Since batteries seem to be a hot topic lately, I've got a question...
...in a single 48V string, (24 x 2V) if each interconnect cable is 14"-4/0awg
and one cable in the middle of the string must be longer (btwn 20"-24" total
length)...
How detrimental will that be to the overall efficiency?
Sho
This issue came up for me as well.
I dont recall at the moment where it is written, perhaps it was OSHA, but
apparently the contractor (permit puller) is responsible for supplying access
and safety equip ie, fall protection (with exception of personal PPE, boots,
hat, glasses) for inspectors t
I'm not debating that it is snapnrack, but it does look very similar to
Kinetic, which we are using a lot of these days.
benn
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typos.
On 2013-07-31, at 2:21 PM, All Solar wrote:
> Can anyone please identify the ra
I believe there is an issue with connecting the GFX (or GVFX) to just any
generator, such that Outback recommends or perhaps requires (warranty reasons?)
that the only generator that can be used is a particular Honda generator. The
EU series maybe.
A real down fall of the GFX's.
benn
Sent fro
Wrenches,
I was asked... What is the minimum Lux level required to make usable
electricity with a commonly installed monocrystaline PV module.
The question is for the purpose of designing a tracker that will not operate
until a particular threshold is reached.
Thanks,
benn
Sent from a 'smart'
Hi Benn,
>
> It's around 200W per square meter.
>
> Blessings,
> Kelly
>
> Kelly Larson
> Electrical Engineer
> NABCEP Certified Solar PV Installation Professional
> ISPQ Master Trainer
> CA Electrical Contractor# 868189
> SolarKelly.com
>
> On Se
Drake,
If you are relocating the vent and abandoning the existing hole then could you
not just cut the vent flush to the roof or cut it right out and slide a
"flashing" up under the above shingles to cover the hole, rather than plugging
and filling the vent?
Or...
Given the pitch of the roof an
William,
With Tech90 regardless of the conductor size it always comes with a bare #8
included. A 3 conductor #10 (aka 10/3) will have red, white, and black #10
plus the bare#8.
A four conductor will have red, white, black and blue.
I have only ever seen or been made aware by my suppliers tha
ndeed always included and are available in different
sizes, to an extent.
benn
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typos.
On 2013-10-09, at 1:31 PM, Benn At DayStarSolar wrote:
> William,
> With Tech90 regardless of the conductor
Jesse,
'The Renewable Handbook' by William Kemp is a great resource for off-grid
living. There are a couple editions but any one of them makes a great read.
Also homepower.com and the solarpro website are packed with great articles.
benn
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William
For what it's worth, you may want to check with the rafter mfgr and/or Eng as
it is possible they will not allow holes being drilled into them and you could
open yourself up to liability issues.
I have a structural eng who is insisting I squeeze a construction adhesive
(such as LePage
SS cable ties for ~.33/ea
http://electricalwireties.com
benn
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typos.
> On Nov 14, 2013, at 10:51 AM, Ray Walters wrote:
>
> Where are you buying them from? I am so ready to move away from plastic zip
> ties. 59 c
Wrenches,
It has come to my attention that there is a proposed code rule for Section 50
(photovoltaics) of the CE Code (Canada's electrical code book) that wants to
see all PV wires protected from potential rodent damage.
It is suggesting that "all" PV wires be protected in conduit, even under
06-29, at 11:25 AM, "Benn At DayStarSolar" wrote:
> Wrenches,
> It has come to my attention that there is a proposed code rule for Section 50
> (photovoltaics) of the CE Code (Canada's electrical code book) that wants to
> see all PV wires protected from potential rode
Drake,
This won't help with the height issue, but maybe you could trim the flashing
where it is close to the skylights?
Or is it possible to access the underside of the roof beside the skylight so
you can add a spanner btwn the rafters so you can have room for the flashing?
No answer for the h
I haven't read up on the mentioned structural screws yet, but do they
specifically state that they can be driven "without" a pilot hole? What is the
justification and how are they different so that they won't cause a board to
split under pressure?
Does anyone have some good info on this?
benn
William, Jason;
I appreciate the suggestion, it sounds like an ideal solution.
I do wonder why you prefer posts when you could use the tile hooks and avoid
the extra work and time of cutting and flashing? If it makes for a better
attachment structurally and weather-proof wise, then I'm all for
Eric,
you can purchase L-foot brackets of varying heights upwards of 7" from several
PV racking mfgrs.
You are not limited by the height of the flashing bolt or post.
Check DPW's catalogue for example.
benn
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typos
Jason,
Why don't you transition to romex in the Soladeck, eliminating the need for a
junction box in the attic?
I abide by the CE Code (Canadian) and run a #6green from the roof to the dist
pnl.
benn
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typos.
On 2
Sounds like you are referring to what we refer to around here as teck cable.
Very common stuff for industrial applications.
Here, pretty much any electrical wholesaler has stock in several
configurations.
Can be ordered in 2,3,4,5,6... (Not sure the limit extent) number of conductors
and in
Troy,
Maybe adding additional support to the trusses would allow you to spread out
the Lfeet a bit more? ...but then there is still that added cost!?!
QuickmountPV for one, makes a pretty solid case that any roof penetration needs
to be flashed if the waterproof integrity of a roof is to be ma
Larry,
Would it not be a more straightforward approach to just size the strings,
temperature compensating for the coldest anticipated temp?
Nonetheless, such a device could be useful in some circumstances. I'd be
interested to know if your search comes up with something.
benn
Sent from a 'smar
Jesse,
I can't picture how you will use the flashing and EMT as a guide?
2x6 tongue and groove? So is it laid flat (interconnecting the T&G) or is it on
edge like a truss?
Either way, if you can establish a reference point from inside to the roof,
then from the inside (if accessible) accurately
Jason, for a flat roof with any sort of equipment or obstructions on it,
tripping hazards are to be expected and a person with access should be expected
to watch out for them. However these days we have to go out of our way to
protect against stu**dity (I mean those who are out of their element
Allen,
What is the roofing material?
S-5 has a product that works well with standing-seam.
benn
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typos.
On 2013-02-08, at 9:02 AM, Allen Frishman wrote:
> Wrencher's,
> I'm working on a project for a New construct
Carl,
Each specific module install instruction guide should state the acceptable
mounting attachment points.
benn
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typos.
On 2013-04-19, at 7:27 PM, Carl Adams wrote:
> Hello wrenches,
>
> I have a request for qu
Kris,
I use a Mac (mechanic tools).
It ranges up to 88 in-lb.
let me know if you are interested in the model#.
benn
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typos.
On 2013-04-22, at 12:43 PM, Kristopher Schmid wrote:
> Any of you folks using these?
> A
Chris,
If using black nylon ones then I'd add that you use the ones with the metal
"catch tooth" (for lack of a better term) as opposed to the ones with a plastic
catch tooth.
There is a price and quality difference.
I get my stainless steel ties from a local supplier. I'd have to check the
Andrew,
Thanks for the feedback.
What are the chances that you would know the mfgr of the ties? Long shot?
Under an array(on a roof), yes the ties would be protected from direct
sunlight, but exposed to higher than ambient temperatures.
I have seen some brittle/broken nylon cable ties that w
Jason's suggestion of hiring a pro is great.
Just to throw another 'remedy' idea out there.
If you are still looking to do it yourself. Vinegar would be effective. Not
sure it's effect on mod back sheets thou? But it could be sprayed down with
water after the chaos has calmed down. A few squi
Wrenches,
This is a request for a colleague. Anybody have suggestions where I could
access a consumption limiting kWh meter with the following characteristics?
> 120VAC 30A
> Displays accumulated wattage and turns off power access at a preset point.
> Resettable after 24 hours.
It is for a camp
Jesse,
A good decision can be based on, among other site/load specific details, the
site's "micro-climate".
Do they tend to have clear mornings and cloudier afternoons/evenings?
...or cloudy/foggy mornings and clearer afternoons/evenings?
Maybe throw the different directions into PVWatts and s
significant snow here in
> northern Vermont and no one is surprised and disappointed with the poor
> winter production.
>
> Dave Palumbo
>
> -Original Message-
> From: re-wrenches-boun...@lists.re-wrenches.org
> [mailto:re-wrenches-boun...@lists.re-wrenches.org]
Anyone successfully/properly painted silver/anodized rails to black, or black
rails to silver to match module frames?
We have a large project and the supplier hiccup'd the order (if you can believe
it). The black rails are already installed and silver framed modules are what
arrived.
One of t
ype of rail maybe you can talk them into
> leaving it?
>
>
> Best,
>
> August
>
> -Original Message-
> From: re-wrenches-boun...@lists.re-wrenches.org
> [mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Benn At
> DayStarSolar
> Sent: Thursday, J
Jesse,
Can't imagine there is a definitive answer. The further the better.
Given what you are venting out of the battery box (very light hydrogen gas) I
would at the very least make sure the battery vent is higher up than the
furnace intake.
Any other sort of barrier btwn the two vents, mounte
Workmanship. Quality of work
As the Cdn Electrical Code does, I'm sure your NEC has a mention that any work
shall be done using acceptable means.
"Canadian Electrical Code
Rule 2-108 Quality of work
The mechanical arrangement and execution of the work in connection with any
electrical installa
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