[RE-wrenches] thermal imaging stud sensors

[Darryl Thayer]

Bosch and Milwalkee Tool have them, I have seen them advertized and demonstrated on a mock roof, They work reliably with one layer of asphalt shingles, not with two. The cheap ones do not work.  these are ultra sound I think.  
Darryl

--- On Mon, 8/30/10, Gary Easton <gary at arp-solar.com> wrote:

> From: Gary Easton <gary at arp-solar.com>
> Subject: [RE-wrenches] thermal imaging stud sensors
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Date: Monday, August 30, 2010, 8:22 AM
> Anyone have experience with a thermal
> imaging stud sensor or any other
> sensor that will work through roofs?
> Gary Easton
> Appalachian Renewable Power Systems
> NABCEP Certified Solar PV
> NABCEP Certified Solar Thermal
> 740-277-8498
> 
> > Drake,
> >
> > Chris Freitas wrote an article on this topic in SP1.1,
> ³Form 12S Metering
> > for Grid-Tied Systems w/ Battery Backup.² Here¹s a
> link to the article and
> > a
> > wiring diagram:
> >
> >
> > http://solarprofessional.com/article/?file=SP1_1_pg16_QandA_3&search=
> >
> > David Brearley, Senior Technical Editor
> > SolarPro magazine
> >
> > On 8/10/10 7:57 AM, "Drake Chamberlin"
> > <drake.chamberlin at redwoodalliance.org>
> wrote:
> >
> >> Hi Alex,
> >>
> >> The one meter hook up always seems confusing to
> me.  I'm still confused.
> >>  Do
> >> we have the AC IN at both the bottom left and top
> right?   To me it
> >> seems that
> >> the AC OUT from the inverter would go to the upper
> left and the
> >> protected
> >> loads panel would be fed from the bottom left.
> >>
> >> I've never used this method, but would like to use
> it instead of the two
> >> meter
> >> method.
> >>
> >> Thanks,
> >>
> >> Drake
> >>
> >>
> >> At 12:19 AM 8/10/2010, you wrote:
> >>> When metering for production here in
> Washington State, we use both
> >>> sides in a
> >>> 12s 120volt meterbase with fifth jaw. 
> top right inverter ac in, bottom
> >>> right
> >>> ac from grid.  top left from battery back
> up, bottom left from inverter
> >>> ac
> >>> in, fifth jaw neutral.
> >>>
> >>> this set up allows grid tied selling and
> battery saved energy selling
> >>> to be
> >>> metered while subtracting energy used to
> charge batteries and
> >>> subtracting any
> >>> power needed to run the inverter.
> >>>
> >>> hope this helps.
> >>>
> >>> contact me off list if you need the diagram
> (in office)
> >>>
> >>>
> >
> >
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