PV Watts does not account for shading / etc.
The NREL SAM model does a better job but is complex (as are most of the good
models).
We use PVSyst which has models for module level electronics.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway
from the IV curves for each string.
A couple of iterations should get you really close to where the array will be
and let you estimate the reduction in energy yield compared to an optimal MPP
on each string or module.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies,
at string
will be lower.
Since the current changes as the modules move towards Voc you will need to
iterate the calculation a couple of times to get close to the actual operating
point and estimated reductions in energy yield.
Best Regards,
John Berdner
General Manager, North America
SolarEd
inside.
I have also used empty paint cans to good effect.
I put a card inside with my contact info on it so the guy who has to do it
years from now knows who to call for support.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont
- (all ungrounded conductors).
I am pretty sure the SI is not internally bonded to ground.
This is normal in the rest of the world.
Mine are running with an ungrounded battery and there isolation between battery
and ground.
Best Regards,
John Berdner
General Manager, North America
SolarEdge
Ray:
Adjustable ramp times are becoming a common requirement in EU countries with
high penetration PV.
We can adjust in the seconds to minutes (a few thousand seconds) time frame.
I can dig up details if relevant.
Best Regards,
John Berdner
General Manager, North America
SolarEdge
equivalency
to a single larger conductor.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200, X 747
M: 530.277.4894
From: re-wrenches-boun...@lists.re
/0 each, etc.
There are some related requirements for conductor routing and equipment ground
conductors as well.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200
ss washers in the current
path, i.e. not between the terminal and the cable ends.
It might seem ok during basic testing but during a long high current charge or
discharge the stainless washer will get very hot and bad things can happen.
Best Regards,
John Berdner
General Manager, North America
000Vdc inverters are all available today.
I believe 600Vdc commercial and utility scale systems will rapidly become
uncompetitive and, within a few years, the exception rather than the rule.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway B
r than the
"standard sized wires"
Conduit is not an issue @ 1000V but switchgear, combiners and fuses are a bit
harder to find (but not impossible).
Not sure of the specifics of the system so it is hard to make detailed
recommendations.
Best Regards,
John Berdner
General Manager, Nort
;
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200, X 747
M: 530.277.4894
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-w
high current bus bar connections but I rarely see
them used on batteries.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200, X 747
M: 530.277.4894
From: re-wre
-insulated ferrules from ferrules
direct.
http://www.ferrulesdirect.com/
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200, X 747
M: 530.277.4894
From: re-wre
Larry:
The Code requires parallel breakers to be designed for this application
(internally ganged).
Just using a handle tie does not allow you to use the poles in parallel.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont
lator as a backup to conventional
charge control.
A simple on off relay to an AC hot water or space heater can dissipate a lot of
power relatively simply and inexpensively.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA
suppliers of directional 2.4 Ghz antennas.
Here is a link to a 24 dB antenna from a local CA retail electronics house.
http://www.frys.com/product/7411495;jsessionid=5vsRnGBpd1iiZqjr7HmfLg__.node2?site=sr:SEARCH:MAIN_RSLT_PG
Best Regards,
John Berdner
General Manager, North America
SolarEdge
Light soaking = exposed to sunlight for some period of time in order to
complete light induced degradation (or apparently light induced enhancement).
Best Regards,
John Berdner
General Manager, North America
[cid:image001.jpg@01CE0E09.55EDDEB0]
SolarEdge Technologies, Inc.
3347 Gateway
otor starting) this will not be
an issue.
48 kVA seems like one heck of a surge but, then again, I have not seen the
customer's home :)
Best Regards,
John Berdner
General Manager, North America
[cid:image001.jpg@01CE09F2.47122470]
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fr
,
John Berdner
General Manager, North America
[cid:image001.jpg@01CE0302.850C5940]
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200, X 747
M: 530.277.4894
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches
typically while charging not when inverting and I set the
current limit so that I do not exceed ampacity of 2/0.
In my experience it takes >= 14kW generator to drive a pair of SI's to full
power while charging
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technolo
SMA Sunny Island also does this but also discharges battery in parallel with
the generator to create a "virtual generator" that is larger than the actual
generator.
Just set the max generator current and it does the rest.
Best Regards,
John Berdner
General Manager, North America
[ci
tance between the
supply and the inverter to get it to track right.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200, X 747
M: 530.277.4894
-Original Me
.
Best Regards,
John Berdner
General Manager, North America
[cid:image001.jpg@01CDFD3C.B73855C0]
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200, X 747
M: 530.277.4894
From: re-wrenches-boun...@lists.re-wrenches.org
[mai
winter day.
@ Marco: does your weather data source have a database of insolation and
temperature over the year ?
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.320
(also required by NEC).
Best Regards,
John Berdner
General Manager, North America
[cid:image001.jpg@01CDFAC6.C81684C0]
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200, X 747
M: 530.277.4894
From: re-wrenches
Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200, X 747
M: 530.277.4894
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches
free to contact me if you have any questions.
Best Regards,
John Berdner
General Manager, North America
[cid:image001.jpg@01CDFA39.F671DEB0]
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3200, X 747
M: 530.277.4894
From
to
make sure the terminal at the other end also meets NEC requirement at the
conditions specified by the manufacturer of that equipment.
Best Regards,
John Berdner
General Manager, North America
[cid:image001.jpg@01CDFA3C.9E6DCC30]
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont
) copper to aluminum.
Best Regards,
John Berdner
General Manager, North America
[cid:image001.jpg@01CDF488.819E0980]
Solaredge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3201 ext 747
M: 530.277.4894
From: re-wrenches-boun...@lists.re
st Regards,
John Berdner
General Manager, North America
[cid:image001.jpg@01CDF3D0.4AE4FB00]
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3201 ext 747
M: 530.277.4894
From: re-wrenches-boun...@lists.re-wrenches.org
agree.
No matter... the industry moving to ungrounded systems which eliminate the need
in another way.
This is but one of many reasons I like ungrounded arrays.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA
main criteria is if array conductors are, or are not, bonded to ground by the
inverter (which is not necessarily related to a specific topology).
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of ou
then
the inverter requires a GEC with all the related requirements - no if and's or
but's.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3201 ext
module in the field does not make
it a Listed ac module.
Best Regards,
John Berdner
General Manager, North America
SolarEdge Technologies, Inc.
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3201 ext 747
M: 530.277.4894
-Original Message
mer feeding the service >> might<< be helpful in
overcoming this objection (assuming the transformer is big enough to support
your onsite generation).
Best Regards,
John Berdner
General Manager, North America
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of
typically based on the size of the isolation relay
and is usually higher than the inverter's continuous power rating.
Best Regards,
John Berdner
General Manager, North America
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3201 ext 747
flat screen
TV (LED) to turn off.
We added a soft start circuit and solved the issue.
Best Regards,
John Berdner
General Manager, North America
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3201 ext 747
M: 530.277.4894
-Original Message-
Fro
Amps.
Best Regards,
John Berdner
General Manager, North America
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3201 ext 747
M: 530.277.4894
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lis
l/07246OTSS.pdf or similar.
Best Regards,
John Berdner
General Manager, North America
[cid:image001.jpg@01CDE0F4.EF92CDB0]
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please note of our new address.)
T: 510.498.3201 ext 747
M: 530.277.4894
From: re-wrenches-boun...@lists.re-wrenches.org
[mai
ence folks that have grid backup systems do not have the same energy
awareness as those that live off grid and so they use more power.
Best Regards,
John Berdner
General Manager, North America
[cid:image001.jpg@01CDDDC4.BBCAA1C0]
3347 Gateway Boulevard, Fremont CA 94538 USA (*Please no
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