Gentlefolk,
I have a 35 watt radio transmitter that I need to station in the desert for a
critical application.
Any recommendations for a turnkey provider of a combined solar/wind/battery
system?
Should I build it myself?
Thanks,
Mark Frye
Berkeley Solar Electric Systems
530 401 8024
Do you need the additional switch if you use the Enphase battery?
From: RE-wrenches On Behalf Of
Jason Szumlanski via RE-wrenches
Sent: Tuesday, July 12, 2022 11:38 AM
To: RE-wrenches
Cc: Jason Szumlanski
Subject: [RE-wrenches] Enphase IQ7 versus IQ8
I am trying to figure out why it is a
?
Or at some point, as ambient temperature drops, the pack will freeze and
be damaged anyway?
Thanks,
Mark Frye
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I do remember Fat Spaniel. I remember the day they came to our office to
show us their product. It was an enclosure full of power strips, wall
warts and wires going everywhere.
Origins.
On 4/10/2021 2:52 PM, Jerry Shafer wrote:
Wrenches
I have used many of the monitoring platforms, many of
I wore cougar paws for many years. I still had to protect brand new
asphalt shingle roofs if they were at all warm.
On 3/9/2021 12:47 PM, August Goers wrote:
Corey and Others Who Have Used Cougar Paws:
Have you found that these special shoes will protect the roof when it
is hot out? It seems
My Rolls manual says:
"It is recommended to water the battery cells half way through the
equalization. This is to
assure the water is completely mixed into the electrolyte."
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Perhaps we should be applying Article 500 to the installation of
batteries as well.
On 10/22/2020 10:02 AM, Kent Osterberg wrote:
Jay,
I suspect it is because FMC is not vapor tight and could be an
unintentional path for hydrogen gas, or could allow acid vapors to
condense on the enclosed
The most important thing here is that no one is standing up to sing the
praises of either SMA or Outback.
I myself have sent about 2 hours on hold over 2 days trying to get an
issue addressed by SMA.
Re: Sol-Arc I would pay a lot extra or take some not so good aspect in
exchange for good
I looked at this and decided on a new set of Rolls flooded lead calcium
for my grid-tied backup system.
On 8/9/2020 1:10 PM, Ken Schaal wrote:
Any thoughts on Kilovault that Morningstar is teaming up with?
Time for me to replace my 10 yr old. Deka AGMs.
Not many outages, mostly float. No TOU
Did SMA give anymore explanation as to why this set up does not work?
On 7/10/2020 10:50 AM, scot.a...@solarcentex.com wrote:
We have a design with Sunny Storage 6.0 inverter, SB 6.0 PV inverter,
the SMA Automatic Backup Unit, and three LG Resu batteries. Works like
a charm during normal
Built in auto transformer.
On 6/15/2020 8:15 PM, Jim Duncan wrote:
Anyone looking at these, yet? 32 Circuit Breaker Panel with (if looks
like) individual (relay?) control on each circuit and CT Monitoring? I
suppose Arc Fault Trip and GFI are built in?
On Jun 13, 2020, at 7:05 AM, Mark Frye wrote:
On.
On 6/12/2020 7:27 PM, Jay wrote:
Hi Mark
Is this off grid or on?
Jay
On Jun 12, 2020, at 7:09 PM, Mark Frye wrote:
I see.
What you say about the frequency shift being slow makes me again
doubt the value of even using it in my
On.
On 6/12/2020 7:27 PM, Jay wrote:
Hi Mark
Is this off grid or on?
Jay
On Jun 12, 2020, at 7:09 PM, Mark Frye wrote:
I see.
What you say about the frequency shift being slow makes me again
doubt the value of even using it in my application.
I have a controller that can regulate
coupled array feeding the system.
Brad
On Fri, Jun 12, 2020 at 4:34 PM Mark Frye <mailto:ma...@berkeleysolar.com>> wrote:
Yes an elite group within an elite group.
So the SB240 does not have frequency shift /wattage control. How
are you implementing charge control in stand a
+5548. They are very solid performers.
Brad
AEE Solar
On Fri, Jun 12, 2020 at 3:39 PM Mark Frye <mailto:ma...@berkeleysolar.com>> wrote:
Hello,
I have a small array of 8 - SMA SB240 microinverters on the roof.
Peak
power out of the array has never exceeded 1800 W.
Hello,
I have a small array of 8 - SMA SB240 microinverters on the roof. Peak
power out of the array has never exceeded 1800 W.
I am adding a Magnum MS-PAE 4448 with a 315 AH flooded Lead Calcium
battery bank.
Cheers
On 6/12/2020 12:31 PM, Chris Schaefer wrote:
G'Day Mark,
Which grid
, at 6:59 AM, Mark Frye wrote:
Looking for confirmation from Wrenches who know Magnum inverters:
- MS-PAE
-ME-RC
- Frequency shift enabled (battery type "Custom")
- AC coupled PV inverters w/o frequency shift capability
Function:
At Absorb voltage frequency shift is zero, at Absorb v
Looking for confirmation from Wrenches who know Magnum inverters:
- MS-PAE
-ME-RC
- Frequency shift enabled (battery type "Custom")
- AC coupled PV inverters w/o frequency shift capability
Function:
At Absorb voltage frequency shift is zero, at Absorb voltage + 6 V,
shift is 0.5 Hz (in
Folks,
A few questions:
When charging a FLA battery, even though we use a three stage charging
regime controlling voltage/current, is it not true that the real goal is
to avoid excess temperature rise inside the cell generally? Do we worry
that excess current will cause localized excess
discussion. Let me know if you need more detailed help as we have many
years experience with Li-ion battery systems.
Larry Crutcher
Starlight Solar Power Systems
From: Mark Frye mailto:ma...@berkeleysolar.com>>
Subject: [RE-wrenches] How much Li battery?
In the way back machine I remember
Remote Solar
303 505-8760
On 5/23/20 5:48 PM, Mick Abraham wrote:
Greetings, All~ Mark Frye had asked:
"...with a 4000w Outback Radian, AC
coupled with 2000w of
9 813 0060
On Mon, 25 May 2020 14:08:03 -0700, Mark Frye
wrote:
Folks,
Back again into the way back machine, I once installed a system with
multiply FX's stacked in a split-phase configuration. At the advice of
the engineer, I also installed an auto-transformer across the lines to
help balan
Folks,
Back again into the way back machine, I once installed a system with
multiply FX's stacked in a split-phase configuration. At the advice of
the engineer, I also installed an auto-transformer across the lines to
help balance the per-phase loads.
With the current split-phase inverters
customer only uses
this for some low demand power consumption that must operate. It is
less expensive to go with 16 kWhrs vs 8 at a cost per watt also
Jerry
On Sat, May 23, 2020 at 10:37 AM Mark Frye <mailto:ma...@berkeleysolar.com>> wrote:
In the way back machine I remem
In the way back machine I remember being at a product roll out meeting
for the brand new Outback FX inverter. I asked the engineer, what was
the smallest battery bank that could be connected to the inverter. He
said on the fly that probably you would want the battery to "weight" at
least as
five minutes.
Voila, I can run house loads from 0 to 2kw with my existing GT PV with
the balance of energy dumped as needed to the immersion heater.
Right?
Mark Frye
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I spoke with the vendor who sent me the email and she confirmed that the
modules are not warranted by Panasonic, but rather by Tesla with
slightly different terms, so all is well, buyer beware.
On 1/10/2020 6:46 AM, Mark Frye wrote:
I received a sales email for some of these recently
I received a sales email for some of these recently.
https://www.pv-tech.org/news/panasonic-warns-us-solar-installers-of-tesla-designated-panels-on-the-marke
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Most every industrial grade tracker run off of location and time,
calculates the required array angle. The core code for this is open
source out of NREL (your tax dollars at work). Still over my pay grade
to actually integrate this into a home made tracker.
On 12/2/2019 6:28 AM, Mac Lewis
into the output.
Brad
On Sun, Nov 3, 2019 at 6:10 PM Mark Frye <mailto:ma...@berkeleysolar.com>> wrote:
OK Jay that makes sense.
This must mean that there is a significant difference in the
function of
the BB inverter when it is in off-grid mode vs when it is in grid
.
They have no communication with a Rule 21 GT inverter.
The BB, it will just keep charging and charging with any extra energy coming
from the GT inverter. The BB has no regulation, there is no absorb or float,
just charge.
jay
peltz power
On Nov 3, 2019, at 4:31 PM, Mark Frye wrote:
OK, I am
't see that there is a catastrophic
result here, the BB raises the frequency and trips the GT. So what, as
long as the BB returns to a standby.
On 11/3/2019 4:31 PM, Mark Frye wrote:
> OK, I am hearing this over and over and I just want to confirm that is
> true even if the BB is older and does n
Happy Hour, yes it is that time here in our home.
Thanks again, but I guess I don't see that there is a catastrophic
result here, the BB raises the frequency and trips the GT. So what, as
long as the BB returns to a standby.
On 11/3/2019 4:31 PM, Mark Frye wrote:
OK, I am hearing this over
et
text 209 813 0060
On Sun, 3 Nov 2019 16:17:39 -0800, Mark Frye
wrote:
Folks,
Please allow me to ask another question:
Suppose I have a bi-direction inverter/charge with no connection to the
grid.
I have GT inverter ac coupled and producing 2000w. The battery is in
float, and I have 2000w of
Folks,
Please allow me to ask another question:
Suppose I have a bi-direction inverter/charge with no connection to the
grid.
I have GT inverter ac coupled and producing 2000w. The battery is in
float, and I have 2000w of load connected. All is well.
Now suppose I remove the loads without
...@hotmail.com* <mailto:maxfieldso...@hotmail.com>
*
**(801) 631-5584 (Cell)**
*
*From:* RE-wrenches on
behalf of Mark Frye
*Sent:* Sunday, November 3, 2019 11:58 AM
*To:* re-wrenches@lists.re-wrenches.org
*Subject:* R
) 631-5584 (Cell)**
*
*From:* RE-wrenches on
behalf of Mark Frye
*Sent:* Sunday, November 3, 2019 11:00 AM
*To:* re-wrenches@lists.re-wrenches.org
*Subject:* Re: [RE-wrenches] Parts List For AC Couple Disconnect
OK Brian,
So I think you are confirming that monitoring AC side voltage is an
acceptable
your measured value unless your control system has a delay or
other component to control reconnection and charging i think it could
essentially chatter off and on and off and...
Brian
On Nov 3, 2019, at 9:38 AM, Mark Frye wrote:
Hi William,
Thanks, you bring up issues that are important to me
Hi William,
Thanks, you bring up issues that are important to me here.
In particular, my situation is that the GT inverter is inter-tied a
couple sub panels upstream of where I want to put the BB inverter. The
distance is long, so I am looking for a solution where I don't have to
run a cable
a job for an Arduino...
-Glenn
Sent from my 'smart'phone, so please excuse typos and spelling errors.
-- Original message--
*From: *Mark Frye
*Date: *Sat, Nov 2, 2019 1:05 PM
*To: *re-wrenches@lists.re-wrenches.org
<mailto:re-wrenches@lists.re-wrenches.org>;
*Cc: *
*Subject:*[RE-wr
Folks,
I guess what I am asking is does anyone know of a cheaper way of
implementing than:
Digikey, Relay Monitor Voltage, 646-1145-ND, $117 each, Qty. 1
Digikey, On-Delay Timer, RTE-P1AF20, $49 each, Qty. 1
Digikey, Relay Socket, 27E891, $7 each, Qty. 2
Total = ~ $200
Thanks,
Mark Frye
voltage and latch a coil on when it raises
above a set point (250VAC). I then want a timer to release the latch
after about 1 hour.
Sound about right? Are any vendors selling such a device? How about a
parts list from Digikey?
Thanks,
Mark Frye
future?
This is why I ask about the recyclablility / sustainability of Li
batteries? Some what agnostic here but wondering what the thinking
around this is?
Thanks,
Mark Frye
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Speaking of Tesla...
What with Walmart and (Amazon?) suing them for PV fires...
Can anyone here give a brief run down on the whole Amphenol UTX (?)
defective or cross-mated connector story?
Thanks,
Mark Frye
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Folks,
Thread points up the ever present weakness of the Code to deal with PV.
In terms of specifying OCP, the Code completely fails to parse out
overload protection from short circuit protection and always looks at it
from the point of view of the grid. To Blake's credit he did bring in
the
Years ago I used something called a RotoPhase Phase Converter to supply
some 3ph equipment on a site that only had 1ph (2ph?). Not efficient.
On 8/6/2019 6:30 PM, Jay wrote:
Hi all
Is there a way to convert a 120/240v generator to a 120/208 3 phase output?
Thx
Jay
Uh, Looking at what is happening with Tesla's share price, I am not sure
I would want to be "investing" in the products of the neglected solar
division. With Elon alone at the wheel , the Powerwall et. al. might go
the way of the Dodo before too long.
I have been working lately with folks who
Folks,
Has anyone had the chance to work with the Polar Power DC generators
such as https://www.polarpower.com/wp-content/uploads/8220K-972_0115.pdf ?
Anyone aware of good alternatives?
Thanks,
Mark Frye
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Higher altitude equals lower air density equals lower capacity for heat
transfer to atmosphere equals more heat build up inside equipment.
On 8/20/2018 10:18 AM, ch...@oasismontana.com wrote:
Hi Folks:
What is the deal with altitude restrictions on charge controllers and
other solid state
Please let the list know when you get your first request for off-grid
Bitcoin mining. :-)
On 7/24/2018 11:57 AM, Ray wrote:
Oh boy, do I get a bunch of calls for folks wanting to take a 24/7
grow operation off grid. Dana nailed it: Green house. Even with LED
grow lights the numbers are
Could have sworn there was a thread here about melted batteries, but it
not showing in my email client anymore.
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olar Energy International
http://www.solarenergy.org
SEI Professional Services
http://www.seisolarpros.com <http://www.seisolarpros.com>
On Thu, Apr 19, 2018 at 11:02 AM, Mark Frye <ma...@berkeleysolar.com
<mailto:ma...@berkeleysolar.com>> wrote:
Folks,
I have a 3 foot &q
Folks,
I have a 3 foot "walkway" on a roof pitch and between two separate
arrays, as required.
Is there anything that prevents me from running a conduit between the
two arrays, across the "walkway"?
Thanks,
Mark Frye
__
what might need to be "Outside readily accessible". Is
there something other than 690.12 that I need to look at?
Mark
On 4/15/2018 8:26 PM, Darryl Thayer wrote:
I think the code says Outside readily accessible,
On Sun, Apr 15, 2018 at 12:22 PM, Mark Frye <ma...@berkeleysolar.co
disconnect to the exemption from rapid shutdown, right?
Mark Frye
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If you can take multiple 1/4" lags, you can consider the Hollaender
Speed Rail square flange. I have used this to built steel pipe rack,
then attaching solar rail to the pipe with u-bolts.
On 3/3/2018 12:45 PM, Ray wrote:
I can see that the TJI manu doesn't want us blowing 3/8" lags through
Looking at the info on-line, it does seem like you are going to need
significantly more foot print for higher capacity systems.
But had to laugh when I saw the note, "Ideal for Eco-Mansions". Hadn't
heard that one before.
On 1/4/2018 10:35 AM, jay wrote:
While we are talking about
Friends,
I have a pair of size 14 Cougar Paws, boot in very good condition,
insert somewhat worn.
I would be happy to give them to someone that can wear them, for the
price of shipping.
Contact me off-line if you can use them.
Mark Frye
p.s. Hoping this does not violate list rules as I
The strange days of CitizenRe and it's plans to join with Apollo to
deliver solar thru vertical marketing are now well in the past; subsumed
and surpassed by Solar City / Tesla, which will pass into the annals of
history in it's own time..
CitizenRE...they had it right, but but they
I was looking at the SMA web-site and it appears that the solution to
address 2017 module level shutdown is basically to incorporated Tigo
optimizers.
That seems like a big win for Tigo.
Has anyone used the Power+ Solution yet?
Mark
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Jerry I cant seem to find this vendor on the web. Can you send
information on how to find them?
Thanks,
Mark
On 3/17/2017 5:55 PM, Jerry Shafer wrote:
Wrenches
We have been using V2 Li ion batteries, their BMS works well, we are
now testing two systems with an air conditioner, one 5 k and
A follow up on my most recent inspection. I was worried about the AHJ
requiring the extra ground rod just below the array.
I didn't install the ground rod ahead of the the inspection and expected
to argue against it, trying for Exception2.
I got signed off without having to install it.
the "inverter wall" for some particular
reason?
Mark Frye
Berkeley Solar Electric Systems
On 9/27/2016 1:50 PM, Corey Shalanski wrote:
Umm, is PV Wire rated for direct burial? I have seen several
manufacturer spec sheets that suggest this is the case, but I haven't
heard of anyone ever actu
in 3 years and if still operational, how many
person-hours of support and maintenance will have been expended.
Mark Frye
On 6/18/2016 4:48 AM, Chris Mason wrote:
Here's the internals of the one we installed.
https://www.dropbox.com/s/m0ie2tuqe7y1x9d/2016-06-15%2011.01.43.jpg?dl=0
It's a Radian, the
.
What about with the SI? Does it implement it's SOC controls even without
an external shunt?
Thanks,
Mark Frye
Berkeley Solar Electric Systems
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A buddy of mine is rigging his van with PV and is looking for some help.
Can anyone suggest a good website for picking components like wire and
fuses etc.?
Thanks,
Mark Frye
Berkeley Solar Electric Systems
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It does not bode well that Trojan is currently back ordered on at least
some AGM batteries until October in order for them to address issues on
their manufacturing line.
On 8/12/2015 6:44 PM, Ray Walters wrote:
Oh I'm going to risk the wrath of Trojan and others, but I can confirm
issues with
Does anyone have any thoughts/experience with the Aquion Energy battery?
Mark Frye
Berkeley Solar Electric Systems
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if
they had power available from the PV?
How is this handled? It seems to me you would always want to have some
amount of PV DC coupled.
Thanks,
Mark Frye
Berkeley Solar Electric Systems
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confidence on the rafter location by doing many many passes in
order to develop a kind of night sky of markings where the rafter showed
up as the milky way. Haven't used the D-Tect since.
Mark Frye
On 5/10/2015 6:02 AM, Matt Partymiller wrote:
We have tried a number of products. The D-Tect
1. You need to know the actual rating of any sub-section buss that you
will be backfeeding with PV. Do not backfeed this buss with more than
100% of it's ampacity.
2. Evaluate 120% of the 4000A buss against the 3500A main and all PV
backfeed all of the subsections.
Mark Frye
On 2/17/2015 7
is very small and if one
did, damage to the equipment would be limited that area. This is the
essence of allowing taps.
Mark Frye
On 2/17/2015 6:17 AM, Allen Frishman wrote:Wrenchers,
I run into lots of Service Equipment that has a Large Service Switch
which feeds multiple Sections with the Bus
having a different
experience?
Jason Szumlanski
On Fri, Feb 6, 2015 at 12:56 PM, Mark Frye ma...@berkeleysolar.com
mailto:ma...@berkeleysolar.com wrote:
Folks,
How is the Gen4 Enphase (M250) holding up in the field? Any marked
improvement over M215 in terms of failures
,
DKC
On 2015/2/5 20:08, Mark Frye wrote:
...without a mandatory Stop switch co-located with the
service meter
or main breaker?
How many roof top systems have been installed to date? Many,
many, many,
many.
OK ,now I am a first
Folks,
How is the Gen4 Enphase (M250) holding up in the field? Any marked
improvement over M215 in terms of failures?
Mark Frye
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, if you don't they will
let it burn down, even if you have a 690.12 compliant system that does
not include an initiator switch?
Mark Frye
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Thanks David,
This is very helpful.
Mark Frye
On 2/3/2015 12:04 PM, David Brearley wrote:
Mark,
Bill Brooks’ rapid shutdown article for SolarPro does a nice job
walking through the individual subsections of 690.12.
He also addresses initiation device (type and location), which
the operation of rapid shutdown
and the system be labeled accordingly, not that it needs a dedicated switch
to perform the function.
Glenn
-Original Message-
From: RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org] On
Behalf Of Mark Frye
Sent: Monday, February 02, 2015 4:24 PM
To: RE
Right, so the the kill switch is not really needed, but yet it is
required! ?
On 2/2/2015 1:09 PM, Jerry Shafer wrote:
You pull the meter you close the contact thats it so ypu dont hit the
button but same results
On Feb 2, 2015 11:06 AM, Mark Frye ma...@berkeleysolar.com
mailto:ma
. Either way, pull the
meter, no more AC and no more power to the contactor coil on the roof,
so DC limited to the location of the contactor.
Not really sure how the requirement for the stop switch got into the Code.
Mark Frye
On 2/2/2015 11:11 AM, Mark Frye wrote:
I see. So they have another
Jerry,
What unit did you use?
Mark Frye
On 2/2/2015 7:43 AM, Jerry Shafer wrote:
Wrenches
We have installed some of these rapid shut down units and they are
always located close to the array and ours kill the DC instantly as
long as the inverter was running when this accures did not test
OK. So did you run a line 120V up to the box on the roof to energize the
coil of the relay up there?
Mark Frye
On 2/2/2015 9:13 AM, Jerry Shafer wrote:
The units we have used have a large contactor inside the combiner box
made by AMtec Solar. this was required to control the shut down
AC, when the the main is opened or the meter pulled, the
array Dc will become isolate.
Therefore, there is no need for the stop switch and yet as I
understand it, such a switch is now required by the Code. The switch is
not needed but is required.
Mark Frye
I see. So they have another box on the ground floor with the kill
switch and that box includes a 120/240 vac to 24vdc xfrm to drive the
contactor coil on the roof? So you run 120/240 vac to the box with the
kill switch?
Mark Frye
On 2/2/2015 10:52 AM, Glenn Burt wrote:
Looks like they use
Yes, beautiful. But I am still trying to figure out if it is NEC
compliant. At first pass, it seems like it is missing a few
disconnecting means.
On 1/3/2015 10:48 AM, Larry wrote:
Wow, Jarmo! That is some incredible workmanship and a great way to
interconnect multiple inverters and chargers.
Max,
Don't do the tap alone, you would be overdriving the subpanel. You would
need 200A of OCP somewhere between the tap and sub panel loads. Convert
the MOL to a 200A Main Breaker or install a 200A fused disconnect
between the tap and the MLO subpanel.
Mark Frye
Berkeley Solar Electric
Folks,
Two identical PV modules are mount in an identical fashion and exposed
to identical irradiance.
One module is open circuit. The other is connected to a load and
producing power.
Is there a difference in the temperature of the two modules? If so,
which one is cooler?
Mark Frye
of
strings*1.25*1.25).
I ask because a vendor with a 100% circuit breaker re-combiner states in
their cut sheet that use of the device allow
smaller home run cable sizes from the string combiner to the
inverter. Is
anyone aware of a means by which this claim can be substantiated?
Thanks,
Mark Frye
,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/23/2014 9:41 AM, Mark Frye wrote:
Ray,
I can't follow you all the way down that path.
Is an insulated wire conductor permitted to be use at 100% of it's
rating under continuous operation? No. The ampacity is reduced
enough?
Mark Frye
Berkeley Solar Electric Systems
On 2/28/2014 10:33 AM, Larry Crutcher, Starlight Solar Power Systems wrote:
Ray,
I had a 100AH battery for about 3 weeks of testing. I worked it hard. I even
over discharged it once. It worked perfectly at different charge and discharge
rates
There are so so many well informed people on this list, and I am so lazy.
I wish someone could just lay it all out:
We got the 2012 ABC thing nearly identical to NPPA1 with the set backs
and labeling
We got the 2014 NEC with the de-energizing the conductors and equipment
We got the IBC which
Guess I am missing the thread. Does it even matter anymore what the
rating of the modules is anymore? What is now operative is a rating of
the combined module/mounting system?
Mark
On 2/7/2014 9:38 AM, David Brearley wrote:
There are several SolarABCs reports that speak to this. For example:
So does this help understand why Sunrun bought REC and Snap n Rack?
Going forward the only installable equipment will be provided by large
groups that can afford to test and rate their own panel with specific
racking systems that they also own?
Mark
On 2/7/2014 9:38 AM, David Brearley wrote:
OK. So I will have a high rate of acceptance if it buy an Tyco vacuum
relay, and mount it in a Hoffman enclosure, and then put it on my roof?
On 1/21/2014 5:45 PM, Bill Brooks wrote:
Brian,
The requirement is generic. A listed contactor can meet the
requirement. A standard is only necessary
The un-controlled conductor could be up to 15 feet, 10 on the roof and 5
in the building?
Mark Frye
Berkeley Solar Electric Systems
On 1/15/2014 2:02 PM, Daniel Young wrote:
Here is a link for a video where Mike Holt helps with an explanation
to your question.
https://www.youtube.com
Folks,
I was looking at the SMA micro inverter and notice only connections for
L1, L2 and earth. I thought all grid tied inverters needed a neutral
sense conductor to monitor for phase loss.
Any ideas?
Mark Frye
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.
But, what do I know.
Can anyone shed some light on this?
Thanks,
Mark Frye
Berkeley Solar Electric Systems
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Folks,
Anyone have an idea of what would happen if I connected a bench top DC
power supply with adjustable voltage and current to the pv inputs of a
microinverter that is also connected on the Ac side? Would something bad
happen as the inverter tries to run it's mppt on the ps?
Mark Frye
and therefore by extension does not/can not had a GEC in the
system.
Exeltech (integrated micro-inverter aka. ACPV) does not seem to have a
lug on its chasis.
Has the industry pretty much moved to not requiring a GEC for these
devices and if so, how are the AHJ taking it?
Thanks,
Mark Frye
Berkeley
(*Please note of our new address.)
T: 510.498.3201 ext 747
M: 530.277.4894
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