HI Allan;
We got some through Northern Tool and equipment.
http://www.northerntool.com/shop/tools/product_200317677_200317677
It's Generac, but it's UL listed, and cheap. (actually its made by
Nexus) As you can see the Cutler Hamer are over $1000.
I've also used their very low cost manual tra
y getting sick of it. Send me the pics
and I'll give you credit on my Horror Installs page.
Ray Walters
On 5/13/2011 1:08 PM, Jesse Dahl wrote:
All,
It was confirmed that this work was done by a local "contractor"
through photographs. Very poor workmanship. The best one of the j
Its not necessarily overkill with the well pump. The pump horsepower
pretty much dictates the system minimum requirements. What is the HP?
Overall, I like Magnum's stuff. You might be able to get by with the
MM1500 watt inverter (mod sine) Are you planning on using Midnite's
panel? I've been p
Fellow (soon to be former) Wrenches;
This is it boys; we're done for!
Ray Walters
Original Message
Check this out
http://thepersonalpowerplant.com/
They even show the shadow from the pole across the top module -- and the
modules on the bottom facing every which way,
n the early 60s in the
South. I am indeed the lucky recipient of your well justified
intolerance.
I will now go catch Home Brew Boy, and together we will eat a nice
heaping helping of steamed Crow.
Cheers to you Erika and all women in the technical fields, the solar
indu
built into
the positive terminal. Possibly the same device that controls charge
current to it too?
Dreaming up future BOS equipment,
Ray Walters
On 6/2/2011 7:44 PM, d...@foxfire-energy.com wrote:
What I like best about Mark's set up (the retired phone co. dude w/
half a hand), is tha
. However, if the cells / batteries are bolted
together and discharged right out of the gate, there's a good chance
SG & Voltages will be all over the map in short order.
Jamie
>>> Ray Walters 6/3/2011 2:53 PM >>>
I've set electric vehicle parallel strings u
We once cooked a T105 in an Electric vehicle situation, where the
terminal was loose and cause the lead around the bolt to melt. They're
just bolts set in lead. I removed the original bolt, and then drilled
and tapped into some solid lead to the side of the damage. I was able to
screw in a 1/4"
I would always expect the power monitoring at the inverter ( or in this
case at the module) to be higher, because of wire losses. Matt's case
is about a 4 to 5% difference though, so that only explains maybe half
the loss at most. I wonder if the inverter monitoring measures incoming
watts, or
s fly, and the installer can figure out" design may be the
current standard, but its not even close to being optimized.
Its unbelievable all these bright engineers on the manufacturing side
can't come up with something better.
Ray Walters
On 6/24/2011 7:47 PM, William Miller wrote:
Un
en torqued.
Ray Walters
On 7/8/2011 7:01 AM, Jason Szumlanski wrote:
I'm looking for a recommendation on a good torque wrench for
installing S-5 clamps. I saw the past posts on torque screwdrivers,
but I'm looking for a wrench calibrated to the 100-150 in-lbs range.
Jason Szu
HI Allan;
Here's a relay I've used for electric vehicles with up to 156 vdc nom.
batteries. (pushing 200 vdc charging on cold days)
http://store.kta-ev.com/openstylepowerrelaydpdtwithmagneticblowout.aspx
Click on the spec sheet for more details.
This is from KTA electric vehicles, a very reputa
it has taken some sever falls off the roof
to the ground.
Dana Orzel
Great Solar Works, Inc
*From:*re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] *On Behalf Of *Ray
Walters
Torque Wrenches
I've been using Sears's inch pound torque
says no. The most impedance is usually
found at the connection from the grounding electrode to the earth
itself, not at the array.
Ray Walters
On 7/13/2011 2:46 PM, Marv Dargatz wrote:
Drake,
This is a HUGE problem. If you want a real earful, talk to John
Wiles, Bill Brooks, or Greg Ball
heir class
B) a new requirement I wasn't aware of
C) a long standing requirement not being enforced
Fill me in oh wise ones,
Ray Walters
Solarray, Inc.
Denver, CO
___
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-w
"
This is either:
A) a scam trying to scare me into signing up for their class
B) a new requirement I wasn't aware of
C) a long standing requirement not being enforced
Fill me in oh wise ones,
Ray Walters
Solarray, Inc.
Denver, CO
Of course it is a good idea, just like NABCEP certification, but it
becomes a completely different animal when it is mandatory.
This all started when a company offering the training claimed an OSHA 10
certification was mandatory for solar installers.
Its becoming a full time job to keep up all my
I had a customer ram a vehicle into a pole mounted tracker at about 10
mph. It bent the tilt actuator pretty good, but the 6" pole and footing
were unscathed. Once I found a pole mount listing at a 10 degree angle,
turns out the DIYers hadn't set it in concrete.
Another situation we had 6" poles
Hi Marco;
Regular modules are designed to take quite an impact. I recall one
manufacturer that fired 1" ice balls with an air cannon at their
modules, and then let visitors throw baseballs at them. It seems the
foul balls would be at a lower velocity than a person co
Here's the ASTM standard for impact testing of modules, but it costs $34
to download: http://www.astm.org/Standards/E1038.htm
Ray
___
List sponsored by Home Power magazine
List Address: RE-wrenches@lists.re-wrenches.org
Options & settings:
http://
My mistake, I just found a spec sheet on the Unisolar 64, and it
specifically advertises "No glass" and "unbreakable". I worked on
systems with them before, but never sold them, so I assumed the
textured top surface was tempered glass all these years.
Many pardons,
then drive it into
the ice just to say you did.
Post some pics this winter when its in.
(P.S. optimum array angle will probably be as much as 80 deg due to the
ice reflection, and peak power could be over 125% of nameplate, use an
amp meter to adjust tilt)
Ray Walters
On 8/9/2011 7:09 AM, Exel
going to boat out to tell
everyone what to do? We have whole counties here in Colorado (and
Oklahoma) with no electrical inspection process, so why would the
inspectors come to an isolated island in a foreign country?
Bottom line: Keep the customer happy and everyone else should be happy.
Ray
Hi Mark;
In cases like that, I let the customer decide. My job is to present them
with two or three streamlined options and let them decide.
It seems it comes down to cost vs continued warranty (and possible
expandability?). Financial decisions ultimately need to be made by the
people paying t
ually wonder if slowing some subsidies might make for a saner
playing field.
Ray Walters
On 8/19/2011 12:33 PM, Exeltech wrote:
Making equipment more robust, yet constantly lower in cost, are
diametrically opposing goals.
Dan
___
List sponsore
ears, but those are indoors and not at full load every day.
Seems we need to do more to baby these Grid tie inverters (put them in
the shade, good air flow, surge arrestors, don't over load them, etc.)
Ray Walters
On 8/19/2011 11:18 PM, Exeltech wrote:
--- On *Fri, 8/19/11, Ray Walters //
e Li+ that are very good,
but also very expensive, and the military gets first dibs on most of those.
Ray Walters
On 8/21/2011 8:14 PM, Darryl Thayer wrote:
your numbers sound to good. My limited to one experiance is $15,000
for 10 kWh you are talking 33600 kWh for same money. The local
Michael Hackelman also wrote a great book on electric vehicles published
through Home Power Magazine.
That was back in the day when you could fit everyone that actually cared
about renewable energy technology into one room, and everybody was
friendly too.
Ray Walters
On 8/25/2011 1:35 PM
code) but my read is that
is no longer required by 2011 code as 690.47 D was deleted.
I love how some folks act like you're going to burn the place down if
you don't absolutely follow current code, and a couple of years later
the code completely changes its mind, again, and again.:)
from my experience) but take a look at Midnite Solar's new line of
lightning protection equipment.
Ray Walters
Solarray, Inc.
On 9/9/2011 12:32 PM, James Rudolph wrote:
Dear Wrenches,
Does anybody have any best practices for designing large PV arrays on
metal building in lightning
ooking at cycle life data, comparing costs,
adding in maintenance and replacement labor, etc..
L16s are serious losers on a $/ kwh operating cost comparison, so this
is a chance to up sell the customer to HUPs (or equivalent) and make
both of you happier in the long run.
Ray Walters
On
rt batteries is a terrible idea
no matter how much better the GC2 may be.
Larry
On Sep 16, 2011, at 10:01 AM, Ray Walters wrote:
The real point is that the Xantrex guy is correct from a scientific
stance. Experimental battery cycle life data shows that some golf
cart batteries (T105) do have m
rwarded from earth2
Begin forwarded message:
*From: *Ray Walters mailto:r...@solarray.com>>
*Date: *September 16, 2011 1:03:43 PM PDT
*To: *RE-wrenches <mailto:re-wrenches@lists.re-wrenches.org>>
*Subject: **Re: [RE-wrenches] battery cycle life, US Battery
**Reply-To: *RE-wrenches <
ndent test facility and publish some trust
worthy comparison data on a level playing field. I based my Rolls info
on almost a decade of literature collected from them, not just that one
chart.
Awaiting clarification from Rolls, sorry if I used the wrong data
Ray Walters
On 9/16/2011 10:57
have received pallet loads of 8D and 4D AGM's that were over 1 year
old when delivered.
Just for the fun of it, my opinion is that Johnson Control (JC) is the
worst performer. Just have a look at your JC Sam's Club $68 GC2. A 1-3
year battery. About the same for the JC Interstate gree
ke that to move the
big Surrette/Rolls batteries. Not nearly as big as a HUP but at 300+
lbs can be a little hefty.
Ron
On 2011-09-17, at 6:52 PM, Ray Walters wrote:
Todd;
I haven't tried the 2v L16s, because they were rated the same cycle
life. (I could be wrong?)
Are you really
ution to our knowledge base,
Ray Walters
On 9/20/2011 2:58 AM, James Surrette wrote:
Sorry, 2nd attempt.
Could not attach the presentation but have if anyone is interested
...
Morning Wrenches,
Regarding cycle life data, I thought some of you might find the
attached interesting
temp swings. It will basically maintain at roughly the avg temp for
the time of year, if not closer to the year round avg. If you're
interested, I can post a picture, it comes out looking pretty slick.
Ray Walters
On 9/22/2011 11:47 AM, toddc...@finestplanet.com wrote:
Have you considered
er
in 10 ft sections, and can drive as deep as 80 ft? (I always wanted to
try that system)
Did you tie to the rebar in the foundation or anything else interesting?
125 strikes a year is a lot, do you have a strike counter?
Always very interested in Lightning stories,
Ray Walters
On 9/22/2
More expensive, harder to find, and harder to cut, but you'll see the
difference in a couple of years for sure. Just a single washer that's
not SS will stand out like a sore thumb later.
Ray Walters
On 9/27/2011 11:40 AM, Jeff Clearwater wrote:
Hi Esteemed Wrenchies,
So for the proj
e, they have an excellent
waveform, (no funny spikes, like most portable units) so I can't imagine
why a Sunny Island wouldn't work well with it, but I never actually used
one with a Kohler.
Ray Walters
On 9/29/2011 9:53 AM, Jeff Clearwater wrote:
Fellow Wrenchers,
What's folk
re you sure you still need this? I believe 2011 only
requires you bond all the metal to the EGC, as always.
Ray Walters
On 9/30/2011 8:24 AM, Kent Osterberg wrote:
The requirements listed in 250.52(3) were changed in 2011. The rebar
used is allowed to be near the bottom of the footing or in verti
unted PV array is
considered a structure and requires a ground electrode per 250.32.
Perhaps the exception would cover the possibility a installing very
small system without a ground electrode.
Kent Osterberg
Blue Mountain Solar, Inc.
Ray Walters wrote:
I've also used 250.52A(7) defini
both the Classic and
apparently the XW can do better than that. Adding losses for converting
DC to AC to DC again, and I can't see any compelling reason to go AC at
the array.
Ray Walters
On 10/2/2011 10:50 AM, Dan Fink wrote:
Hi Eric;
I'll be very interested to hear what others o
Windy Dankoff had an electric forklift at his old Santa Fe shop, that
they charged with a Trace SW4024, I believe.
Ray Walters
On 10/2/2011 10:08 AM, Peter Parrish wrote:
We are looking for a battery-powered fork lift: total vertical lift
22' and load (typically on pallets) 350 to 70
I started using the wet rated wire nuts, because I've found some
corrosion in old connectors in outdoor boxes. BTW, why don't you
like the goo filled wire nuts? They seem a decent and cost effective
solution.
I agree with your idea that condensation and moisture buildup
I've seen behavior like that from Series 5000 Rolls that were only a
year old, but chronically under charged. (20 amp load and the inverter
would reach low shut off in minutes, 30 amp charge and it hit high
voltage and quit charging) Any other battery, and I would assume its
capacity was gone.
ler
conductors, but specifies PV system conductors, so I'm not sure if that
could be applied to the EGC. H.
You might also be able to use pieces of heat shrink on bare Cu just
where it crosses other metals.
This is yet another reason why WEEBs are a god send.
Ray Walters
On 10/31
Perhaps it was some of the contagious mentality around at the time that
also killed GM's electric vehicle in favor of the Hummer..Solar
worked, they feared the end of the oil era, so they had to kill it
before the rest of the country found out.
Not all bad, as some of those old Trilams and Q
When they start and shut off in 30 secs, its definitely a control issue,
like the others said. I had one that just needed the radiator topped off
to cure the same problem. That's definitely one of the good ones though;
nothing like it that I know of today.
Ray
On 10/31/2011 8:39 PM, jay peltz
mplicated it becomes.
Ray Walters
On 11/3/2011 11:39 AM, Joel Davidson wrote:
See-thru solar cells have been around for decades. Arco Solar made 4%
efficient amorphous silicon modules and car sunroofs in 1984 that were
tinted brown like sunglasses. I got a 12-inch square see-thru laminate
that stil
ake a voltage regulator that
will stabilize a battery voltage, as well as up and down DC to DC
converters.
Also, I'm up in Denver, and don't mind driving (buy my gas) if you ever
need any help.
Ray Walters
On 11/3/2011 4:26 PM, All Solar, Inc. wrote:
Hello,
I have a client runnin
250 can handle a maximum
of 1722 watts. Personally I've found controllers seem to last longer
when over sized, rather than over loaded.
Ray Walters
Solarray, Inc.
On 11/4/2011 5:22 PM, Carl Emerson wrote:
Hi John,
Yes I have seen this one thanks.
I should have mentioned that the arra
lly if its a
long shared ditch).
Ray Walters
On 11/6/2011 8:36 AM, Drake wrote:
Check out Figure Figure B.310.15(B)(2)(1)
At 07:43 AM 11/4/2011, you wrote:
Separation is an issue the NEC does not address clearly .However,
please make sure you allow adequate room to repair the conduit if
da
Today's controllers are so much better both in terms of battery
management, and power efficiency, that I replace the old Pulse stuff
even if they're not dead. I usually keep the PC250 as a DC load center,
and pop a new controller off the top. This is often a good time to add a
few modules to th
Just curious, what's the advantage of switching at the array vs. just
using a Sunny Island or Outback system? Seems this would cost more, and
have less efficiency, since you would still have the battery float
losses, backup inverter idle losses, in addition to the 2nd grid tie
inverter losses.
th an externally mounted Outback
MX60, but I did not rewire the array.
Best regards,
Joel Davidson
- Original Message - From: "Ray Walters"
To: "RE-wrenches"
Sent: Monday, November 07, 2011 10:16 AM
Subject: Re: [RE-wrenches] Faulty PM-60 circuit board
Today&
He doesn't want battery backup?
Ray
On 11/9/2011 10:33 AM, Joel Davidson wrote:
Wrenches,
After telling my customer to upgrade to an MPPT charge controller
(thanks Ray Walters and John Blittersdorf), he decided to really
optimize his PV array and retire his Trace SW4048 inverter. He h
It seems that if the strands were stretched and therefore thinned, that
that would increase resistance, some. I think more importantly, the
insulation bunchs up and cracks, and is definitely compromised. Also
with strain hardening of copper, I'm sure some strands could break
internally with a
wire will only
encourage low voltage shut downs (<211 @ inverter).
Ray Walters
On 11/16/2011 10:49 PM, William Miller wrote:
Luke:
Maximum inverter output will occur rarely. Most of the time the
inverter(s) will be running at lesser output amps. One approach is to
size wiring for a cer
We redid one in a very similar situation recently. In that case the
customer wanted super backup and so we put in Grid tie Outbacks and a
new battery bank, added modules, and kept the SWs as battery chargers
from the generator. He had the option with bypass switches to use the
SWs, if the Outba
roblems.
Darryl
*From:* Ray Walters mailto:r...@solarray.com>>
*To:* RE-wrenches mailto:re-wrenches@lists.re-wrenches.org>>
*Sent:* Wednesday, November 16, 2011 12:11 PM
*Subject:* Re: [RE-wrenches] 90 degree wire bends
It seems that if the strands were stretched
Hi Jeff;
The new combiner boxes from Midnite are interesting for this application
too, as they offer a single external disconnect built into the side of
each combiner box. They can later be easily upgraded with Midnite's new
arc fault protection and remote disconnect. One simple signal switch
r, and spread by word of mouth, the good news to their off
grid neighbors.
This type of work is not for the squimish though, and I have had my
share of 4 am worry sessions over some of this work.
Also bill by Time and materials, you never know what you're going to run
into, till you get everyth
The wrong crimping tool with the wrong crimp is a big no no. I've seen
complete melt downs at high amps, because there was not enough contact
between the wire and the connector.
I'm one of the guys here that will help you save money when it makes
sense, but I've personally seen a lot of improper
I'm prepping for a class on this very subject tonight, so I'll just wrap
up everybody's good points:
V min = Vmpp x (1- temp diff x Temp coefficient)
So first, I'd take your ambient temp from ASHRAE Extreme Annual Mean
Maximum, then add Scott's adder (ie roof mount off 6" = +30C) so let's
say
n Nov 29, 2011, at 5:55 PM, Ray Walters wrote:
I'm prepping for a class on this very subject tonight, so I'll just
wrap up everybody's good points:
V min = Vmpp x (1- temp diff x Temp coefficient)
So first, I'd take your ambient temp from ASHRAE Extreme Annual Mean
Maximu
I pulled the Al off, and recycled the framing with our cans ( Al scrap
is over 50 cents/lb). The glass/ silicon I took to a computer/
electronics recycling drop off. Did I do the right thing? Never know,
but shipping them seems more environmentally damaging than the land
fill. Many places re
That's more detailed info, but I still am wondering what ambient temp to
apply (which AHSRAE #) with the temp adder. Daryl suggested using a 2%
high temp. Also, where are you all getting your weather data? I found
the NEC suggested ASHRAE manual to be close to $200. That's a bit much
just t
ches-boun...@lists.re-wrenches.org] *On Behalf Of *Ray
Walters
*Sent:* Thursday, December 01, 2011 3:58 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] calculating low string voltage
Fantastic Info everyone, I think I've got a full grasp on this topic
now, from using the correct coefficient to the
You can always add a boost transformer from Backwoods Solar, to boost
the VAC slightly (10%) to increase charge amps.
If you look at your peak voltage on that genny, its probably below 145
(should be 170 v peak for 120 v rms )
Ray
On 12/2/2011 8:46 AM, jay peltz wrote:
Hi Howie,
They were m
Midnite Solar has powder coated aluminum enclosures that also have the
AFI option that can be added when available later. There also alot
cheaper than some of the other solutions out there.
Ray
On 12/7/2011 6:57 PM, Dave Click wrote:
Marco, the easiest solution may be to just replace it with
.
300.6 Has a lot of good info on corrosion that we in the solar biz
should be all over, as well.
So that's 3 pretty specific code references.
Ray Walters
On 12/13/2011 7:03 PM, b...@midnitesolar.com wrote:
On 12/13/2011 5:47 PM, Dan Fink wrote:
Esteemed Wrenches;
An email question fr
Some hardware stores carry a high strength double stick foam tape. I've
used a permanent outdoor rated type (3M?)
that won't come off. Just don't let the kids play with it.
This looks like the stuff I used:
http://www.uline.com/Product/Detail/S-10152/3M-VHB-Tapes/3M-5925-VHB-Double-Sided-Fo
Did you look for dead cells? I've seen many L 16 sets (including my
own) only last 4-1/2 years, so that set was already almost done. If she
started mixing new batteries in before, she knew she already had a
problem. Did this system change from 12 v to 24 v? The rule of thumb
for eons (or
The sulfated cell would show an artificially high SQ reading, if she
tried to add acid to it: another bogus trick people try, when their
batteries are going out. You might ask. Customers often have to try
every other trick in the book before admitting they need to pay for new
batteries. (a
I use language like: "you may be eligible; it depends on
interpretation; some people have taken the credit in this case; its not
my business what you claim on your taxes," all followed by Allan's
"check with your accountant, I'm not a licensed CPA"
I feel that its fine to mention the
Hi All;
I know AC coupled systems have been covered before, but I have a new
issue: positive grounding. A customer with an existing 8kw Sunpower
system wants to add backup. He was put off by the high cost the Sunny
Island, so I was steering him towards a single Outback VFX coupled to
just
trician
Solar Design Engineer
303 505-8760
On 7/30/2013 2:59 PM, Ray Walters wrote:
Hi All;
I know AC coupled systems have been covered before, but I have a new
issue: positive grounding. A customer with an existing 8kw Sunpower
system wants to add backup. He was put off by the high cost the
Su
505-8760
On 7/30/2013 5:29 PM, Jay Peltz wrote:
Hi ray
Magnum does have a way to do it
Theirs is a bit different, but all the data is on their web site
Jay
Peltz power
Sent from my iPhone
On Jul 30, 2013, at 4:23 PM, Ray Walters wrote:
The Outback rep got me some good info, and I'm likin
tor
ke...@whidbeysunwind.com <mailto:ke...@whidbeysunwind.com>
PH & FAX: 360.678.7131
On Jul 30, 2013, at 4:23 PM, Ray Walters <mailto:r...@solarray.com>> wrote:
The Outback rep got me some good info, and I'm liking the Radian with
the Remote controlled breaker to
Corey;
Would you mind sharing what relay didn't work, and which ones did, along
with inverter output current? Since the relays will be running for
hours at inverter rated output, my thinking would be to oversize the
relay by at least a factor of three. I might try Outback's relay/
breaker
Looks like SnapNRack. Get some new bolt and clamp sets before you start
loosening anything. The SS bolts can spall, and the last one we worked
on, we had to replace 1/3 of the hardware. We used anti-seize thread
lubricant and a torque wrench on reinstallation. SnapN Rack seems
pretty decent
Mac;
Is this off grid? The Intimidator is not a high cycle life battery.
I've had trouble finding exact ratings, but its probably in the 250 to
300 cycles at 80% DOD. I'd expect 3 years max in an off grid
application. Also the Intimidators I've seen are actually AGM, not
Gel, but I don'
wice!
On Sat, Aug 3, 2013 at 6:42 PM, Ray Walters <mailto:r...@solarray.com>> wrote:
Mac;
Is this off grid? The Intimidator is not a high cycle life
battery. I've had trouble finding exact ratings, but its probably
in the 250 to 300 cycles at 80% DOD. I'
Just to add to the discussion: Maui Electric (MECO) has had the same
policy of denying all battery based systems. My understanding is they
won't even allow simple battery backup systems (no grid tie, so sell back).
PNM (in Alan's backyard) used to require a very expensive and
unnecessary load
These cheapo inverters are nothing new; we've had to sell against them
for over a decade.
Its all about longevity, and how bad life might be with a several week
outage.
Weight is a great, simple place to start. The quality inverters are
transformer based, and weigh much more.
Which one is goin
We use a high lift jack to lift the case up onto a carrier we've made.
Roll them right into the room. We then use the high lift to push them
exactly into place, with a wood brace against the wall. I'm still a HUP
fan fro the cycle life (2100 cycle to 80% DOD) but if the 1500 cycle
batteries are
Hi William;
One thing to consider is that you want to cycle the batteries at least
20% DOD. If you look at the cycle charts for regular Lead acid
batteries, the total KWH you can get from a battery for its lifetime is
fairly equal from around 20% DOD to 80% DOD. (basically you can get
twice
I find its also about the money. If they're expecting a $20k system to
perform like a $100k one, then yes, move on. I agree with Daryl that
you keep a good record by picking your clients.
On the other hand, I have some fairly wealthy customers that don't want
to reduce their loads, and are wil
Hi Kevin;
Which watering system did you find that worked? We've been through a
bunch that were worse than no watering system at all.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 8/16/2013 5:38 PM, Kevin Pegg
-shift-away-from-green-illusions
my .o2
todd
On Friday, August 16, 2013 5:26pm, "Ray Walters" said:
> I find its also about the money. If they're expecting a $20k system to
> perform like a $100k one, then yes, move on. I agree with Daryl that
> you keep a good record
My all time favorite is "the Solar Electric Independent Home Book" by
New England Solar. Its dated at this point, but does the best job I've
seen of conveying the overall design philosophy and life style. Very
simple easy read.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
I have a couple of Outback questions. On my load analysis sheet, I
include 20 w x 24hr/ day for the inverter's no load draw.
In the past I had very poor luck with the search mode on most inverters,
and found that when I adjusted it so that it came on with efficient
lighting, that the no load dr
Full River has better cycle life specs for a sealed battery. We've
gotten good feed back from the field so far.
B&B is another that I've abused and had good luck with. Their cycle
life is lower, but comparable to the Hawker or MK.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer
On module IV curves, 100 w/m2 is the lowest insolation level usually
listed. It would also depend on the charge controller or inverter being
used. I've seen arrays make power at below 100 w/ m2 if there is enough
array to overcome the operating losses of the electronics.
R.Ray Walters
CTO,
What supplier are folks using for the Ecogen?
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 9/15/2013 9:19 AM, Dave Palumbo wrote:
Ecogen it is. Thanks everybody.
Dave Plaumbo
*From:*re-wrenches-boun...@lists
Looks interesting, I've been waiting for Li+ to start making sense on
larger scales.
The cycle life does not appear to be better than a HUP lead acid
battery, despite the claims of "10 times the cycle life of an AGM
battery" I'm confused because in their white paper they also claim: 200
cycle
HUP warranty covers shipping and install labor for the first year, but I
can't personally vouch for it as I've never had a warranty issue.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 9/20/2013 6:01 AM, Howie M
Hi Wrenches;
This might be slightly off topic for a solar list, but I'm doing some
flood damage work for my sister in Boulder, who's basement was
completely filled with water last week. We stripped all the sheet rock
and carpets, etc. out, and then had a company come in to dry out the
lumbe
1 - 100 of 983 matches
Mail list logo
