of AC coupling as others noted is also a decent option, but
when I last looked, it is much more expensive.
Charge controllers are much cheaper per watt than inverters for a 48 vdc
battery.
Ray Walters
On 12/17/2012 12:15 PM, William Miller wrote:
Sure we'd all like to be able to p
structure. I think combining these will become more common place
in the future.
Ray Walters
On 12/21/2012 7:40 AM, Drake wrote:
Another approach that customers have opted for is to build a carport
or outbuilding. The money spent toward a rack can be used to make
the array location a multi use
, but I would
imagine it would have a voltage dip on surge too.
Perhaps some capacitance might help too?
Ray Walters
Solarray, Inc.
On 12/23/2012 8:45 AM, Howie Michaelson wrote:
Hi All,
I am trying to help my brother-in-law figure out if he can continue using
his Magnum MS 4448 AE in his
The ballasted idea is good, and I've also done what you are proposing
below, which is a hybrid ballasted/ anchored system. Epoxy is the best
anchor I've ever used, just make sure the hole is really clean before
putting in the glue.
Also I'd make the slab bigger to enhance the ballast effect.
I've had clients freeze water outside for years and bring the ice (in
gallon jugs) in to the fridge. It cuts the run time by at least half
and is free. I've also done the chest style freezer conversion to
fridge, but people don't like that as much.
Its hard to use the space.
f the rail, it acts as a
decent cable tray.
I've used Haticon and it has some advantages, but also its own problems:
their clamps are not the greatest.
Ray Walters
Solarray, Inc.
On 1/18/2013 3:04 PM, August Goers wrote:
All -
This thread brought up a question I've been mulling o
Hi Hilton;
Can you share any Pics? Sounds just like what I was thinking of making.
Ray Walters
On 1/18/2013 3:40 PM, Hilton Dier III wrote:
I made a pair of jigs out of some two foot lengths of 20-80 (That 1"
square aluminum extrusion with bolt slots on each side) and some
unequal-leg
Just to demonstrate the variance between jurisdictions, I recently did a
system in a rural county in Oklahoma. There was no inspection process
and folks were allowed to do their own wiring without a license.
Essentially there was no AHJ at all. The utility did require a single
line diagram, b
Hi Allan;
I've been in the same conundrum lately. I found that AEE and others
have 12 v modules (Solartech), but the price per watt is double or
triple. My take is that somewhere around 200 to 400 watts, its more
cost effective to go to the GT modules with an MPPT controller. Blue
Sky make
2013, at 1:15 PM, Jay Peltz wrote:
Hi guys
I've buying the new 6" cell x 72 cell from Trina from a few suppliers.
Big yea, but same 44voc so it's an easy add to existing systems.
A huge relief.
Jay
Peltz power
Sent from my iPhone
On Jan 24, 2013, at 12:11 PM, Ray Walters <
Hi John;
Would we not need an MPPT controller, just a regular PWM type,
then? That might be a solution for these democracy arrays.
Ray
On 1/24/2013 3:16 PM, John Berdner wrote:
or doesn't have full output at 120 v, so you need
a transformer to get a balanced full output from it. Maxing out one
leg, while the other leg is unloaded will eventually cause uneven wear
of the generator.
Ray Walters
On 1/27/2013 4:20 PM, toddc...@finestplanet.com wrote:
just curious...
Those look interesting, especially the 20 Kw unit that is 1800 rpm.
How's auto start, is it two wire?
Does it have a no load draw for its electronics like the other newer
standby generators?
And finally does the warranty still apply for off grid use?
Thanks,
Ray Walters
What On 1/29/2
I just found Generac's Off grid model 6 Kw. I know I've heard nothing
but $%& about Generac, but this unit appears to actually be designed
specifically for off grid, and has a special oil cooling system and
runs at 2600 rpm. Anybody dare try one?
one. Kohler used to make a 6.5 Kw that fit the one inverter household
fairly well.
Ray Walters
THeOn 1/30/2013 8:55 AM, Larry Crutcher, Starlight Solar Power Systems
wrote:
Randy,
I concur, the Cummins/Onan generators are built well and are reliable.
They provide a 1 year, 1000 hour warranty fo
tronics to go bad either.
Ray Walters
On 1/30/2013 3:02 PM, penobscotso...@midmaine.com wrote:
From an environmental standpoint I would always recommend propane over
diesel because of spillage and diesel fumes. I believe propane is much
cleaner burning, although likely the CO2 is probab
tely an
option, but last time I used one, they were not UL listed or set up to
wire in a code compliant manor.
Ray Walters
On 1/31/2013 3:13 PM, Allan Sindelar wrote:
William,
Yes, that's my understanding. Outback acknowledged this to me years ago.
Allan
*Allan Sindelar*
_Allan@positiveen
with current
calculations that corresponded to NEC 2011, alas that computer was
taken, before I ever backed it up. Maybe I should take another
stab at it. I'll incorporate your metric info too. I guess this
is what they call "open source" development.
type
breakers (like Outbacks) can have multiple lugs on the same stud, or use
a double barrel lug.
Thanks for your help,
Ray Walters
___
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
Options & setti
Table from the Square D catalog for QO breakers shows a very limited number
of breakers/wire sizes that can be double lugged.
-Glenn
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ray Walters
Sent: Mond
Several types of lifts are available at rental yards. We've used a hand
crank type air conditioner lift to move 8 modules up at a time. For
anything over 10 modules, its really a good idea to use something
besides a man on a ladder, especially with today's larger modules.
--
R.Ray Walters
CT
I've got a project right now on a steel roof. I was just at a trade
show last week, so I got to look at the latest gizmo from S5.
I didn't like it at all, it didn't go into the valleys like the old
mount, but drilled 4 holes into the side of the ridge, and just counted
on the roofing to hold th
cts. They self drill and we have had no instance of
them snapping off while being driven.
William Miller
At 09:26 AM 2/18/2013, Ray Walters wrote:
I've got a project right now on a steel roof. I was just at a trade
show last week, so I got to look at the latest gizmo from S5.
I didn'
I'd try a set with a few adventurous customers, but the price needs to
be really good for Beta testing. Once you get a couple of years of
proof of concept, and work out the charging details, etc. then your
friend could set the price higher. Its all about amp hours and cycle
life. If he can p
Hi William:
I'm working on an off grid charging station for a Chevy Volt. I decided
to stick with the onboard 120 VAC charger, as the slower charge rates
are more efficient for both the house and vehicle batteries. Its the
old Puekert's # issue: the faster the charge or discharge rate, the
http://nationalcarcharging.com/downloads/
has several models of 240 vac chargers with full spec sheets. I just
met them at a trade show.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified, Licensed Contractor
808 269-7491
On 2/22/2013 5:29 PM, William Miller wrote:
Friends:
I would not both
HI Jeremy, Bob;
That's the little strap that would slice you open if you weren't
careful. That's a very hard box to work in just with one inverter. My
recommendation would be to switch that box out for dual inverters. Use
Outback's Flex 500, or Midnite's Notagutter. You're trying to save t
I never recommend trying to fully charge with a generator anyway: its
too fuel inefficient. A good 4 hour bulk charge from 50% back to 80%
SOC, and then hope the sun shines again. I usually set the voltage on
the high side (they usually run the it in the winter), and program the
run time to 4
HI Chris;
Just to be clear, the cables are not going to fail just because they
aren't code compliant; unless you meant they would fail an inspection.
I've included a picture of my own service rated at 150 amps. Using
table 310.15(B)7 (which I believe is the correct table for sizing the
serv
Hi Guys;
I have a project that will need multiple small battery based inverters.
Each one will only be running a 100 w max. computer power supply, so
there are no significant surges, and modsine will be fine (most small
UPS systems only put out modsine) Avg load will be 20 watts.
I know the
nuing Education Providers
970.672.4342
On Wed, Mar 13, 2013 at 10:01 AM, Ray Walters wrote:
Hi Guys;
I have a project that will need multiple small battery based inverters.
Each one will only be running a 100 w max. computer power supply, so there
are no significant surges, and modsine will
e and of course many of the Morningstar units.
Thank you,
Maverick
Maverick Brown
BSEET, NABCEP Certified Solar PV Installer ®
President & CEO
Maverick Solar Enterprises, Inc.
Office: 512-919-4493
Cell:512-460-9825
Sent from my HondaJet!
On Mar 13, 2013, at 11:01 AM, Ray Walter
That looks great Eric; thanks for
sharing. For this particular market (under 1000 watt inverter)
UL/ ETL listing is just not an issue. As soon as we're going for
a full on code compliant house system, complete with Finicky AHJ,
we're looking at Magnum or Outback
Very interesting, as I'm going out on my first metal shingle roof
tomorrow morning. We were going to use a regular Soladeck. I'll let
you know how it goes. I'm thinking I can trim it with a tin
snips(famous last words?)
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Lic
How is this roof type for flashing? Do you just cut it with a tin
snips? My project only entails replacing an unflashed conduit
penetration with a Soladeck, so I'm hoping it won't be too bad.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Des
Szumlanski <mailto:ja...@fafcosolar.com>> wrote:
Tin snips does the trick. I have a guy with 20+ years of roof
experience that's a craftsman with snips. It's easy to butcher it if
you let a junior guy do it.
*Jason Szumlanski*//
/Fafco Solar/
On Thu, Mar 21, 2013 at 11
Hear, Hear, Carl.
That has also always been my experience as well. In my off grid work,
reliability trumps budget, and I almost always over size charge
controllers, relays, inverters, fuse holders, etc. Most failures seem
to be related to pushing the design limits of the equipment.
I spent t
Also, Windy Dankoff's old spread sheet that I adapted calculates
generator run time per week, and Maui SOlar software does a good job of
calculating generator hours per year. I've used Homer and found it to
be pretty far off from off grid reality.
Any off grid application is going to benefit fr
I've never seen battery connections come loose with thermal activity, as
long as they had a regular split lock washer on. I've gone back on our
own work that is over 13 years old, and all is still tight. As Allan
noted, I have seen plenty of failures due to untightened, and improperly
crimped
I just finished a rewire and we kept the Ananda power center, Allan :-)
Back when we used class T fuses more they were always over sized
relative to Heinemann breakers.
400 amp class T fuse = 250 amp breaker= 4/0 cable
200 amp class T fuse = 175 amp breaker= 2/0 cable
I still think class T fuse
8a standards.
AGMs might not be for every installation, but for jobs where they are
appropriate this could be a good, code-compliant solution.
Phil Undercuffler
OutBack Power
On Friday, April 5, 2013, Ray Walters wrote:
I just finished a rewire and we kept the Ananda power center,
Al
Fellow Wrenches;
I am consulting on a larger project out of country, and the utility is
(as usual) concerned with disturbances to the grid from the variations
in solar output. I know that most of the latest utility scale inverters
have some ability to control the rate that power ramps up and
standards.
AGMs might not be for every installation, but for jobs where they
are appropriate this could be a good, code-compliant solution.
Phil Undercuffler
OutBack Power
On Friday, April 5, 2013, Ray Walters wrote:
I just finished a rewire and we kept the Ananda power center,
Alla
Chris Freitas is my hero; that was true wrenching, even better that his
mad scientist's experiment is still relevant 20 years later. Here's a
link to the full article I stumbled on to last night:
http://www.ibiblio.org/london/alternative-energy/homepower-magazine/archives/27/27p26.txt
Very co
Hey Bob;
Can you share that AIC vs Voltage chart?
Thanks,
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 4/9/2013 1:46 PM, boB wrote:
Those 250 amp and 175 amp breakers we have used for many many years now
hav
Hi August;
250.162(A) says "operating at greater than 50 v", which a 48 v nominal
system operates most of the time at over 50 v, at least when solar
charging and/or selling back.
We used to get dinged many years ago for using breakers rated at 50v dc
on 48 v systems. John Wiles used to insist
Hi Drake;
Read down a bit more and 250.166(C) and (D) limit the size of the GEC to
#4 or #6 max., depending on what electrode is used.
This used to not be the case, and systems in the 90s had 4/0 cable to a
5/8" electrode: which just like your 1/2" pipe example was absolutely
ridiculous.
R.R
nal Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ray Walters
Sent: Tuesday, April 16, 2013 12:52 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Fuse sizing in battery circuits
Hi Drake;
Read down a bit more and 250.166(C)
anks,
Garrison
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ray Walters
Sent: Tuesday, April 16, 2013 2:22 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Fuse sizing in battery circuits
First, a water m
The old 50uF cap trick worked on Trace SW Inverters as well to run other
Hi Efficiency washers. I thought it was the zero crossing issue, but
what you're showing for PF makes more sense. I knew the caps worked, I
just didn't fully understand why. Thanks, Larry.
R.Ray Walters
CTO, Solarray,
I have to mention that Schletter has not been very responsive to
projects that are less than a MW these days. Nothing worse that
promising a customer something, only to find out you can't even get a
price on it.
Meanwhile an outfit that WILL return your calls and has a good
engineering staff
We've used them before, just check the in-lb ratings of the connectors
you'll use them on. Ours went to 36in-lb, and for more, we just used
our torque wrench. I'm now using powered screw drivers with torque
settings, and then do a final check with the wrench.
http://www.milwaukeetool.com/powe
Principal Engineer
Heliocentric
801-453-9434
tahar...@heliocentric.org <mailto:tahar...@heliocentric.org>
On Apr 5, 2013, at 10:12 PM, Ray Walters <mailto:r...@solarray.com>> wrote:
I just finished a rewire and we kept the Ananda power center, Allan :-)
Back when we used class T fuses more
HA, HA, HA. you must be joking
Sorry Bruce, just we've been in this situation many times over the past
few years; It's been a real pain. I actually think the best thing might
be to pull some 175s out of service on a system upgrade for one customer
in order to use them for other customers'
Black UV resistant ties only last a few years at altitude in New Mexico
and Colorado. UV is brutal, and causes PVC conduit to discolor within 2
years. The zips will actually hold for 10+ years, but aren't really
strong. I've come back on my own work, and just yanked on them, and
popped them
I'd go for using that extra module with the damaged frame. What is the
frame damage going to do to the system?
Is it bad enough that the module could quit working later (bad edge seal)?
The voltage mismatch isn't the end of the world either, but your over
all year round performance will be bett
Modules aren't exactly constant current
devices.
They are for much of their voltage range, up to a voltage a bit
below the MPP, and then the current starts tapering down to 0 at
Voc. The entire string can only pass as much current as the
lowest current mod
Hi Folks:
I just finished up another ugly rewire project for a customer that had
another"installer" put in a Xantrex TR inverter.
We fixed numerous wiring issues, including neutral bonded to ground in 7
different places!
The issue we're having now though, is that the TR inverter output
voltage
problem
inverter.
Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.com
t: 541-568-4882
On 4/30/2013 3:19 PM, Ray Walters wrote:
Hi Folks:
I just finished up another ugly rewire project for a customer that had
another"installer" put in a Xantrex TR inverter.
We fixe
ause I got a follow-up call about the survey.
There never has been a follow-up to correct this customer's problem
inverter.
Kent Osterberg
Blue Mountain Solar, Inc.
www.bluemountainsolar.com <http://www.bluemountainsolar.com>
t: 541-568-4882
On 4/30/2013 3:19 PM, Ray Walters wrote:
Yes, Bethoven's Fifth symphony played backwards at half speed is quite
effective. However, the array direct turntable varied in speed with PV
insolation, making it hard to predict when the owner should go out to
flip the record over.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Insta
I'd echo Bob-O on this and also add that when diagnosing others' work
over the phone, it often is completely different issues when you get
there. You have no idea if for instance he's actually got the modules
wired correctly, he may have a loose connection(s) there, the parallels
may all be lo
Take a charge controller with you that is sized for that array.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 5/12/2013 11:57 PM, Ron Young wrote:
Hello all and thank you for the illuminating replies. One thing
Greetings Wrenchies;
I have had a few inquiries for larger flow rate pumps, and was wondering
what the latest on Lorentz pumps was. They show some commercial models
with high flow rates (30,000gpd) but I haven't gotten any response from
the company directly.
I have three questions:
Are there
ps.html to get the
latest about Lorentz, or maybe team up with a licensed pump installer
and do the solar part.
We have had great results with the Grundfos SQFlex system for anything
that we have installed and haven't found the need to specify a Lorentz.
Good Luck
On Sat, M
You can plug your module specs into this:
http://www.midnitesolar.com/sizingTool/index.php
to see if the Midnite Classic might work for your configuration. At
lower array voltages, the Classic 150 can exceed 2500w arrays.
Depending on how critical the reliability of the system is, I often go
to
Our only protection at this point is
the Wrenches list. If anybody on the list is seeing premature
failures, we need to know. You folks have saved my tushy many
times in the past. For now, I've stuck mostly with Solar World,
and not had problems. I will not be
First Solar's thin film is definitely part of the industry's early onset
under performance problem.
With monocrystalline under $1/watt, I just don't understand why big
projects are still going forward with thin film.
I would only use thin film for partial shading, or curved, odd shaped
surfaces.
We just serviced an old SnapnRack install, and we found the usual: most
of the mounts had been over torqued and the SS bolts had spalled. With
a bottle of anti-seize and a torque wrench we replaced the damaged
hardware and all went well.
I like the end clamp that grabs the module from underne
First Solar was not performing to warranty within the first 2 years.
They supplied more modules, but not the additional land, racking, labor,
wiring, etc to make up for the low performance.
I've watched thin film companies come and go for 2 decades. As I said
before, I think they have they're p
Depending on the original work, I'd look at sealed batteries and leave
it alone. I've done a bunch of rewires, and you're really wasting the
customer's money to rewire 80 watt modules. ( module J boxes are so
1990s) Meanwhile those 80 watt modules have decent resell value for
small 12 v sy
I 2nd that idea. I'd just add that we have the tile extend a few inches
under the array, and then the roofer doesn't have to come back. It's
also a great look, as the Array is just a couple of inches above the
tile, so it appears to be almost flush mounted, and the tiles appear to
be continuo
I've definitely found several AC only switches burned permanently into
the "ON" position, so its a real concern. We use surplus switches
removed from old houses that are DC rated. I got a collection from
Habitat Restore. They don't say AC only, and are very loud when
switched. Pull chain lam
I'm building a small power control board this weekend, and I have a
stupid question:
Can Midnite Temp Sensors be used with Trace C40s?
They DO plug in.
I recall that Outbacks were not compatible.
Thanks as always,
--
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Maste
This seems like another well meaning but slightly awkward code
requirement. I think it would be sufficient to list the nominal battery
voltage (very important to know) and then the actual variation in
voltage is not going to be too hard to comprehend.
Knowing array Voc is also very important.
Take it off the wall, and watch out for the really short wires to the
fan on the cover you are removing.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 6/12/2013 4:16 PM, Todd Cory wrote:
wrenches,
i have a cus
Outback is hiring tech support personnel: $12 to $14/ hr, no experience
necessary.
I think more BS is in our future.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 6/12/2013 4:58 PM, Bob-O Schultze wrote:
mucho
The convention of red for positive and black for negative is not just
automotive. It is also used by all battery based inverter manus, all
battery companies, and all multimeters.
John Wiles also agrees;
red = positive, black = negative for ungrounded systems
red = positive, white = negative fo
Richard, when you use your Fluke 87 to measure Vdc, black is negative,
red is positive. The black is labeled common because the meter can also
be used for current measurements. (I have a Fluke 89)
When you start using black wire for positive, it may be allowed by code,
but there just isn't a g
Watch out for accountants who become installers. They always
thing red negative and black positive.
David Katz
Sent from my iPhone
On Jun 28, 2013, at 5:40 PM, "Ray Walters" mailto:r...@solarray.com>> wrote:
> Richard, when you use your Fluke 87
become installers. They always thing red
negative and black positive.
David Katz
Sent from my iPhone
On Jun 28, 2013, at 5:40 PM, "Ray Walters" wrote:
Richard, when you use your Fluke 87 to measure Vdc, black is negative,
red is positive. The black is labeled common because the
Energy Systems professional
Generac Generators Factory technician
On Jun 29, 2013 8:30 PM, "David Katz" wrote:
Watch out for accountants who become installers. They always thing red
negative and black positive.
David Katz
Sent from my iPhone
On Jun 28, 2013, at 5:40 PM, "Ray
I concur with both Mike and Richard here: keep the rails because it
should look better than all silver;
or if the customer insists, change the rails out, and get tough with
your supplier that duffed the order.
Either way you won't have some nightmare paint peeling in a year call back.
If the c
We'd need more info to figure this out.
1) Wire Size
2) Type of charge controller C 60 or new MPPT model
3) use a clamp on meter to measure actual current
4) measure voltage drop across the breaker.
This very well could just be a loose connection at the breaker either
the cable side of the brea
of before.
Another option I have not tried in cold weather, is diesels. I have
clients in warmer places with Kubotas that have offered excellent
service. I have clients in Alaska that love their diesels, but I'm not
sure what they've done to cold proof them.
Ray Walters
Remote So
Is this something else we need to put into our contracts?
"Not responsible for sounds due to normal thermal expansion and
contraction of racking, modules, and roof".....
Ray Walters
Remote Solar
On 10/20/2021 2:58 PM, Jason Szumlanski wrote:
These were Black framed Axitec panels.
mit, their
regular breakers are 150 vdc rated. I only use the 300 v rated breakers
with the new FM 100 that can take 300 vdc.
Ray Walters
Remote Solar
On 10/25/2021 6:45 PM, Chris Sparadeo wrote:
Hi Jeremy,
According to the QO cut sheet the answer is 48VDC:
https://download.schneider-electric
All else fails, I just would go back to the Trace retail, give it a 10%
for being used, and call it good. $165? no one will complain about
that
On 12/10/2021 6:42 PM, Jerry Shafer wrote:
Truely it depends, if someone is looking and needing that part, the
sky is the limit, its its just
The Midnite Classic can go higher to 72v stock, and they have models
that can work with 120 vdc batteries.
Ray
On 3/15/2022 12:19 PM, larrycrutcher wrote:
Hi William,
A charge controller may not be needed if you are running the pump
direct. By designing the PV array so that the Isc is higher
Most carts run at 48vdc these days. They either have eight 6 volt
batteries, or six 8 v batteries. I would think that would make a good
match for power backup with a 4kw range inverter like the Magnum MS4448.
Ray
On 3/15/2022 12:18 PM, Nick A Lucchese wrote:
Not sure what the golf cart flee
& melted beyond use, directly at the splice. The
> rubber linemen's tape was charred and there was a direct
> short to the metal box which was at least grounded
> correctly. I tend not to use Al based on this experience.
>
> Thanks, Dana Orzel
>
> Great Solar Works, Inc
&
I usually recommend retorqueing all connectors once the panel is mounted.
Whether its an E-panel or one we built at the shop, those washboard roads can
loosen stuff that would never have had a problem
otherwise. I'm actually surprised we haven't had more problems like this, even
with internal wi
Bob's idea of strapping them together is good. We do the same thing to move
batteries on horrible washboard roads, it definitely keeps them upright.
Also, consider the altitude change in flight, as that could pressurize an
unvented battery to dangerous levels. You definitely want to keep them ven
I'd say that at this point, with all the old solar systems, flat roofs, and
snow we get in New Mexico and Colorado, that if it hasn't been a problem, it
won't be a problem.
It definitely is not going to lift the panels; worst case is that it could
build up and get past flashings, which is a prob
http://www.tecratools.com/ is a decent company to work with.
I've been pretty happy with both of my tool cases I've gotten from them. I used
the tool back pack for years, and recently got a padded flight case with tool
pallets, meters are padded in the bottom.
R. Walters
r...@solarray.com
Solar
Backwoods sells the buck boost transformers for a reasonable price.
I have to add belatedly that as bomb proof as the venerable DRs were, they
indeed never charged well from cruddy generators. I had one once that made 0.5
amps at 12 volts DC.
The culprit as you already pointed out: Peak voltage w
We don't often get to take picture, as the point of failure is hard to find,
and the entire underground line is just abandoned and a new cable is installed.
Most failures I've seen (not actually seen) were on improperly installed runs,
done by DIYers.
On the other hand, the majority of undergroun
Interesting, there isn't a code requirement to color code for phase rotation,
but it is common practice for black, red, blue to correspond to clockwise
rotation. Also notice on the DC table, that John Wiles recommends (but isn't
NEC required) color coding for a positive grounded system:
white f
I found utter world wide confusion upon more research on this issue.
http://en.wikipedia.org/wiki/Three-phase_electric_power has a table that lists
color coding for different countries, US is black, red, blue, (common
practice),
while our neighbors in Canada, use Red, black, blue.☺ Europe is co
I think the issue is that some installers are wanting the supplementary
electrode for the array tied to the building grounding system in two places. I
saw this in BIll Brooks seminar too, but then he said it wasn't necessary.
Basically the EGC system already ties both electrodes together as requ
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