I agree with Kurt: you need a licensed plumber in your area to advise
you, if you're trying to keep the AHJs happy .
2nd, I'm very sure you don't want an exhaust/ combustion type vent
under the array. I've had several over the years, and seen some arrays
installed over them. They can get fair
Definitely could use some clarification. The 690 definition of an array
says "mechanically integrated", which sort of implies each roof plane is
its own array.
However in terms of actual PV design terminology, each PV system has
only one array which may consist of many subarrays. Even a 25 MW p
The 2nd problem with the Envoy besides cost is that it isn't always
reliable.Communication through power lines is not a new or fresh
idea, and has Always been problematic. Once you install something you
are expected to make it work, and that can be a nightmare on say an 8
module system tha
Hi Dan;
I, like Larry, must be amazingly lucky then, because we've solved power
quality issues for many years with 50mf caps. Usually, its been front
loading washers not running on Trace SW inverters, but also Grundfos CP
pumps, too. Never had a problem, and some of these have been running
The Outback is not a perfect Sinewave. It still has tiny steps in the
wave, and when electronics have a problem, its usually with the wave
form as it crosses zero voltage . Instead of being instantaneous, it
has a few milliseconds of time the wave is at the zero crossing, which
can drive some
k with another model and/or brand.
Dan
--------
On Tue, 10/21/14, Ray Walters wrote:
Subject: Re: [RE-wrenches] Mitsubishi Mini Split fighting with Outback VFX
Off Grid
To: "RE-wrenches"
Date: Tuesday, October 21, 2014, 12:23 PM
The Outback is not a perfect Sinewave. It still has ti
I've not done a side by side comparison, but the Pathfinder seems to be
slightly conservative, especially depending on which latitude sheet you
are using. I sometimes switch sheets and try both, when the latitude is
close to falling between (ie 37 deg, and there is 37 to 43 sheet or a 31
to 37
That's an interesting idea, but all the failed designs they illustrate
don't show the way we usually do it. We don't even bother with an
inlet, as most battery boxes have enough gap around the door to provide
intake air, then the exhaust comes off the top with several feet of rise
to prevent b
That's why we usually have the batteries in a garage, basement, or out
building that is not open to the living space.
I've seen some cases of very well sealed and insulated enclosures
allowing batteries to over heat, and also build up a lot of acid damaged
connections.
Boxes I've seen with more
Have you tried it without the balancing transformer? You described that
the voltage waveform looked good, but the current waveform had
distortion. I would take the X 240 out of the system, and see what
happens. I hardly ever use the balancing transformers, and I never let
the inverters go in
I agree with Jerry; I quit trying to be an appliance salesman in the
90s. Just go Energy star and add more panels and batteries. The damn
inverters no load draw is actually one of the bigger problems; a pair of
Outbacks is about equal to a full size fridge.
R.Ray Walters
CTO, Solarray, Inc
I don't believe the aux is PWM. It should be a straight 12 v 200 mA
output as I recall. Its just enough to run a battery fan, or a 12 v
relay. You shouldn't need anything else. Being current limited, it
doesn't even need a fuse.
Also you need to run both leads (pos and neg) from the aux outp
What you want is already programmed into the inverter. It's called Low
Battery Transfer mode (LBX), its just a program setting on the
inverter. You select this mode in Menu 9, and then its actual battery
voltage settings are in Menu 16.
It will not sell back in this mode, but fromHome Power Ma
I've never seen an inverter not disconnect on low voltage. My
understanding is that they just can't operate below a certain threshold.
However, I have seen behavior as described caused by DC loads that did
not have a LVD in place. Were there any other DC connections to the
battery bank besides
When I had batteries reverse polarity they quickly turned around but
never had their capacity after.
2nd, that is a clear indication of a DC drain that can kept draining all
the way to zero. The strongest batteries keep giving voltage, while
weaker batteries give all they have and become resist
I have only seen this in cases with DC loads and no LVD. Inverter
systems without DC loads would never exhibit this behavior, unless there
was a short in the battery cabling or bad cells.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design E
For small projects like that with sealed batteries, I just use a 12x12 x
6 NEMA 3R box. I build a little 1" foam board box around the battery.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 12/23/2014 3:11 AM, To
We just always use 4/0 X flex cable with a 250 amp breaker, and call it
good. (2/0 with a 175 A breaker)
If you want to make life really hard, you can look at the trip curve of
the breaker (Heinnemans have 3 different trip curves depending on the
model I believe) and then do all the normal NEC
Some other things: If you keep the conduit less than 24" long, which is
recommended anyway for main battery connections, the conduit fill
requirements don't apply. (see exception: 310.15(B)3a2)
Using table 310.15(B)16 yeilds 230 amps for 4/0 at 75 C. Then 240.6
lists 250 amp as the next standa
The Magnums do not have relays available like the old SWs, but you can
run a Zephyr directly from either a Outback FM controller or a Midnite
Classic. Both have a controlled 200 mA, 12 output. I've had occasional
trouble running the Zephyr because as weird as this sounds: the fan can
have a s
Interesting but the price puts higher than a Zephyr and a Solar
Converters Simple Switch, which is about the same thing with a backdraft
preventer.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 1/8/2015 5:39 PM
I prefer climbing gear as its much lighter weight and doesn't drag you
around. I actually think in some cases that traditional fall protection
gear can be more of a tripping hazard than the safety it provides.
However, I was previously under the impression that if OSHA (or in the
islands: HI
rovide that.
William
On Jan 17, 2015, at 11:00 AM, Ray Walters <mailto:r...@solarray.com>> wrote:
I prefer climbing gear as its much lighter weight and doesn't drag
you around. I actually think in some cases that traditional fall
protection gear can be more of a tripping haz
Try Mouser electronics. Otherwise, I'd consider bypassing it, and have
a regular breaker (30 or 40 amp) on theout put.
The tripping was probably because the breaker was malfunctioning.
Usually the SWs will trip their on board computer to shutdown for over
current, and the breaker should never b
Hi Allan;
You didn't mention the DC load center used, but that would effect the
decision, as well as the relative wall space. I've found customers were
very happy with an E Panel setup, as they gained floor/ wall space with
the upgrade as well. I'm tired of still working in old Trace DC 250
Solar is just one tiny little issue that fire fighters have to face.
There's no placard for 5 gal propane bottles stored in the basement.
I'm glad we're looking to make firefighters safer, but this has really
gotten a bit out of control.
Whatever is planned for 2017, I hope there are some sensibl
I haven't used that type, because that type of die doesn't work well
with the thin battery lugs we use for off grid battery cables. Seems
better for the heavy cast lugs.
I currently have a type that makes a crimp similar to the hammer type
crimpers: an indentation on one side and V on the other
Hi William;
Yes I'm getting too old to let manufacturers off the hook anymore. They
just don't pay me enough (wink, maybe if I ever was compensated for
service calls?)
Unfortunately I have had the exact same experience with SMA's phone tech
support. I was having setup issues that were not co
We looked into this recently as well, and didn't find any good options
that didn't involve us making a custom gizmo of some type. The closest
off the shelf product I found was just an AC smoke alarm that chirps
when it loses AC. I think some of the little UPS boxes also have an
alarm when th
I know we beat this earlier on the thread, but I had similar problems
with SW inverters back in the day, that were fixed with a 50 mF cap.
Reread that whole throead as there were definitely potential problems
associated with that fix, but we found it worked fine, and never had any
other issues
Where do you get the Solarworld small modules from? I haven't seen
those in a very long time.
AEE is carrying Dasol 12 v modules, from 20 w up to 135 w.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 2/24/2015 1
I think the jet tub is the better way to go for off grid. You are only
heating the water and running the circ pumps a few hours/ week, and as
Bill mentioned: no chemicals.
I've tried all of the choices, and while hot water alone is nice, having
the massage bubblers is definitely better. Not ha
abcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 3/3/2015 4:33 PM, William Miller wrote:
Ray:
Nothing is more civilized than heated flush water!
William
On Mar 3, 2015, at 10:30 AM, Ray Walters <mailto:r...@solarray.com>> wrote:
I thi
I recall seeing simple cardboard box models being demonstrated by NMSEA
at Solar Fest. They would get to about 275 F, while their huge trailer
mounted mirror device got to about 325F, as I recall. The main flaw in
all solar cookers is no backup source of heat, so that if it gets
cloudy, etc.
Hi Larry,
I think you hit on the best load already: water heater elements rated
for 120 v. We have also used dump loads for wind turbines like the air
heating elements from Bergey, but they are only about 1 kW each.
Another possible source are the resistor banks for old golf carts
(before t
de of the barrel. Might even be able to install them into a section of
pipe with Ts and run water through it to cool the elements.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 3/17/2015 1:40 PM, Larry wrote:
He
Hi James;
So couldn't Larry weld in rigid conduit fittings? Aren't they NPSM, or
do I have that wrong? I suppose the Zinc plating would make a messier
weld and possibly be poisonous
Also to Chris Mason, I was not aware that load banks were available for
rent. That sounds like a good op
Hi Kevin;
I have both a comment and a question:
Comment) I thought that while charging, the AC loads were simply powered
directly by the generator, and the inverters were operating strictly as
chargers. My experience is that it is almost always an issue of poor
waveform regulation with the g
I'm sure somebody more knowledgable already mentioned this, but back in
the last century, when wiring up C40 charge controllers for micro hydro,
they were wired between the battery and the dump load, not between the
hydro unit and the batteries. Basically the turbine ran fully loaded
all the t
grid? Did you have any issues with controls not working on the Magnums?
Thanks,
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 3/19/2015 3:40 PM, Kevin Pegg wrote:
Hi Ray,
This is a bit of old news for us, goes
Design Engineer
303 505-8760
On 3/20/2015 11:43 AM, Kevin Pegg wrote:
Hi Ray,
Our work is almost exclusively off-grid so wasn't able to test if same result
charging from grid. These sites also had previously installed generators of
different types, all tested out fine, commonly 12 kW or b
What's the reasoning behind two different battery banks at different
voltages? What is the other equipment involved: batteries type, age,
inverters, etc.?
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 3/24/2015
48v setup with dual outback inverters and dual SB3048 CCs. Lead
acid batteries as well. 3 years old
I've never had this come up in 16 years!
Jeremy Rodriguez
All Solar, Inc.
1463 M
Penrose Colorado 81240
Sent by Jeremy's iPhone. Sorry for typos and shorthand!
On Mar 24, 2015,
Also, the Frigidaire washer is really delicate; I had one cooking
controls every year as described, and it was On Grid. The solution
there was to put it on an Outback backup power supply, as the grid was
often out of voltage specs.
Another thing I saw once with the SW inverters is they can par
This has been an issue on some of our systems, but strangely not most of
them. I have not figured out a correlation yet. We have dozens of pole
mount and roof systems that shed snow as soon as the sun comes out, and
then some that ice up and are a real mess all winter. The only
difference I
We have used the underlayment material to line battery boxes. Turns out
it gets eaten by the acid too, not recommended. Really the best product
I've ever used is just the heavy plastic sheeting to line the inside of
the box. I had batteries crack and leak acid almost 2 inches deep, and
the
Acid will eat spray on bed liner too
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 3/30/2015 10:36 AM, Benn Kilburn wrote:
Hi Bill,
Think "spray-on". Build your box then spray on the liner.
Have you seen "spray
I used an Ecogen recently, and I liked many aspects of it. However the
continuous draw of the on board electronics is just ridiculous for an
off grid generator.
A 15 w solar module charging the start battery was barely able to keep
up with the draw. Running AC off the inverter to the generator
Hi Folks;
I am considering hiring an apprentice, and I wanted to know if any else
has tried this, and what advice and experience everyone had to offer.
Also what would be the best way to advertise: Craig's List? /
Wanted passionate techy soul to share warm fires and cold brews with,
watch bea
om:*RE-wrenches
[mailto:re-wrenches-boun...@lists.re-wrenches.org
<mailto:re-wrenches-boun...@lists.re-wrenches.org>] *On Behalf Of
*Ray Walters
*Sent:* Thursday, April 16, 2015 4:50 PM
*To:* RE-wrenches
*Subject:* [RE-wrenches] Apprentice
Hi Folks;
I am co
1988"
*P*Please consider the environment before printing this email.
*From:*RE-wrenches [mailto:re-wrenches-boun...@lists.re-wrenches.org]
*On Behalf Of *Ray Walters
*Sent:* Friday, April 17, 2015 2:53 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Apprentice interview
Hi All;
Than
I agree with Windy and this article, the electric sounders can be
finicky. I've never tried the airline method, but some well folks from
Texas taught me to use an inverted plumbing fitting on a string. When
it hits the water you can feel it on the line, because the small pocket
of trapped a
Gravity only acts downward. The modules are rated to 113 PSF which is
with the module laying flat. If the module is at an angle, it can take
more downward force.
For instance if it is at 70 degree tilt, It could take a downward force
of 113 PSF / cos 70 or 330 PSF.
Its possibly reasonable to
equate
training enabling the apprentice to acheive the target qualification.
On Apr 17, 2015 4:53 PM, "Ray Walters" <mailto:r...@solarray.com>> wrote:
Hi All;
Thanks for the replies so far; I apologize for my misunderstood
attempt at humor in my initial post.
Solar Design Engineer
303 505-8760
On 4/28/2015 6:52 PM, Chris Mason wrote:
I think you should describe the job as a trainee. You can do anything
you want after that. Just don't call it an apprenticeship.
On Tue, Apr 28, 2015 at 8:45 PM, Ray Walters <mailto:r...@solarray.com>>
Hi Luke;
I would say that the ability to think is the primary attribute I'm
looking for, and the difference between an apprentice and a laborer. It
is indeed rare. Most folks really just don't soak up much of the
knowledge we're trying to pass on, either due to lack of interest or
lack of b
oldcastleprecast.com/enclosuresolutions
I was just looking at these enclosures for a potential battery enclosure
to set in the ground for more stable temperatures.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On
Hi Jarmo;
Early solar systems actually tried to use the principle of matching
array Vmpp to battery voltage in lieu of charge controllers. The
biggest issue is that when it is is hot the module voltage can drop
below the battery voltage needed, and when its cold the voltage will
still be to
Most pole mounts do not go to 90 deg. BTW. The pivot would need to
stick out South of the pole. We make specialty racks, and could build
something like this for you.
Contact me off list.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design
Hi Allan;
This is an interesting thread, as all of us ( I think) have gone heavier
on the solar arrays and lighter on the battery banks based on
economics. I too have noticed higher gassing and more water
consumption, and I too have adjusted set points down slightly to account
for this. I th
Hi Bill;
If the battery is in an insulated box indoors, it definitely can over
heat. Also if ambient temps get into the 90s, the additional heat from
charging can push the battery into the danger zone. In hot desert or
tropical climates, it may actually be difficult to keep the battery
belo
I thought I'd post some info on Battery Temp from a few manus:
HUP Solar One: do not exceed 105 F
Full River AGMs: max recommended operating temp 104F
and from Trojan: for every 10C increase in temperature the reaction
rate doubles. Thus, a month of operation at 35C is equivalent to 2
months a
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 5/22/2015 6:07 PM, jay peltz wrote:
Hi Ray,
Cold isn't a problem. It reduces capacity and yes they could freeze,
but it doesn't shorten life ( I mean besides the freezing part) in
fact cooler batteries last longer.
But ho
Having the LVD be temperature compensated so that the load is always
disconnected above the freeze point of the battery would be a Huge
Improvement on the whole concept of LVD. In combination with State of
Charge monitoring, like the Whiz bang Jr, would be the most effective,
and just program
I've seen a couple of homemade pole mounts that were really good, but
most are not properly designed. Fabrication experience is good, but the
problems I've seen were design issues, not bad welding. (this goes for
commercial racks too) Ground mounts are less prone to errors, but pole
mounts ar
Around here, wood dry rots around the screws, so after about 5 years,
timber built frames are blowing apart. While it might be possible to do
a decent timber base frame using pressure treated wood and carriage
bolts for the attachments, you could not use wood for the final cross
rails as you no
Yes, amorphous modules degrade faster then crystalline cells. 15 years
will really start catching up with you, that's why we always tried to
stick to monocrystalline when we could.
I think your best option for now is to rewire the array for much higher
voltage. Even your current voltage problem
I agree, scratch my previous suggestion of 8 in series on the Outback
controller. I got so used to Midnites that I forgot how unforgiving
the Outback controllers are with high Voc. Run the Unisolar modules
through the Midnite sizer. http://www.midnitesolar.com/sizingTool/index.php
R.Ray Wal
, jay peltz wrote:
HI Ray,
Can you tell me/us where you have your data on the a-Si having higher
voltage degradation over time?
thanks
jay
On Sun, May 31, 2015 at 11:31 AM, Ray Walters <mailto:r...@solarray.com>> wrote:
Yes, amorphous modules degrade faster then crystalline
I think an important point, is not to connect to their system in more
than one place. You don't want to create any loops that would pick up
the induced current from a lightning strike. We've bonded to the
lightning rod systems at their attachment to ground. The idea being
that if their syste
The breaker post weakness came up on the list a couple of years back,
and Midnite responded by switching to the sturdier post. I haven't
tried the 300 v versions though. I also haven't kept up with what
Outback is using, but that post design should have never been used on
anything beyond stra
Actually its much more cost effective to use charge controllers than GT
inverters for the PV input. Just price out a 4 Kw GT inverter of your
choice compared to a Midnite Classic for instance. It's in the ball
park of 25 cents/ watt savings, and that's not chump change.
I only use AC coupling
HI All;
Anyone heard of or tried these controllers:
https://genasun.com/products-store/mppt-solar-charge-controllers/golf-cart-solar-charge-boost-controllers/
They seem like a great idea: use a single 60 cell module to charge a 36v
or 48v golfcart battery pack. The good old 60 cell (39" x 65")
Besides your note that cordless impact drivers can over torque the
clamps, also they spin the bolts too fast which can lead to spalling of
the SS hardware.
We now hand torque those connects. Finally, most torque specs are for
lubricated bolts. We use anti-seize on the threads before torquing.
phenomenon.
Sincerely,
Glenn Burt
Sent from my 'smart' phone so please excuse grammar and typos.
----
From: Ray Walters <mailto:r...@solarray.com>
Sent: 6/28/2015 17:27
To: RE-wrenches <mailto:re-wrenches@li
Climbing, Safety & Rescue
Wind/PV Design Engineer
Windsine LLC
631-514-4166
www.windsine.org <http://www.windsine.org>
On Jun 29, 2015 12:32 PM, "Ray Walters" <mailto:r...@solarray.com>> wrote:
Anti seize also comes in larger cans with a brush, but it still
c
This is fascinating because while I knew the DC cables had an AC
component, I never realized how much inductance played in the volt drop
to the inverter. Thanks for bringing this to our attention Jarmo.
Which brings up another question based on Benn's question: isn't the
battery itself part of
You would think that a computer device that retails for more than many
laptops would be able to afford more memory, a bigger screen, and an
interface that didn't feel like preWindows DOS.
I just don't even bother with Outback much anymore. Other companies'
solutions work better, are easier to s
Seems like something wrong with the generator, if the Vac is going that
low, or there's a loose connection eating voltage somewhere.
The Outback might still try to charge, but not be able to actually
produce any amps with that low an input voltage.
Check the Vac at the genny when this is happenin
Hi All;
My Fluke 36 clamp on DC meter just died again. It will not zero. This
happened before, and I had it repaired, but I think its time for a new
one, as its 15 years old.
What are folks using these days? I'm looking at the Fluke 376; it does
AC/DC current, but also is rated to 1000 v, wh
o:re-wrenches-boun...@lists.re-wrenches.org>] On Behalf Of
Ray Walters
Sent: Wednesday, July 15, 2015 5:20 PM
To: RE-wrenches
Subject: [RE-wrenches] Clamp on Meter
Hi All;
My Fluke 36 clamp on DC meter just died again. It will not zero.
This happened before, and I had
I thought the APT panels had Square D QOU breakers? Also Midnite makes
an adapter plate that lets you use a newer panel mount DC breaker in the
place of the old medium Heini breakers. Might not help there.
I added an MPPT controller to an APT center a couple years ago, and I
just added a small
I've seen both on the DC side. The QOU also had a high VDC rating (125
v as I recall).
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 7/18/2015 9:51 PM, Allan Sindelar wrote:
Ray,
The AC breakers were Sq
Sindelar wrote:
Ray,
If you have, it wasn't correct. The CFs are 1" wide, the QOUs are
3/4", and the mounting holes are 1" apart. Are you sure?
The CFs have a 125 VDC rating.
Allan
**
On 7/18/2015 10:27 PM, Ray Walters wrote:
I've seen both on the DC side. The QOU
My opinion is that if the L foot has enough surface area it constitutes
a flashing, and that large flashings can actually cause more damage to
the roof than they prevent.
I also agree that an attachement doesn't constitute a penetration. I
just finished an install on a metal roof with hundreds o
Hi William;
First, a sealed L foot is not a sealant only attachment system. It has
quite a bit of surface area beyond the hole just like a flashing, and
has mechanical attachment through the roof to the structure (which a
flashing often does not). I consider an L foot to be a mini flashing fo
array, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/7/2015 12:08 PM, Jay wrote:
Hi Ray
Can you elaborate on how a large flashing can cause more damage than it
prevents?
Thanks
Jay
Peltz power
Sent from my iPhone
On Aug 7, 2015, at 10:
I've used Lexel before, it's the best clear caulk I've used. I used it
even to repair cracks on plastic lens on concentrating modules. It holds
its clarity for a long time, however I don't know if its approved for
asphalt shingles.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installe
Oh I'm going to risk the wrath of Trojan and others, but I can confirm
issues with the Trojan L16 having premature cell failures within a
couple of years just as you reported. We use the T105 RE and have not
had problems, but stay away from their L16 line. I otherwise do not
know or understan
er
303 505-8760
On 8/12/2015 8:26 PM, Jay wrote:
Hi Ray
Would that be random dead cells?
Jay
Peltz power
Sent from my iPhone
On Aug 12, 2015, at 6:44 PM, Ray Walters wrote:
Oh I'm going to risk the wrath of Trojan and others, but I can confirm issues
with the Trojan L16 having
These were the REs
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/13/2015 5:32 AM, Dave wrote:
Ray,
Are these the base model Trojan L-16's or the L-16RE's?
David Palumbo
Independent Power LLC
462
What would be nifty, is if the chase was at the angle of the roof, so
that its top edge was level. Then instead of being a trip hazard it
could be a step.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/14/201
HI Esteemed Wrenches:
I am consulting on a system I have never seen, that consists of a 6.7Kw
Enphase roof mounted system, and 2 backup generators. Each generator
has an automatic 200 amp transfer switch to back up its own 200 amp
panel. Both 200 amp panels are fed by a 400 amp service from
lectrician
Solar Design Engineer
303 505-8760
On 8/17/2015 8:36 PM, Jerry Shafer wrote:
I cant see this working well without some battery based inverter
Jerry
On Aug 17, 2015 10:10 AM, "Ray Walters" <mailto:r...@solarray.com>> wrote:
HI Esteemed Wrenches:
I am consul
me I look at AC coupled setups, I just want to start over with
charge controllers.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/17/2015 9:39 PM, Mac Lewis wrote:
Hi Ray,
With that size grid-tied system, you woul
ler,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/21/2015 7:45 AM, Starlight Solar Power Systems wrote:
Ray,
I’m curious about what you mean by not doing a 3 stage charge. While
PV charging in coupled mode (off grid), the battery will reach your
absorption set point. Is th
8/21/2015 7:45 AM, Starlight Solar Power Systems wrote:
Ray,
I’m curious about what you mean by not doing a 3 stage charge. While
PV charging in coupled mode (off grid), the battery will reach your
absorption set point. Is this triggering the GT inverters to shut off
or does the battery inv
here in Hawaii ($4.99 a tube). I have also heard that black zips
or sealant holds up better in the UV light, and my field
experience seems to validate this.
On Tue, Aug 11, 2015 at 5:09 PM, Ray Walters mailto:r...@solarray.com>> wrote:
I've used Lexel before, i
That was exactly the failure I anticipated when using flashings. Tearing
up the shingle to shingle adhesive and pulling those nails out is more
disruptive than the actual attachment itself. I'm going to flash on an
upcoming job for legal/ insurance reasons, but not because its better.
I too ha
Hi Wrenches;
I have an upcoming project to be inspected, ,and having spent too much
time on off grid and out of country work, I'm now playing catch up with
the new 690.12 and 690.71(H) requirements.
The proposed GTB system is 3 Radians with a ground mounted 18kW array
and large HUP battery ban
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