In the immediate term I’d reckon the best option is to put in conduit that can
also hold the neutral, unless you get a reply from Fronius.
I’d also be pretty tempted to follow the clear instructions in their manual as
well, but definitely curious to see what you hear back from the mfg.
If the
Not sure about #2 or #3, but 100% yes on #1, which quite a few people (including the mfg?) “learned the hard way.”BrianOn Oct 31, 2024, at 6:57 AM, Dave Tedeyan via RE-wrenches wrote:Hi All, I am about to use the AP systems rapid shutdown units for the first time (pairing with SMA inverters). I w
All paid up, love this list, thanks Michael!
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
http://www.solarenergy.org
On Fri, Sep 27, 2024 at 1:11 PM rick--- via RE-wrenches <
Based on what I heard at RE+, they are no longer in operation. This may be
rumor, but based on the folks I heard it from I believe it.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
an
green, white, gray, or red.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
http://www.solarenergy.org
On Wed, Jun 5, 2024 at 2:08 PM William Miller via RE-wrenches <
re
IFC in the
case of the IRC, and pointing to Chapters 4-9 in the case of 855), in other
words basically follow the (more onerous) rules for ESS on other than one-
and two-family dwellings.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 M
Are they the Amohenol UTX connectors? SW had a recall on them, sounds like about the right timeframe. BREAKING: SolarWorld recalls PV modules with Amphenol connectorspv-magazine-usa.comBrianOn Nov 9, 2023, at 4:47 PM, Ray Walters via RE-wrenches wrote:
12 Ga wire is not going t
For real I was about to ask the same question for a friend that got a quote
with Sulfab mods…any feedback greatly appreciated!
Brian
> On Aug 21, 2023, at 8:22 PM, Howie Michaelson via RE-wrenches
> wrote:
>
>
> Hi All,
> I have heard mixed comments about Silfab modules. If anyone has expe
I had the same experience as the older post you referenced with these mods on 2 MW system. Lots of burn marks and shattered glass, located at the edges of cells. And under thermal imaging there were clearly lots of issues, including ones that hadn’t (yet) manifested themselves to the naked eye. The
in cable impedance; it is
non-destructive, but also not as accurate in terms of the location
(providing a cable length to the fault, rather than a "thump" at the actual
fault location) and typically cannot see higher resistance (≈>200 MΩ)
faults that the thumper can.
Brian Mehalic
NABCEP Ce
They do make a "single cell module" version that is upright, in a steel
case, with the terminals on top; its top is a different color and
dimensions than the front of the rack-mounted ones in their literature.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-5
disconnect requirement (B) doesn't specify a
voltage above which it applies, and the voltage specification in (A)
doesn't apply to (B).
Cheers,
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar En
roducts
not yet available at the time the Code is adopted...); PDBs already exist,
so no dice there, and it is likely that since they exist, an argument using
90.4(D) in regards to pressure connectors/splices will fall on deaf ears
because, well, use PDBs."*
Ugh.
Brian Mehalic
NABCE
ubmitting any PIs
on your own.
Maybe in the meantime, a control system that shuts off the PV, and then the
batteries, would be worth designing.
Brian Mehalic
On Wed, Feb 1, 2023 at 2:10 PM James Jefferson Jarvis via RE-wrenches <
re-wrenches@lists.re-wrenches.org> wrote:
>
>
>
adero, CA 93422
805-438-5600
www.millersolar.com
CA
Lic. 773985
From:
James Jarvis [mailto:j...@aprsworld.com]
Sent: Saturday, January 28, 2023 7:03 PM
To: Brian Mehalic
C
onnected. If you are unwilling to test it at full load, I'd guess you know that the whole concept is a dumb idea.-James Jefferson JarvisAPRS World, LLC+1-507-454-2727http://www.aprsworld.com/On Sat, Jan 28, 2023 at 7:35 PM Brian Mehalic <br...@solarenergy.org> wrote:Every single hous
Every single house I’ve looked at in my town has a breaker panel with a main service disconnect on the outside of the house already. So in many cases we are well beyond worrying about someone “flicking your switch!”In fact, in addition to the emergency disconnect requirement for stationary standby
I would hope that the UL certification documentation for the products
should suffice.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
http://www.solarenergy.org
SEI Professional
For what it is worth, I don't recall seeing a Magnum/Sensata booth at the
show formerly known as SPI last week.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
e, and there must be means to prevent birds/rodents from
entering/blocking the pipe.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
http://www.solarenergy.org
SEI Profes
I like Sunbundlers too, but you have to be careful - I’ve seen them pulled too
tight to the point where the crimp is digging into conductor insulation,
especially when the weight of the wire is on the crimp.
Brian
> On Mar 14, 2022, at 10:43 AM, August Goers wrote:
>
>
> I'm partial to Hey
Only some general specifics that they’ve announced: “LG plans to focus on
storage systems and energy management in the future, as well as other
yet-to-be-announced advancements.” And that they’ll “continue to service
owners of LG modules for a period of time.”
Brian
> On Feb 23, 2022, at 10:5
, where often one uses the SqD
> HU361, which can be wired in various ways to meet the 600V requirement. It
> can be wired one pole for up to 18A Isc for PV, or up to 30A if two poles in
> series, or one pos and one neg pole in the circuit. The Schneider RS Disco
> does break both p
A if two poles in
> series, or one pos and one neg pole in the circuit. The Schneider RS Disco
> does break both poles, one of the few devices that make it clear. I'm curious
> what others are doing.
>
> Brad
>
>> On Tue, Feb 1, 2022 at 11:23 AM Brian Mehalic wro
Sorry, forgot to state my previous comment was in regards to a ground-mount.
Brian
> On Feb 1, 2022, at 12:19 PM, William Miller wrote:
>
>
> Ray:
>
> Thanks for that input. I was hoping I was wrong. I looked for that
> discussion in the archives but could not find it.
>
> William
>
A switch, outside of the building, opening the PV circuit to the power
electronics, and functioning as the pv system disco and the rapid shutdown
initiation device, should be all that is required.
Brian
> On Feb 1, 2022, at 11:43 AM, Christopher Warfel
> wrote:
>
>
> That was my understan
new Code cycle -
without a Public Input to address, the code-making panel cannot "touch" a
section of the code. And of course there are plenty of PIs from individuals
and other organizations that are addressed by the panel.
Cheers,
Brian Mehalic
NABCEP Certified Solar PV Installation
Movement? Maybe, but as far as I can tell it’s just a forum to complain as I
see no activity that could actually impact the NEC® via the clearly defined and
delineated process. Also there are a few flat-out false claims on the site,
along with a call to action to fix module level shutdown by…hav
If the inside of a 3R enclosure isn't considered dry enough for a buchanan
crimp/cap, then there's millions of 3R panels with breakers and busbars in
them that would have the same problem.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical
Simpliphi has at least two combinations of specific batteries + SolArk that it
says are 9540 listed as a combination. See spec sheets/fully integrated systems
on their site You may have to dig further to find the actual certificates or
whatever the AHJ is asking for. Or maybe these aren’t the c
Dehn. Good info on their site.
https://www.dehn-usa.com/en-us/dehn-spd-configurator
Brian
> On Jun 24, 2021, at 5:41 PM, Kirk Herander, VSE wrote:
>
>
> Hello,
> Can anyone recommend a 1000 v arrestor for a 850 v array? Had a storm event
> this week which requires research. Thanks.
>
> Ki
Dehn has options as well as lots of good resources.
https://www.dehn-usa.com/en-us/dehn-spd-configurator
Brian
> On Jun 24, 2021, at 5:41 PM, Kirk Herander, VSE wrote:
>
>
> Hello,
> Can anyone recommend a 1000 v arrestor for a 850 v array? Had a storm event
> this week which requires rese
How much opportunity is there really for fuel savings in a residential,
back-up power application anyway?
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
http://www.solarenergy.org
SEI
I believe the 30-200 A versions of Eaton/C-H’s line of heavy duty DPDT safety
switches are 600 VDC.
Brian
> On May 9, 2021, at 7:06 AM, Kirk Herander, VSE wrote:
>
>
> Yep, I've used them before as high voltage array discos. But no double-throw
> models exist unfortunately. The IMO assembl
Yikes. Didn’t realize that about the ConnectDER. Repeated tripping due to a
fault can certainly damage internal parts and contacts, leading to resistance
and operation and lower than the rated current.
Brian
> On May 9, 2021, at 7:06 AM, Kirk Herander, VSE wrote:
>
>
> The breaker is actua
Thanks Corey, it'd had been a while since I checked, glad to see it back
online.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Ser
300.18
Brian
> On Mar 4, 2021, at 1:11 PM, Drake
> wrote:
>
> Hello Wrenches,
>
> I believe it is a code requirement to install conduits in their entirety
> before pulling wire through, and that this applies to all types of rigid
> conduit.
>
> Is this correct? Does anyone know where i
Has anyone diagnosed truly failed diodes? Or pinpointed other failures in the
junction box or cell groups that could open circuit them?
I’d really like to see some thermal images!
Brian
> On Nov 9, 2020, at 5:58 PM, Steven Lawrence wrote:
>
>
> Hi Adam,
>
> I have a 3.3MW site using Hanwh
4374 (calibrated recently)
>
> Testing a single module, while ideal, is not practical unless we run into
> issues. I should have the ~480 strings worth of measured data back later
> today.
>
>
>> On Nov 3, 2020, at 2:52 PM, Brian Mehalic wrote:
>>
>> Hey Ja
resting to have a test on a single mod (well
some number of single mods).
What meter are you using, and has it been calibrated recently?
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy Internat
; I have an old Sanyo Bi Array and it pretty much has never gone outside the
>> cold weather Voc that is logged by the controller. The 600v mppt just
>> cranks out the power when the snow is off the array. It does pretty well
>> also when the snow is on it.
>>
>> Just curious wh
I second Jay's request for some numbers, I'm curious about this not having
participated directly in any bifacial projects yet. The difference in Voc
and Vmp ratios is interesting.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CM
ce at the load side of the power source connection
point shall be rated not greater than the ampacity of the feeder.
As with the feed-thru conductors, the idea is make them big enough or
re-establish overcurrent protection, and protect busbars accordingly.
Brian Mehalic
NABCEP Certified Sol
re-establish
overcurrent protection for that portion of the feeder subject to multiple
power sources.
In your drawing the 200 A feeder conductors, as well as the busbar below
the PV system breaker, could be subject to > 200 A in the event of a fault
somewhere along those conductors.
Brian Mehal
There's very "territorial" language in the 2020 NEC 705.11(D):
"For meter socket enclosures or other equipment under the exclusive control
of the electric utility, only connections approved by the electric utility
shall be permitted."
Brian Mehalic
NABCEP Certif
ided
with dc ground-fault protection meeting the requirements of 690.41(B)(1)
and (B)(2) to reduce fire hazards. Solidly grounded PV source circuits
with not more than two modules in parallel and not on or in buildings shall
be permitted without ground-fault protection."
Brian Mehalic
NABCEP C
Fronius Galvo can be positively grounded. But the instructions literally say to
take the factory-installed fuse (neg to ground) and install it between positive
and ground “outside the inverter.”
Brian
> On Oct 14, 2020, at 4:10 PM, Ray wrote:
>
>
> The Midnite Solar Classic Controller used
I believe that the last time I looked into it it had to have internet
connectivity, which wasn’t going to happen.
Brian
> On Sep 29, 2020, at 5:00 PM, August Goers wrote:
>
>
> Hi Chad -
>
> I have no experience installing this product, but bumped into it a few years
> ago when someone r
quot;work with you" based on the language in them. (For
example, a 2023 proposal is to exempt buildings that don't have habitable
rooms, which is defined in the 2020 NEC®; other building types as defined
in the IBC may provide the basis for exempting a current carport
application, but YMM
Very nice.
One thing I’d mention is that sufficient durability doesn’t mean it has to last
for the lifetime of the system. It’s an item on O&M inspection checklists -
“all labels/placards/directories are intact and legible” (with the presumption
it’ll last until the next O&M inspection.
Of co
Change in 2017 to “functional grounded” was to clarify this - it’s not solid
when it is thru a fuse or breaker than can be interrupted either in the event
of a ground-fault or if the breaker is intentionally opened. 2017 makes it
clear that there are very few solidly grounded systems (2 or less
and the
AHJ to verify this.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
http://www.seisolarpros.com
On Thu, May 7, 2020 at 6:43
Deadline for 2023 NEC® public input is in September.
Brian
> On Apr 30, 2020, at 7:12 AM, Ray wrote:
>
>
> Hi Jerry;
>
> This isn't about us not being willing to learn the tech. All of us are
> constantly learning about new code changes, new inverters, and solar modules
> that change spe
Sorry you had already answered the first two questions :) What about the others?
Brian
> On Apr 28, 2020, at 6:50 AM, Dave Tedeyan wrote:
>
>
> Hi All,
>
> I've got an outback system (Radian 8048A, 2 FM80, 16 Trojan L16RE-B) where
> when the customer equalizes, the batteries hover right ar
What’s the capacity of the battery bank? And the size of the charging sources?
What’s your EQ voltage? Have you tried a lower EQ voltage setting to see if it
does the same thing?
Brian
> On Apr 28, 2020, at 6:50 AM, Dave Tedeyan wrote:
>
>
> Hi All,
>
> I've got an outback system (Radian
I’ve seen a system with a similar issue, visible with the naked eye looking
across the fielded mods on a fairly large ground mount (and approx. 5-7 mm of
“sag” across the short dimension of the mod). I cannot yet say that this is the
cause, but we are seeing numerous module failures with arcing
my parts list, I have a delay time that would hold the GT inverters
> off-line for some period of time (I would probably set to 1 hour) before
> coming back on line after tipping off.
>
>
> Mark
>
>> On 11/3/2019 9:53 AM, Brian Mehalic wrote:
>> With frequen
a delay time that would hold the GT inverters
> off-line for some period of time (I would probably set to 1 hour) before
> coming back on line after tipping off.
>
>
> Mark
>
>> On 11/3/2019 9:53 AM, Brian Mehalic wrote:
>> With frequency-on/off, frequency power con
With frequency-on/off, frequency power control, or other “inverter integrated”
control based on battery voltage/state of charge there is also control in
regards to when the ac coupled inverters come back on. And yes, this is
definitely needed to prevent overcharge (or get three-stage charging fr
You say you've seen many of these tests in the past; do you specifically
mean the intermatability test?
Thanks for the info! (And you also really helped me out identifying some
connectors on a problem-job a couple months back...thanks again!).
Brian Mehalic
NABCEP Certified Solar PV Install
s connectors are interchangeable, this being said l have
> had arc issues as a result. FYI there are knock-offs out there to.
> Jerry
>
>> On Wed, Sep 4, 2019, 1:42 PM Brian Mehalic wrote:
>> Are you saying each module has, for example, a positive factory H4 lead and
>>
Are you saying each module has, for example, a positive factory H4 lead and
a negative factory MC4 lead?
I definitely know of H4 problems, both mated with H4s and mismatched.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520
I agree Blake - you have to check the specs and consult the mfg. The same is
true with combiners, some are rated for continuous duty/full load, and some are
not. Lots of large systems out there with 200A combiners connected to 250A
OCPDs (and 250A conductors, but that’s another story...).
Bria
https://en.wikipedia.org/wiki/Dark_web
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
http://www.seisolarpros.com
On Tue, Jul
You’re losing about a third of your voltage so one cell bank is out of the
circuit. Either a shorted closed diode (more likely IMHO) or fully open
connections somewhere in a cell bank (probably visible if between cells, if in
the jbox, well it depends on the jbox).
If you short circuit the mod
erent
cables multiple times, while never mentioning that they can be used
interchangeably. BTW, I'm really just passing this info on from Ed E!
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy Int
Is this in regards to 2014 NEC 705.12(D)(6)? This requirement was deleted
in 2017.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electrical Code® CMP-4 Member
(520) 204-6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
lly looking for an
outlier, assuming it isn't a hard fault that could've been found with a DMM
or a visual inspection.
Always a good idea to check with the module manufacturer to see if they
have documentation on their recommended procedure.
Cheers,
Brian Mehalic
NABCEP Certified Solar P
tteries and ESS are very common) was inserted in
order to exempt other devices that store energy (such as UPS, or battery
backup in fire alarms/exit signage/etc.) from the 706 requirements.
Cheers,
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
National Electri
Battle Born seems somewhat similar (internal BMS) - who knows how many
different labels get slapped on batteries coming out of the same factory.
Their manual does say you can do series connections up to 48 Vdc.
Brian
> On Mar 4, 2019, at 8:50 AM, Roberto Kruse wrote:
>
> Hi Kienan.
>
> I a
Seaward changed/updated their algorithm/programming-not sure when but it hasn’t
been too long ago. May be worth contacting them again to see if your unit could
benefit from the upgrade (I think you have to send it in).
Brian
> On Sep 24, 2018, at 12:18 PM, Dave Tedeyan wrote:
>
> Does anyone
Currently up in the air as to whether 2020 will allow that on 1- and 2- family
houses. If so then yes...currently don’t know of any.
Brian
> On Sep 18, 2018, at 2:45 PM, Jay wrote:
>
> Does anyone make a 1000vdc single phase inverter?
> Would reduce wire costs dramatically
>
> Jay
> Peltz p
My experience has been much like Blake's, with the difference being they
were all in the Northeast, both roof and ground mounts, all 480 V. That
was a couple of years back, and I know some smart folks have been working
on this product in the meantime.
Brian Mehalic
NABCEP Certified Sol
That looks like DPW / Preformed Line Products Power Rail.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
520.204.6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
http://www.seisolarpros.com
On Thu, Apr 19, 2018 at 12:52 PM
Mark-
The 2018 IFC and IRC both state "Pathways shall be located in areas with
minimal obstructions, such as vent pipes, conduit or mechanical
equipment."
It must be permanently marked "WARNING PHOTOVOLTAIC POWER SOURCE" in
accordance with 690.31(G)(3) as well.
Brian Meha
onductors to make it more safe to enter a building.
Cheers,
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
520.204.6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
http://www.seisolarpros.com
On Mon, Apr 16, 2018 at 1
Yes! And the IFC and IRC both allow local fire officials to basically
require, or allow, whatever they want (Exception 2 to IFC 1204.2 and IRC
R324.6).
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
520.204.6639
Solar Energy International
http
doesn't always do it exactly the way
you do :)
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
520.204.6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
http://www.seisolarpros.com
On Wed, Apr 4, 2018 at 9:15 AM, Dave Angelini Of
There are access/pathway requirements for both residential and commercial roofs
(of course they are different, and the residential requirements only apply to
2:12 pitches or greater) in the IFC and IRC, and they’ve been in there since
2012. The 2018 edition of the IRC is more favorable in terms
Access pathways and clearances are in the International Fire Code and
International Residential Code (and maybe other I-Codes as well).
Brian
> On Apr 3, 2018, at 1:03 PM,
> wrote:
>
> Hey folks:
>
> What section of the Code relates to the 3' clearance for a solar array? …as
> in, the r
Did you test the voltage of the individual cell banks in the module with
the diodes out?
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
520.204.6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
http://www.seisolarpros.com
On
ted closed would be the failure mode that would indicate an
always-closed diode providing a permanent bypass path and thus a drop of
25% of voltage per bad diode (or set of paralleled diodes). (These have 4
diodes right?).
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™
ackfeeding a 30 A
breaker. Hm
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
520.204.6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
http://www.seisolarpros.com
___
List spon
r
testing (and check the accessible diodes).
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
520.204.6639
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
http://www.seisolarpros.com
On Thu, Aug 25, 2016 at 8:24 AM, Steve Bell
w
there has been some voltage
degradation of the older mods).
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
Solar Energy International
http://www.solarenergy.org
SEI Professional Services
http://www.seisolarpros.com
On Tue, Jun 21, 2016 at 1:47 PM, Ash Bowersock
Dehn and Citel make them.
Brian
> On Jun 17, 2016, at 11:11 AM, John Stimac
> wrote:
>
> Can anyone recommend a 1000VDC surge arrestor? Cooper Bussmann has them for
> >$1000. Delta has them for $39. Thanks!
> --
> John Stimac | Corvallis, OR
> Renewable Energy Associates, LLC
> 541-754-200
But can you get proper torque with a compressible plastic washer in there?
Probably Waytek has them.
Brian
> On Jan 27, 2016, at 6:37 AM, Jay wrote:
>
> Hi all
>
> I've got a client who insists on "plastic " ( synthetic) washers between SS
> washers and the aluminum racking and modules.
>
Steve, I didn't see if you answered Jay regarding operating the inverter on
just a single string at a time. I'd definitely try that before curve
tracing.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
PV Curriculum Developer and Instructor
So
May just be an accounting trick on the backend? Software lops off all
exported energy when export power is above 8kW?
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
PV Curriculum Developer and Instructor
Solar Energy International
http://www.solarenergy.org
On
I disagree about tarps. We've tested fully covered arrays (and small ones at
that) and still had what would be considered lethal levels of current and
voltage, even when using heavy, reflective tarps. And it can be very difficult
to ensure they stay in place, plus it's impractical for larger arr
Kyocera still makes a similar 36 cell module:
http://www.kyocerasolar.com/assets/001/5656.pdf
Brian
> On Sep 2, 2015, at 8:22 PM, frenergy wrote:
>
> Help needed in finding 4, Kyocera (or close) 120's (130's?). I have a
> customer looking to add a string of 4 to his existing 2 strings of 4
70% of the rated ampacity, but as stated in Table
301.15(B)(17) (conductors in free air, so that helps).
Any guidance would be much appreciated, and thanks for your time,
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
PV Curriculum Developer and Instructor
So
filling in all those gaps between rows could make servicing
the array a bit problematic!
Cheers,
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
PV Curriculum Developer and Instructor
Solar Energy International
http://www.solarenergy.org
On Tue, Jul 28, 2015 at 10:24
boun...@lists.re-wrenches.org] On
> Behalf Of Brian Mehalic
> Sent: Wednesday, July 08, 2015 6:06 PM
> To: RE-wrenches
> Subject: Re: [RE-wrenches] SMA Sunny Island Sizing
>
> Last year SMA didn't have a booth at Intersolar, just the company can
> illegally parked outside
Last year SMA didn't have a booth at Intersolar, just the company can illegally
parked outside. Not sure about this year but I do know Greg Smith just left.
Brian
> On Jul 8, 2015, at 8:13 PM, Jay wrote:
>
> Out of curiosity what is the design question?
>
> And I'd heard rumors that SMA
e; worst case is internal
arcing at some point during their life. I have to imagine this is outside
of the mfg's spec/tolerances, though I question how they got through
quality control, and I wouldn't want to put them on my roof for the next
several decades. Drunk/tired robots I suppose.
An incognito window in Chrome worked for me; had no problems in Firefox,
which I had never used for PVWatts before; no matter what I did in Safari I
could not get it to work.
I'm assuming it totally rocks in IE?!? :)
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R0315
DEHN has some great resources for various types of PV systems, and a chapter on
it in their free lightning protection guide. Haven't looked in a while but
seemed like great info.
Brian
> On Jun 4, 2015, at 1:03 PM, Garrison Riegel
> wrote:
>
> Wrenches,
>
> Does anyone have any best pract
Same deal, multiple computers and browsers, no luck, and no reply to an email
about it either.
Brian
> On Jun 3, 2015, at 11:02 PM, Gary Willett
> wrote:
>
> You're not alone. I tried several times today and it's not working for me
> either. I sent a Tweet on #PVWATTS but no response there
protection are required on both ungrounded circuit conductors. Now whether
or not that'll always be the case in the future is a different story.
Brian Mehalic
NABCEP Certified Solar PV Installation Professional™ R031508-59
PV Curriculum Developer and Instructor
Solar Energy International
1 - 100 of 157 matches
Mail list logo
