understand
why you'd spend time on a system from a customer who "bought some
modules and M190 inverters from an E-bay vendor". The customer
won't appreciate what you offer.
Allan
coffee machine is a Miele CVA 4066
Oh my gorsh !! That's a $4000 coffee machine !!
Sounds like it needs a low pass filter coffee filter though.
boB
On 4/16/2013 12:27 PM, All Solar wrote:
coffee machine is a Miele CVA 4066.
Sent from Jeremy's IPhone. Sorry for typos and shorthand!
If it is useful to you, I can grab a waveform from my scope connected to my
outback and post it.
On Tue, Apr 16, 2013 at 3:27 PM, All Solar allso...@scswifi.net wrote:
coffee machine is a Miele CVA 4066.
Sent from Jeremy's IPhone. Sorry for typos and shorthand!
On Apr 16, 2013, at 12:46
please... and id love to see the harmonics too!
thanks,
todd
On Tuesday, April 16, 2013 5:19pm, Chris Mason cometenergysyst...@gmail.com
said:
If it is useful to you, I can grab a waveform from my scope connected to my
outback and post it.
On Tue, Apr 16, 2013 at 3:27 PM, All
William,
As long as it's a standard 60-cell module, and it likely is (it doesn't show
up on a Google search though), it will work fine with the M190. Just make sure
that the Vmp is in the 30-35VDC range, and the temp-corrected Voc is not over
54VDC.
Brian Teitelbaum
AEE Solar
-Original
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