m:* re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org]*On Behalf Of
*Ray Walters
*Sent:* September 19, 2013 9:51 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Li-I question
Looks interesting, I've been waiting for Li+ to
Hi Marco;
Article 200.7 specifically prohibits using white wire for anything but
grounded conductors. This came up last year on a large project with an
ungrounded array, that also had white incorrectly specified in the
plans. The appropriate colors would be red for positive, and black for
n
All Cable and probably other companies can add striping and marking to
any wire you need.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 9/23/2013 10:57 PM, d...@energysolarnow.com wrote:
Marco- You should not tr
ng the conductor polarity with tape, wouldn't
that fall foul of the NEC rule that only allows wire colouring on
conductors larger than #6?
On Tue, Sep 24, 2013 at 2:17 AM, Ray Walters <mailto:r...@solarray.com>> wrote:
All Cable and probably other companies can add striping
I just did one with 32 tooth/ in. jig saw, then filed it to clean the
edges. Came out decent, but took about 20 minutes.
I would tape over as well to avoid scratches.
I know they make punches, but they're stupid expensive, and easy to
break the corners off.
R.Ray Walters
CTO, Solarray, Inc
Na
We did a charging station for a Chevy Volt earlier this year. We
actually ran the charger for about a week to come up with the design,
based on their mileage ,etc. This also accounted for battery and
inverter losses. We added about a 3400 w array (off grid) and they
drove about 40 miles round
On Sep 15, 2013, at 8:56 PM, Ray Walters <mailto:r...@solarray.com>> wrote:
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
:05pm, "Ray Walters"
said:
We did a charging station for a Chevy Volt earlier this year. We
actually ran the charger for about a week to come up with the design,
based on their mileage ,etc. This also accounted for battery and
inverter losses. We added about a 3400 w array (off
If its a Rinai, I measured one once that was 30 watts AC standby, and
jumped a bit higher when firing. It also needed pure sine.
The customer swapped it for a regular hot water tank.
Some Bosches and old Palomas, etc. had either a piezo ignition or pilot,
but took no power.
I'm working on a sy
3rd option would be to have a separate charger (IOTA) that just runs
from the generator. No pass through loads to the generator.
4th option would be to use a larger Kohler for backup. My experience is
that even if they don't think they'll need it, they eventually will
actually use it. Large
Sounds like they need a 20 Kw Kohler. Hot Tub in the future? They'll
love their Kohler. The Generac is just way too small to even consider IMHO.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 10/1/2013 8:11 AM,
4-1112 office 780-2738 cell*
_www.positiveenergysolar.com_ <http://www.positiveenergysolar.com/>
On 10/1/2013 9:16 AM, Ray Walters wrote:
Sounds like they need a 20 Kw Kohler. Hot Tub in the future? They'll
love their Kohler. The Generac is just way too small to even
consider IMHO.
R.Ray Walters
CTO, Solar
models for off grid use, 14RESA/L, 8.5RES and the 6VSG,
which have an 18 month warranty. Do you know anything otherwise?
Larry
On Oct 1, 2013, at 8:16 AM, Ray Walters wrote:
Sounds like they need a 20 Kw Kohler. Hot Tub in the future? They'll love
their Kohler. The Generac is just w
That's too many separate poles, they get to be a real hassle at more
than two (and costly too). I'd go to a multipole mount arrangement,
(here's
one:http://www.dpwsolar.com/index.php/applications/commercial/9-commercial/17-multi-pole-mounts-g2-mpm-g2
and then all your cabling won't have to jum
How is TEK 90 referenced in the NEC? Does it meet the qualifications to
be used inside an attic for instance?
Finally the onestopbuy link was very light on info; are the cables
inside stranded or solid?
Thanks,
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master El
HI William;
I think you might have a problem. Looking at Enphase's ratings, the
M190 has an output rating of 800mA, while the M250 has an output rating
of 1.0 A. 10 M250s = 10 amps, 9 M190s = 7.2 amps
17.2 amps exceeds 80% of your 20 amp breaker.
I know this won't actually happen, but my und
I just ran into this on a new Dasol 12 v module. I ended up wiring with
USE but couldn't do the series connections. I had to bring each module
wire into a J Box. I'm now using Kyocera, as that was a PITA. Since
your project is low amperage, have you considered smaller USE like 12 or
14 GA?
Just to add to Phil's comments: I've been calculating total life cost
of battery storage (KWH x cycle life x %DOD) and the costs are 15 to
35 cents/ KWH to cycle a battery. Its even higher for sealed batteries
and Li+. It would have to be an amazing cost difference in the TOU
rates to beat
Not familiar with a Whisper, but here's troubleshooting guide for Bergey
with a short. Does it have a rectifier? That could be burned out.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 10/14/2013 8:55 PM, All
While the problems seem related, I'm guessing the gen set issue is a low
coolant or low oil condition. The generator has sensors that shut it
down if they don't see fluid (coolant, or oil) after a few seconds. The
symptoms fit that.
For the inverter, it is either fried or has some programming
/I issue this pre disclaimer, as I don't have references to back all my
following statements up. Bill B. is very right about references./
My "Understanding" is that if a UL listed wire, cable, or device has a
voltage rating and that volt rating just says 600 V, then it applies to
both AC and D
Hi Jesse;
Midnite's breaker boxes would solve your disconnect issue, but I
wouldn't use the baby box or Quad box, they're small and tight. I'd
actually consider their 6 position combiner box, even though its outdoor
rated. Another option would be the Mini DC box.
Here's my quick, real man's
Larry's advise is good for us pros, but I find many customers get mixed
up and have a harder time properly programming today's MPPT
controllers. If the programming gets messed up, much worse things can
happen, and its hard to troubleshoot over the phone.
I just advise they turn some of the sub
I just looked into it. Yes there are other options, but none are even
close to the price point of the Iota. They are also super simple to
setup, get the new IQ4 option.
The only downside to the Iota, is they aren't that conducive to a NEC
install; you got to live with some exposed cabling, un
We just did one, and I used some fairly
short Timberlok type lags (thinner and stronger) I wasn't super
excited about only having an inch of wood to grab, but the edge
wood is stronger and denser than regular 2x material it seemed.
I predrilled the holes, and g
We've made up mounting brackets with
unistrut for this purpose as well. We just bend their regular 45
deg angle brackets to match the roof tilt. It's a bit of work
though, so we are going to other solutions like the Soladek, or
just putting the combiner box in a
I've always found much of BIPV using
amorphous technology to be somewhat less safe. Ever see the
Unisolar BIPV setup, with all the parallel connections made loose
in the attic? Yuk.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master
Where are you buying them from? I am so ready to move away from plastic
zip ties. 59 cents is quite a bit, but that's actually doable. Last
time I looked at SS ties, they were a couple bucks each.
Thanks,
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electr
I'm ordering the Jason's PV wire clips. Vinyl coated metal will outlast
any plastic sip, and they clip into the slot on the rails: much cleaner
than a zip tie all the way around the rail. It doesn't cure all our
wire management issues, but it looks like it will solve some of it. In
combinati
I definitely think cable tray is a good compromise between conduit and
loose zip tie wiring; I primarily question rodent protection.
Even cable trays can go horribly wrong: I've seen them not supported
properly and bend or even fall over spilling cables onto the roof or ground.
R.Ray Walters
C
I thought the relays on the SWs were sealed, so visible arcing sounds
bad. Are you sure its not a loose connection?
Also on the batteries, anytime I've ever seen someone replace just a
couple of cells in a bank that old, it never ended well. It was like
that gopher stomping game, and you hit o
nergysolar.com_ <http://www.positiveenergysolar.com/>
On 11/18/2013 6:13 PM, Ray Walters wrote:
I thought the relays on the SWs were sealed, so visible arcing sounds
bad. Are you sure its not a loose connection?
Also on the batteries, anytime I've ever seen someone replace just a
coup
My take on 250.110, is that you could run separate EGCs from either end
to bond the metal J boxes, and not have the EGC run the entire length
through the PVC.
Option 2: attach a Bobcat to one end of the PVC and rip it out of the
ground, then use the freshly made trench to reinstall what the
in
PDF was pretty decent for searching and copying quotes. Never tried the
E book.
My electrical supply house had a great deal on the book before with a
free download of the PDF version. I'm about to ging hunting up the best
deal on the 2014 Handbook. Any leads?
R.Ray Walters
CTO, Solarray, In
Leave it to Windy to be about a generation ahead of the rest of us on
all things RE once again. Cheers to Windy:-)
I still own a Battery Weld 2000 from the 90s, which is a MIG machine
that runs on 24 v dc. The limit is the battery. It can blast at over
200 amps, if you have enough battery t
First, Outback does have a solution: the Flexnet and Mate 3 stuff;
Outback's stuff is pricey though. They're also a mess to wire IMHO.
Here's 2 others to consider: Pentametric from Bogart Engineering, and
Midnite Solar.
Midnite Solar's monitoring is free when you buy their controllers. They
al
rends
(battery voltage, SOC, battery currents etc) over time? I like to show
people that they are using more power than they think.
Thanks
On Thu, Dec 5, 2013 at 6:30 PM, Ray Walters <mailto:r...@solarray.com>> wrote:
First, Outback does have a solution: the Flexnet and Mate 3 stuff;
7; FYI.
I kinda like your name, "Gizmo Jr."... Might have to use that one some
day for
another product.
boB
On 12/5/2013 5:30 PM, Ray Walters wrote:
First, Outback does have a solution: the Flexnet and Mate 3 stuff;
Outback's stuff is pricey though. They're also a mess to
Hi William;
My now apparently orphaned copy of Maui Solar Software has Pacific
Chloride Brand batteries listed in its data base that are industrial
flooded lead acid batteries. They have very similar performance
parameters as other fork lift batteries like the HUP. I don't have cycle
life i
I've found that instead of insulting them, I just let them talk about it
for a while. Then usually they mention what a pain it is, and how
unreliable, and then I gently point to the various potential fire
hazards, and that even though 12 vdc can't electrocute you, it sure can
start fires
I
Hi;
I was just doing some cost comparisons of different batteries for a
customer. I found that on Rolls website, they've apparently upgrade
their cycle life of the S5000 series to 2100 cycles (or more) at 80%
DOD. It has been 1500 cycles at 80% DOD for quite a while, so:
Question 1, what new
ons/renewable-energy-systems
On Dec 18, 2013, at 2:28 PM, Ray Walters wrote:
Hi;
I was just doing some cost comparisons of different batteries for a customer.
I found that on Rolls website, they've apparently upgrade their cycle life of
the S5000 series to 2100 cycles (or more) at 80% DOD.
You can waste lots of time trying to save an already dieing set of
batteries, or just cut to the chase and install a new set. L16s are not
a long life battery. While some folks can baby them and get 10 years,
I've seen failures at less than 5 years. Compare cycle life; most L16s
are only 600
I agree with Allan and Dan, and would also add that modeling the
performance in some type of software would also be important.
Both PV Design Pro (now apparently obsolete) and HOMER allow you to set
on and off set points based on SOC. You can literally see how the
battery is cycled to predict i
I'll chime back in on a few points:
To MPPT or not: It all gets down to the budget: I find the tipping
point to be around 250 to 400 watts. My small systems usually don't
have MPPT, and as soon as I get into more than a pair of modules, I'm
using the cheaper 60 cell modules with MPPT.
I like
Products makes a 25A MPPT with a built-in digital voltmeter. Perhaps it could be a
two-in-one option for Eric?
Stay warm.
Happy New Year to you and yours
Dan
------------
On Tue, 12/31/13, Ray Walters wrote:
Subject: Re: [RE-wrenches] Higher LVR to fo
I finally found a cycle life chart on these: they're rated at 1200
cycles to 80% DOD, and about 2000 cycles @40% DOD.
In an "average" off grid system at 12 years old, I'd say they're near
the end of their life. In a back up setup, who knows.
I've tested systems like this before, I basically turn
Hi William;
I haven't seen any standard really. I noticed that HUPs switched
from 5/16" hardware to 1/4". I'm old school like you, and prefer
5/16" hardware, however I think if you look at the lbs of
compression that the 1/4" bolt can provide, it's still
Bergey is the only reliable choice I'm
aware of right now. They have the XL.1 1000 watt, and I believe
it jumps to the 10 kw unit.
The 1 Kw units are now using Midnite Controllers, which is
definitely an improvement.
I can't advise on adapting to the tower
Also consider the large industrial batteries such as the Trojan
Industrial 2 v models, HUPs, IBE, etc.
They have longer cycle life, and therefore are a better deal in the long
run. Batteries are the weak link in off grid systems, so you want to
really make sure you're getting the right battery,
On these small projects, its very important to nail down the exact load,
to keep the pricing sane. I list on the estimate what the system is
designed to do; for instance 18 w load 24 hrs/ day. Then if something
goes wrong and they are running more than they should you just gently
point out tha
rea lighting to the system. It won't
use much power.."
Dan Fink
On Tue, Jan 21, 2014 at 10:22 AM, Ray Walters <mailto:r...@solarray.com>> wrote:
On these small projects, its very important to nail down the exact
load, to keep the pricing sane. I list on the es
Kevin is right on about this too. I just passed on a project, where the
customer insisted they needed a 3 Kw array, but wouldn't share the load
calculations (and they expected a 5 yr warranty!) I knew if we were
having trouble communicating now, it would only get ugly when they were
sitting i
Hi Brian;
Invoking 90.4 is a decent idea; the only problem is those smarty pants
over at Midnite have been working on their Birdhouse disconnect system
for several years already in anticipation of this requirement. I'm not
up on all of this (still waiting for my copy of the 2014 Handbook) bu
I must jump on my soap box, as I have so many time in the past, and
follow up Glenn's comment here. We worry so much about details of PV
arrays, while batteries are serious safety hazards that no one
(including the NEC) ever wants to address. Not only can they not be
de-energized, they have a
I'm definitely interested in being involved too. I really respect how
difficult the language crafting can be, and the frustration to have
certain intent be misconstrued by an AHJ some where else later.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
I've heard that the entire array can build a surface static charge,
though I don't recall getting zapped by the array. Seems like better
grounding would take care of that. I get popped touching ungrounded
metal like my truck. It can be very alarming, much more voltage than you
might expect.
I
No suggestions on modules, but possibly you could swap all the good
modules onto 2 poles, and modify the 3rd rack to hold a set of all newer
modules?
I just sold a customer a bunch of Solar World 270s, to replace dead
Astro Power modules on Wattsun racks.
They went for a total square footage tha
I'd 2nd Hilton's comments. Energy efficiency can reduce heating loads
to almost nothing. The German standard "passive solar" design uses
almost R100 insulation, triple pane Lo E windows, doors with multiple
seals, and are so tight they require an air to air heat exchanger to
insure fresh air.
Good point, Jason.
I like Snap N Rack's products, but when I tried to order equipment (no
distributors carry their stuff in Colorado) they never returned my
calls or emails. I'd certainly be wary of their future support, if they
won't even return calls for sales.
Frankly I'm going to start
I can give you one example for them to consider: UPS systems. They all
use sealed VRLA batteries, and are not vented to the outside.
2nd thing for them to chew on: The Midnite Battery boxes are ETL
listed, and you are installing them to the manufacturer's recommendations.
3rd, your use of arti
We use Anti- Seize Lubricant made by Permalex. I get it at the auto
parts store. I have an 8 oz. bottle with built in brush on applicator.
Definitely recommended on all SS hardware. I took apart another
installer5's rack to add modules, and half the bolts were ruined and had
to be replaced.
I
1 PM, Chris Mason
mailto:cometenergysyst...@gmail.com>>
wrote:
Probably Permatex.
On Thu, Feb 6, 2014 at 4:55 PM, Ray Walters mailto:r...@solarray.com>> wrote:
We use Anti- Seize Lubricant made by Permalex. I get it at
the auto parts store. I have an 8 oz. bottle w
I started using automotive SAE rated resettable circuit breakers like these:
http://www.delcity.net/store/Hi!Amp-Surface-Mount-!-%3Cbr%3EManual-Reset-%28Switchable%29/p_193073
I'm only using these on smaller stand alone (non NEC) off grid systems,
but they are sealed, and allow protection right a
I'm working on something similar. I think the Flex 1000 is the only
reasonable choice that can handle more than 2 of the large format DC
breakers. Midnite has the more expensive MNBCB -1000 Battery Combiner
box, but there just isn't enough documentation to figure out what it
can and can't do
Yes, they make a 3 pole class T fused disconnect. You could have 3
strings fused separately and then combined in a single pull disco, UL
listed too. I even have one here, or I can provide their contact info.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electr
pick bulletins 129, 130, and 130 A those
are the sizes most of us will be interested in.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 2/9/2014 2:26 PM, Ray Walters wrote:
Here's the spec sheet on the 400 am
Boltswitch used to make pullout discos for the smaller R fuses too. You
can use them, but they are a time delay fuse, so you need to look at
trip curves for sizing (don't just substitute the same amp rated RK5 for
a T)
The R fuses are physically much larger, and are rated to 300 vdc, class
T t
I just had an idea on this situation from August's comment. I'm sure
you've checked already, but are you sure that ground and neutral aren't
bonded in both locations, causing current to flow through the ground
system? I've seen many multiple building properties inadvertently send
both a ground
The Midnite Classic can be set with the onboard screen, and the Classic
Lite can be set with dip switches, but I actually prefer to pull both up
on the router in Windows. The software finds any Classics connected in a
few seconds, and its much easier to navigate and check all the settings
in a
1000 cycles at 80% DOD for a small format sealed battery is impressive.
It all gets down to what they cost, and if they really live up to those
numbers in the real world. It also looks like they only have a group 31
sized 12 volt model, so that limits their use to smaller GTB
installations mo
Alot of these generator setups need 2 regulators, so usually the regular
one stays at the tank, size the pipe for the flow rate ( just like wire
and amps;-) .) and put the 2nd regulator right at the generator.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master E
:
to further complicate things, i have seen "regulator oscillation"
problems with 2 in series.
todd
On Monday, February 17, 2014 2:30pm, "Ray Walters"
said:
Alot of these generator setups need 2 regulators, so usually the
regular one stays at the tank, size the pi
Volatile memory was a pet peeve of mine with the Trace SW inverters. I
quit even trying to program them, because they would always end up
getting reset anyway. However, I've tested this feature on the Midnite
Classics and I could not get them to drop programming. I used the
computer app, set
We've done some research on this, as we're doing an XL.1 project at 12 v
right now.
I don't have first hand experience with the Clipper yet, but I have over
a decade of XL.1 experience and many years with Midnite's electronics.
The Clipper is exactly what is needed. It also moves the rectifier
f it, just
have no experience with it yet.
Jeremy Rodriguez,
President
All Solar, Inc.
1463 M
Penrose Colorado 81240
719-372-3808 office
719-372-3804 fax
www.asolarelectric.com <http://www.asolarelectric.com>
Sent by Jeremy's iPhone. Sorry for typos and shorthand!
On Feb 19
I agree that middle point is tough. I actually still use PWM for small
stuff, when I can find reasonably priced 12 v modules. I use the Blue
Sky 30 amp PWM.
I'm testing a Midnite Kid right now that will probably fit the bill.
Also they're new Whizbang Jr can work with all their controllers an
Here's a supplier of mine in the Electric Vehicle world where Li+ is
becoming the go to battery choice because of the higher energy density.
http://www.thunderstruck-ev.com/batteries-ev/lithium-ion-ev.html
I'm still talking customers out of Li+ for solar, because of the cost
and charging issues
Larry;
You mentioned you tested CALB batteries; what was your experience with
them?
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 2/27/2014 4:44 PM, Larry Crutcher, Starlight Solar Power Systems wrote:
Jay,
What is the length of the conduit to
the subpanel? That will determine whether to apply the derates.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 3/4/2014 1:34 PM, Kirk Herander wrote:
New Mexico used to have a low voltage electrician. It was for
communications guys, and was limited to under 50 v.
Actually pretty useless, since most systems had inverters. Also it
wasn't that much harder to just get a regular electrical license.
Also, some considered even 24 v systems to be ov
I've got one customer that has one, they're pricey, but seem well made.
They had quite a few problems and are going to a regular AC generator
setup and decent inverter/ charger.
The off grid solar biz has tried DC gen sets several times, and it has
never worked out. The theoretical gain in ef
Consider the HUP Solar One battery, the 125-33. It has 2490 AH at the
20 hr rate. The warranty is for 2100 cycles to 80% DOD. Also most of
the jumpers are included (bus bars within each 12 v group)
We've had nothing but happy customers since we started using the HUPs.
R.Ray Walters
CTO, Sol
wable Energy Systems
www.oregonsolarworks.com <http://www.oregonsolarworks.com>
541-218-0201 m
541-299-0402 o
On Tue, Mar 11, 2014 at 8:05 AM, Ray Walters <mailto:r...@solarray.com>> wrote:
Consider the HUP Solar One battery, the 125-33. It has 2490 AH at
the 20 hr rate.
Check the specs carefully, I had a customer looking at the GBs, and the
amp hr rating was suspicious, seems like they were claiming a much a
higher AH per lb than other lead acid batteries. Also they had verbally
told the customer a higher cycle life than what was listed in the actual
warranty
I use Turbocad, it can open Autocad
files, and is much more affordable. Seems to work well.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 3/12/2014 5:16 PM, Jason Szumlanski wrote:
Hi All;
I'm exploring options for an off grid project with an existing 30 Kw
Kohler wired for 208 vac 3 phase. The generator runs some 8 hp air
compressors, so rewiring it is not an option. We're primarily
interested in reducing gen run time from the current situation: 14 hrs/ day.
So far, o
sed Master Electrician
Solar Design Engineer
303 505-8760
On 3/24/2014 8:58 PM, William Miller wrote:
Ray
Sunny Island or XW.
Wm
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ray Walters
Sent: Monday, March 24,
mware would not
sell efficiently. Also the BOS cabinet is way too small, but aren't they
all?
Wm
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Ray Walters
Sent: Monday, March 24, 2014 8:35 PM
To: RE-
rging algorithm and integral gen start control.
Kevin
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org]On Behalf Of Ray
Walters
Sent: March 24, 2014 6:44 PM
To: RE-wrenches
Subject: [RE-wrenches] 208 3 phase Off Grid Inve
boun...@lists.re-wrenches.org]On Behalf Of Ray
Walters
Sent: March 24, 2014 6:44 PM
To: RE-wrenches
Subject: [RE-wrenches] 208 3 phase Off Grid Inverter
Hi All;
I'm exploring options for an off grid project with an existing 30 Kw
Kohler wired for 208 vac 3 phase. The generator runs some 8
This may be a rare load profile, but the possibility does exist.
The SMA white paper proposed by another wrench sums up the Pros pretty well.
Let me know if you need a copy.
William
Miller Solar
On Mar 25, 2014, at 5:42 PM, Ray Walters wrote:
I had another related question to add to using t
27;t installed one yet.
SMA inverters are more expensive. And they work very well. They also have a
very good battery charging algorithm and integral gen start control.
Kevin
-Original Message-
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.o
/2014 7:31 AM, Phil Undercuffler wrote:
You mentioned this is out of the country -- is it 230v line to
neutral, or 120/208? OutBack's export Radian can do three phase, up
to 72kW continuous.
HTH,
Phil
On Tuesday, March 25, 2014, Ray Walters <mailto:r...@solarray.com>> w
Hi Bob;
This sounds like once again Midnite is solving my problems, before I
even know I have them. Can your interface work directly with the SI, or
does it require the Sunny Web box, too?
Also, is Midnite's Whizbang Jr. shunt sensing usable in this, or do you
just defer to the SI's current s
First look at what his actual pumping needs are, and come up with a more
efficient way to provide the water.
I just got back tonight from changing out hydronic circulators for a
customer with new Hi Efficiency brushless ECM models. I was able to cut
the watt draw by 65%.
Also, its very possible
I've had the contacts arc and not disconnect at 144 vdc. I used a
modified relay from an electric vehicle company: KTA services.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760
On 4/4/2014 7:06 AM, Michael Morningst
It definitely depends on the flashing. The Oatey type with the rubber
gasket die after several years, and leak.
For our installations, it really depends on the roof. In some cases
with metal roofs, a flashing can't really have the overlap needed, and
so it just becomes a big gooed on L foot rea
Hi Allan;
Sounds like a great presentation, that I would want most customers to
see before even talking to them.
One thing you that might already be covering: Now that PV modules are
so cheap, many people are assuming a quality installed system goes for
$1/ watt. I have to bust the myth ever
I'm game: let's do it. I was just at Home Depot this weekend talking
about male male extension cords..
Ray
I also admit to, when in a whimsical mood, asking staff at Home Depot /
Ace hardware etc., how to make up a male to male extension cord so my
Honda generator can run my house in an
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