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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Jeffery, I sent a system with some friends who needed a backup to combat rolling blackouts in Hyderabad. I’ve also spent quite a bit of time around the equator and know that you need to plan for Murphy’s Law <i>squared</i>. I would design it as simple and as free of moving parts as possible. If it is in South India, buildings have lots of ventilation, and it won’t be the problem that it could be in the winter north. If you build the box like Dan suggests as a </span><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>“</span><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>screened in range hood” so the hydrogen is funneled upwards, with oversized and continuously sloped the vent piping, 3” PVC with few (1 or 2) 45 angles, I think you’d be fine. If you want to go more conservatively, up it to 4”.</span><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Bill Dorsett<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Sunwrights<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Manhattan, KS<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:14.0pt;font-family:"Calibri","sans-serif";color:black'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> re-wrenches-bounces@lists.re-wrenches.org [mailto:re-wrenches-bounces@lists.re-wrenches.org] <b>On Behalf Of </b>JRQ<br><b>Sent:</b> Saturday, December 31, 2011 1:47 PM<br><b>To:</b> RE-wrenches<br><b>Subject:</b> [RE-wrenches] battery venting<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal style='background:white'><span style='color:black'>I am doing this project in India. The cost structures here are a great deal more constrained that what we're used to. Using AGM batteries is going to be a deal-breaker with the client as far as cost. <o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'>I also don't know if I can persuade the client to ship anything additional from the US. We pay more for electrical stuff, and then shipping adds quite a bit more on top. I've sold them on the idea of an Outback GTFX inverter on the basis of its functionality in a backup setup, but, for instance, I'm having a hard time convincing them that an E-Panel and a listed combiner box are a good idea, rather than just cobbling the BOS enclosures together from locally available breakers and PVC j-boxes. I also may end going with a indian-made PWM CC rather than a FM60. The quality of electrical work here is abysmal. I'm not sure if I can successfully make an argument on the grounds of somewhat contingent safety concerns, or even less on engineering standards.<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'>So I'm wondering: are there parameters that constrain the bending of a venting pipe and the maximum angle from plumb that the pipe should take? And does the pipe diameter play a role in those parameters?<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'>Jeffrey Quackenbush<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'>NABCEP Certified PV Installer<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'>Peripatetic Solar Technician<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'><o:p> </o:p></span></p></div><div><div><div class=MsoNormal align=center style='text-align:center;background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><hr size=1 width="100%" align=center></span></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> Allan Sindelar <<a href="mailto:allan@positiveenergysolar.com">allan@positiveenergysolar.com</a>><br><b>To:</b> <a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a> <br><b>Sent:</b> Saturday, December 31, 2011 8:42 PM<br><b>Subject:</b> Re: [RE-wrenches] battery venting</span><span style='color:black'><o:p></o:p></span></p><div id=yiv525350511><div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='color:black'>Jeff,<br>I would use a Power Vent by Zephyr Industries. In addition to a 12V or 48V fan, his units have a built-in backdraft damper. Negative building pressure under certain conditions would be a concern of mine, so I wouldn't rely on angle to ensure exhaust always travels up and out.<br>Allan<o:p></o:p></span></p><div><p class=MsoNormal style='background:white'><b><span style='color:black'>Allan Sindelar</span></b><span style='color:black'><br></span><span style='font-size:10.0pt;color:black'><a href="mailto:Allan@positiveenergysolar.com" target="_blank"><span style='color:#000099'>Allan@positiveenergysolar.com</span></a></span><span style='color:black'><br></span><span style='font-size:10.0pt;color:black'>NABCEP Certified Photovoltaic Installer<br>NABCEP Certified Technical Sales Professional<br>New Mexico EE98J Journeyman Electrician<br><b>Positive Energy, Inc.</b><br>3201 Calle Marie<br>Santa Fe, New Mexico 87507<br><b>505 424-1112</b><br><a href="http://www.positiveenergysolar.com/" target="_blank">www.positiveenergysolar.com</a></span><span style='color:black'> <o:p></o:p></span></p><div style='margin-right:722.25pt'><p class=MsoNormal style='background:white'><span style='color:black'><o:p> </o:p></span></p></div><p class=MsoNormal style='background:white'><span style='color:black'><o:p> </o:p></span></p></div><p class=MsoNormal style='background:white'><span style='color:black'><br>On 12/31/2011 7:59 AM, JRQ wrote: <o:p></o:p></span></p><div><div><p class=MsoNormal style='background:white'><span class=yiv525350511apple-style-span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#454545'>Wrenches,</span></span><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span class=yiv525350511apple-style-span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#454545'>I'm looking at a potential battery backup system wtih a 200 AH @48V flooded battery bank in the basement electrical room of a 3 story building. There is a window in the electrical room. The batteries will be located about 10' from an outdoor wall. The building is all reinforced concrete, so I can not run a vent pipe vertically from the batteries. Does anyone have a rule of thumb for how much the vent pipes can be angled from the batteries? Would it be more lenient for short sections of pipe (say <2') versus one long angled piece from the batteries? My instinct would be to keep the pipe no more than 45˚ from plumb.</span></span><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span class=yiv525350511apple-style-span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#454545'>Or with bending the vent pipe: does anyone have a best-practice rule for the sum of the angles of bends?</span></span><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span class=yiv525350511apple-style-span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#454545'>Thanks,</span></span><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span class=yiv525350511apple-style-span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#454545'>Jeffrey Quackenbush</span></span><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span class=yiv525350511apple-style-span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#454545'>NABCEP Certified PV Installer</span></span><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span class=yiv525350511apple-style-span><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#454545'>Peripatetic Solar Technician</span></span><span style='color:black'><o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='color:black'><o:p> </o:p></span></p></div><div><div><div class=MsoNormal align=center style='text-align:center;background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><hr size=1 width="100%" align=center></span></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>From:</span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> Drake <a href="mailto:drake.chamberlin@redwoodalliance.org" target="_blank"><drake.chamberlin@redwoodalliance.org></a><br><b>To:</b> <a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a> <br><b>Sent:</b> Saturday, December 31, 2011 8:08 PM<br><b>Subject:</b> [RE-wrenches] Pole Mount PVC</span><span style='font-family:"Times","serif";color:black'><o:p></o:p></span></p><div id=yiv525350511><div><p class=MsoNormal style='background:white'><span style='font-family:"Times","serif";color:black'>Hello Wrenches,<br><br>With pole mount systems, It looks cleaner and is safer to run the PVC conduit down the pole into the concrete, and use a 90 degree elbow to come out through the side of the anchor underground. This way, the pipe is protected from mechanical damage, and there is nothing to trip over when adjusting the array for seasonal tilt. <br><br>I was told that some building departments will not allow this. Has anyone had a problem with using this method, either technical or legal? How do you like to route your conduits?<br><br>Thank you,<br><br>Drake <o:p></o:p></span></p><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Times","serif";color:black'>Drake Chamberlin <br>ATHENS ELECTRIC LLC<br>OH License 44810 <br>CO license 3773<br>NABCEP Certified PV</span><span style='font-family:"Times","serif";color:black'><o:p></o:p></span></p></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Times","serif";color:black'><br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a><br><br>Check out participant bios:<br><a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a><br><br><o:p></o:p></span></p></div></div></div><pre style='background:white'><span style='color:black'><o:p> </o:p></span></pre><pre style='background:white'><span style='color:black'>_______________________________________________<o:p></o:p></span></pre><pre style='background:white'><span style='color:black'>List sponsored by Home Power magazine<o:p></o:p></span></pre><pre style='background:white'><span style='color:black'><o:p> </o:p></span></pre><pre style='background:white'><span style='color:black'>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><o:p></o:p></span></pre><pre style='background:white'><span style='color:black'><o:p> </o:p></span></pre><pre style='background:white'><span style='color:black'>Options & settings:<o:p></o:p></span></pre><pre style='background:white'><span style='color:black'><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><o:p></o:p></span></pre><pre style='background:white'><span style='color:black'><o:p> </o:p></span></pre><pre style='background:white'><span style='color:black'>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><o:p></o:p></span></pre><pre style='background:white'><span style='color:black'><o:p> </o:p></span></pre><pre style='background:white'><span style='color:black'>List rules & etiquette:<o:p></o:p></span></pre><pre style='background:white'><span style='color:black'><a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">www.re-wrenches.org/etiquette.htm</a><o:p></o:p></span></pre><pre style='background:white'><span style='color:black'><o:p> </o:p></span></pre><pre style='background:white'><span style='color:black'>Check out participant bios:<o:p></o:p></span></pre><pre style='background:white'><span style='color:black'><a href="http://www.members.re-wrenches.org" target="_blank">www.members.re-wrenches.org</a><o:p></o:p></span></pre><pre style='background:white'><span style='color:black'><o:p> </o:p></span></pre></div></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='color:black'><br>_______________________________________________<br>List sponsored by Home Power magazine<br><br>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org">RE-wrenches@lists.re-wrenches.org</a><br><br>Options & settings:<br><a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br><br>List-Archive: <a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" target="_blank">http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</a><br><br>List rules & etiquette:<br><a href="http://www.re-wrenches.org/etiquette.htm">www.re-wrenches.org/etiquette.htm</a><br><br>Check out participant bios:<br><a href="http://www.members.re-wrenches.org">www.members.re-wrenches.org</a><br><br><o:p></o:p></span></p></div></div></div></div></body></html>