Jeff- The Sunny Boys can be reprogrammed into off grid mode so they
can work between 56-64 Hz, but I believe you need both a service cable
and a call to SMA tech support to make that happen. They then note in
their system that that inverter's been adjusted to no longer meet UL 1741.
Jeff Yago
Wrenches,
PVWatts does not accurately predicate Unisolar and Sunpower module performance
because it uses a generic single crystal silicon solar module power temperature
coefficient (I think -0.4% per degree C). Does someone have the technical paper
that specifies PVWatts module temperature
It seems to be -0.5%/degC:
http://rredc.nrel.gov/solar/calculators/PVWATTS/moreabout.html
Original Message
Subject: [RE-wrenches] PVWatts Module Temperature Coefficient (was
Enphase derate)
From: Joel Davidson joel.david...@sbcglobal.net
To: RE-wrenches
Hello
I have used the T80HV and no problems. HOwever I am not as close to the limit
as you are. My app exceeded the T80 and Flexmax 80 voltage limits, it has been
awhile and I do not remember the exact specs. I also just accept the data it
presents, I have no indication that it is
We have had a regular Apollo T-80 for quite a while, and the energy
monitor in it works very well. Our system also has an E-meter, and they
generally agree. If they don't agree perfectly, in my opinion the
Apollo is more accurate (as the Apollo monitor does re-set to full when
the charge
Hi Drake;
I have kids, and I agree with you; an exposed ground rod would be a nasty thing
to land on.
I always had a fear of falling on one with my knee (ugh!), however, I have had
inspectors require 4 of ground rod above grade.
(most installs in New Mexico I see keep the connection above
Here is another widget that might be worth looking at.
It seems to be priced around the TED option, but may have more bling.
-Glenn Burt
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Philip
Boutelle
Sent: Tuesday, April 13,
Esteemed wrenches,
Any assistance here would be greatly appreciated.
Does anybody know of a comprehensive list that tells what modules have
PV wire and which ones have only USE2? The thought of contacting every
PV module manufacturer and extracting this information from them is
very
Hello, Marv all~
I assumed that pv wire versus regular XLPE wire was non-relevant for the
Enphase inverter architecture. Did that change...or will it change in the
near future?
If I'm asking before Enphase is ready to answer that's OK, but kindly post
an update to this topic when the time is
Wrenchers,
Looking for advice on the following pump. Lorentz PS600-HR04H-1-48B with
power pack option and controller.
I will be doing an off-grid system for a homeowner who already who had
purchased this pump, in fact it is down the well already, although not
working, or even wired to
For a straight grid-tie system@ 10 degree tilt, 180 azimuth, zero/little shade,
NYC avg 4.29 kWh/m²/day.
Feed an SMA7000 with (3) strings of 11 Suntech STP275's [9.075 kWdc]
Or
Do strings of 10, so itd be 8.250 kWdc into the 7 kWac inverter.
Strings of 11= 491.7 Voc; 386 Vmp
Strings of 10= 447
Is using the SMA SB 8000US out of the question?
http://www.sma-america.com/en/products/solar-inverters/sunny-boy/sunny-boy-5
000us-6000us-7000us-8000us.html
On 4/19/10 3:37 PM, Jim MacDonald j...@solaresystems.com wrote:
For a straight grid-tie system@ 10 degree tilt, 180 azimuth, zero/little
We have been installing the grounding electrodes in small round cement or
plastic vaults as a great way to inspect the connections but reduce the
hazard.
Sincerely,
Chris Worcester
Solar Wind Works
NABCEP Certified PV Installer
Phone: 530-582-4503
Fax: 530-582-4603
www.solarwindworks.com
Many times we switch to another module manufacturer as one will not
fit or another inverter manufacturer.
PVPowered has a more relaxed window and we have had fine success with
them when SMA does not fit.
Cold is the dictator and the 600 VDC threshold.
Thanks, Dana Orzel
Great Solar
Hi All,
I'm doing some consulting for a group bringing small PV to Africa.
Who are best contacts in our circles from SELF or SELCO or equivalent
that I can talk to with field experience with charge controls,
batteries etc in hot arid climates and need for cultural sensitivity.
I'm looking
The temperature correction is the concern. I have heard lots of stories of
inverters dieing when it gets to cold. Look in the code book 690.7 at the
temperature correction table. Go to weather.com and find your record low
temperature. Find you Tc factor and will your senerios work? I have
I believe the concrete vault is an F-8 with about a 10 dia round concrete
lid marked ground, or sometimes we'll just grab an irrigation round vault
with the green lids if it's not going to be looked at too closely.
Sincerely,
Chris Worcester
Solar Wind Works
NABCEP Certified PV Installer
SB8000US only good for 480 Vac, we’re tying in at 208.
11 strings has been calc’d to be OK (600vdc) for record low -4 fahrenheit (-20
celsius).
I think the big concern as mentioned is getting the Voc high early in the AM to
wake the inverter up, also maintaining the Vmp later in the day to
Im sorry, I meant to write “11 modules per string” below..
Been a long day..
From: Jim MacDonald
Sent: Monday, April 19, 2010 7:41 PM
To: RE-wrenches
Cc: Jason Szrom
Subject: RE: [RE-wrenches] overfeed 7kW gridtie inverter or drop a mod per
string?
SB8000US only good for 480 Vac, we’re tying in
Wrenches,
There was a thread last year about Service Magic's lead generation
"service". At that time, the strongest message I heard was not to let
them in, because their leads are seldom good and you can't get rid of
them. I don't think that I recall a single positive review of them on
this
Wrenches,
A distributor told me today that Kyocera is currently out of KD135s,
backordered until next month. With relatively few good 12V modules
available these days, anyone know of a good distributor with KC125,
KC130, or KD135s in current stock?
Thank you,
Allan
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