On 11/20/2010 4:36 PM, Mark Frye wrote:
From the 2006 white paper:
*
"Polarization
*
Incorrect grounding of SunPower modules can inducea surface charge
which would lower the energyproduction. Previously SunPower has
announced the
discovery of the "surface polarization" effect which creates
Hi All,
Say and recommendations for a long 70' single row ground mount base structure.
20 modules in Portrait.
What I've done in the past is deep unistrut, but for something 70' long I
thought maybe there is some other ideas out there
that folks have done and like.
thanks,
jay
Peltz Power
P
>From the 2006 white paper:
"Polarization
Incorrect grounding of SunPower modules can induce a surface charge which
would lower the energy production. Previously SunPower has announced the
discovery of the "surface polarization" effect which creates
a non-destructive and reversible accumulation
Hi Allan,
I have seen the white paper from Sunpower, ( but don't have a copy) that shows
the losses as the voltage rises if using neg ground.
But from memory, if using at low voltages such as two in series there should be
minimal if any "loss" of watts.
If you could use them as singles, for say
Guys,Great stuff. These are just the kinds of things i was wanting to look out
for.
I already have a 16 or 18" mason bellhanger bit, although it likely will not be
long enuf, unless i use it with my 16" bit extension which can be use with
drill bits or hole saws. I've only been out to the sit
Don't confuse Hi-Pot testing with insulation resistance testing (Megging).
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf Of Drake
Sent: Saturday, November 20, 2010 9:56 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Megger for array
Would the walls of the bale house be considered part of the dwelling and
require careful consideration of whether metallic conduit is REQUIRED on the
DC run? 690.31 (E)
-Glenn Burt
From: re-wrenches-boun...@lists.re-wrenches.org
[mailto:re-wrenches-boun...@lists.re-wrenches.org] On Behalf O
Hello,
I'm working on a system which will have 5 kw on an outbuilding and 20kw on
the main building, all Enphase inverters, I plan to put an AC disco for the
5kw on the outside of its building and another on the outside of the main
building for the 20 kw array. Both arrays feed into the main pa
I'd just be worried about the rebar blowing the plaster out, when it comes out
the other side.
We welded a drill bit to the end of the rebar.
Once we're through with our rebar/ bit thing, we use diamond grit hole saws to
make a clean hole in the plaster.
I've been eyeing the Lenox carbide hole s
Thank you:
To all Wrenches who responded to the question about Megger testing.
The information discussed here is of major
importance to photovoltaic installers, and
clearly has been understood different ways. The
List is a great resource which helps increase the
quality and reliability of s
Good bit (sorry for the pun) about the carbide hole saws. Like you, I've
also got a box of bell hanger bits. However, straw bale walls start out at
14" thick and can go deeper - 36" and more. I've tried extensions and even
the 4' long Jesus bits (you know, those ultra long flexible electrician b
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