[RE-wrenches] Mounting to metal roofs and thermal expansion

Fri Feb 6 10:22:49 PST 2009

Troy,

It is my current understanding that some manufacturers of metal roofing 
will not warranty their products if clamps are used on the standing 
seams. The reason given is that clamping the seams prevents the normal 
movement of the roofing during expansion and contraction. I can't say 
which company it is, but it's a big one.

Matt T

Troy Harvey wrote:

> I was wondering what issues people have had screwing/bolting mounting 
> feet to a metal roof with thermal expansion.
>
> I was looking at a european roof mounting foot and noticed they cut a 
> hole in the metal roof, and screw the foot to the sheathing using a 
> rubber gasket to make a water tight seal to the metal roof.
>
>
> Troy Harvey
> ---------------------
> Heliocentric
> 801-453-9434
> taharvey at heliocentric.org <mailto:taharvey at heliocentric.org>
>
>
> On Feb 5, 2009, at 10:14 PM, Greg Egan wrote:
>
>> Jeff, Joel, William and all,
>>
>> Thanks for all the input.  I think the general consensus is that 
>> giving out wholesale price information is not a great business 
>> strategy - on this list or anywhere else.
>>
>> I'm glad the PV pricing thread morphed into Professional Conduct.  
>> There was a lot of really good advice in those posts.  I think you 
>> saved a lot of us "lurkers" some scar - tissue!
>>
>> Thanks again,
>>
>> Greg Egan
>> Remote Power Inc.
>>
>> re-wrenches-request at lists.re-wrenches.org wrote:
>>
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>>>Today's Topics:
>>>
>>>   1. Charge Controllers with greater than 150 V input (Peter Parrish)
>>>   2. Re: Charge Controllers with greater than 150 V input (jay peltz)
>>>   3. Re: Professional conduct ( Jeff Yago)
>>>   4. Re: Professional conduct (William Miller)
>>>   5. Re: Charge Controllers with greater than 150 V input (Matt Tritt)
>>>
>>>
>>>----------------------------------------------------------------------
>>>
>>>Message: 1
>>>Date: Thu, 5 Feb 2009 17:23:18 -0800
>>>From: "Peter Parrish" <peter.parrish at calsolareng.com>
>>>Subject: [RE-wrenches] Charge Controllers with greater than 150 V
>>>	input
>>>To: "'RE-wrenches'" <re-wrenches at lists.re-wrenches.org>
>>>Message-ID: <E1LVFRF-0001UE-00 at pop-cowbird.atl.sa.earthlink.net>
>>>Content-Type: text/plain; charset="us-ascii"
>>>
>>>I seem to remember mention a while ago of a quality charge controller that
>>>supports a higher input voltage than 150 V? We would like 175 V. 
>>>
>>>- Peter
>>>
>>>Peter T. Parrish, President
>>>California Solar Engineering, Inc.
>>>820 Cynthia Ave., Los Angeles, CA 90065
>>>Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
>>>CA Lic. 854779, NABCEP Cert. 031806-26
>>>peter.parrish at calsolareng.com  
>>>
>>> 
>>>
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>>>------------------------------
>>>
>>>Message: 2
>>>Date: Thu, 5 Feb 2009 17:40:19 -0800
>>>From: jay peltz <jay at asis.com>
>>>Subject: Re: [RE-wrenches] Charge Controllers with greater than 150 V
>>>	input
>>>To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
>>>Message-ID: <96C18E8F-5047-4AE5-8888-D0B3FB570B81 at asis.com>
>>>Content-Type: text/plain; charset="us-ascii"; Format="flowed";
>>>	DelSp="yes"
>>>
>>>Hi Peter,
>>>
>>>Apollo makes a high voltage 200VOC unit, 80 amps.
>>>
>>>And the Classic from Midnight is almost ready to come out if I hear it  
>>>right.
>>>
>>>
>>>jay
>>>peltz power
>>>On Feb 5, 2009, at 5:23 PM, Peter Parrish wrote:
>>>
>>>  
>>>
>>>>I seem to remember mention a while ago of a quality charge  
>>>>controller that supports a higher input voltage than 150 V? We would  
>>>>like 175 V.
>>>>
>>>>- Peter
>>>>
>>>>Peter T. Parrish, President
>>>>California Solar Engineering, Inc.
>>>>820 Cynthia Ave., Los Angeles, CA 90065
>>>>Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
>>>>CA Lic. 854779, NABCEP Cert. 031806-26
>>>>peter.parrish at calsolareng.com
>>>>
>>>>
>>>>    
>>>>
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>>>
>>>------------------------------
>>>
>>>Message: 3
>>>Date: Thu, 5 Feb 2009 18:09:24 -0800
>>>From: " Jeff Yago" <jryago at netscape.com>
>>>Subject: Re: [RE-wrenches] Professional conduct
>>>To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
>>>Message-ID: <20090205180924.1FEED9EA at resin14.mta.everyone.net>
>>>Content-Type: text/plain; charset="us-ascii"
>>>
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>>>
>>>------------------------------
>>>
>>>Message: 4
>>>Date: Thu, 05 Feb 2009 18:33:45 -0800
>>>From: William Miller <wrmiller at charter.net>
>>>Subject: Re: [RE-wrenches] Professional conduct
>>>To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
>>>Message-ID: <6.0.1.1.2.20090205183240.03aab780 at pop.charter.net>
>>>Content-Type: text/plain; charset="us-ascii"; Format="flowed"
>>>
>>>Joel:
>>>
>>>Shoot.  I guess this means I gotta write a book...
>>>
>>>William
>>>
>>>
>>>
>>>
>>>
>>>At 03:43 PM 2/5/2009, you wrote:
>>>  
>>>
>>>>parts list, I ask them, "Why? Are you going to use the list to shop 
>>>>around?" Then I usually end up telling them politely, "I'm sorry, but I do 
>>>>not design PV systems for free. If you want parts lists and wiring 
>>>>diagrams, then buy my book."
>>>>
>>>>    
>>>>
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>>>------------------------------
>>>
>>>Message: 5
>>>Date: Thu, 05 Feb 2009 20:15:26 -0800
>>>From: Matt Tritt <solarone at charter.net>
>>>Subject: Re: [RE-wrenches] Charge Controllers with greater than 150 V
>>>	input
>>>To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
>>>Message-ID: <498BB95E.1070602 at charter.net>
>>>Content-Type: text/plain; charset="iso-8859-1"; Format="flowed"
>>>
>>>That will be the MidNite Classic, Peter. They aren't quite ready for 
>>>production yet, but thaere are promising Beta units in the field. 200 
>>>VDC I understand.
>>>
>>>Matt T
>>>
>>>Peter Parrish wrote:
>>>
>>>  
>>>
>>>>I seem to remember mention a while ago of a quality charge controller 
>>>>that supports a higher input voltage than 150 V? We would like 175 V.
>>>>
>>>>- Peter
>>>>
>>>>Peter T. Parrish, President
>>>>California Solar Engineering, Inc.
>>>>820 Cynthia Ave., Los Angeles, CA 90065
>>>>Ph 323-258-8883, Mobile 323-839-6108, Fax 323-258-8885
>>>>CA Lic. 854779, NABCEP Cert. 031806-26
>>>>peter.parrish at calsolareng.com  
>>>>
>>>> 
>>>>
>>>>------------------------------------------------------------------------
>>>>
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