<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>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. </span></div><div><span><br></span></div><div><span>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.</span></div><div><span><br></span></div><div><span>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?</span></div><div><span><br></span></div><div><span>Jeffrey Quackenbush</span></div><div><span>NABCEP Certified PV Installer</span></div><div><span>Peripatetic Solar Technician</span></div><div><br></div> <div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "> <div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">From:</span></b> Allan Sindelar
<allan@positiveenergysolar.com><br> <b><span style="font-weight: bold;">To:</span></b> re-wrenches@lists.re-wrenches.org <br> <b><span style="font-weight: bold;">Sent:</span></b> Saturday, December 31, 2011 8:42 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [RE-wrenches] battery venting<br> </font> <br>
<div id="yiv525350511">
<div>
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<br>
<br>
<div class="yiv525350511moz-signature">
<title></title>
<font face="Times New Roman, Times, serif"><b>Allan Sindelar</b></font><br>
<small><a rel="nofollow" ymailto="mailto:Allan@positiveenergysolar.com" target="_blank" href="mailto:Allan@positiveenergysolar.com"><font color="#000099" face="Times New Roman, Times, serif"><u>Allan@positiveenergysolar.com</u></font></a></small><font face="Times New Roman, Times, serif"><br>
<span style="font-size:10pt;">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 rel="nofollow" target="_blank" href="http://www.positiveenergysolar.com/"><u>www.positiveenergysolar.com</u></a></span></font>
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serif">
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</b></span></div>
<span style="font-size:10pt;"><br>
</span> </div>
<br>
On 12/31/2011 7:59 AM, JRQ wrote:
<blockquote type="cite">
<div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; ">
<div><span><span class="yiv525350511Apple-style-span" style="color: rgb(69, 69, 69); font-size: 12px; font-family: Arial, Helvetica, sans-serif; ">Wrenches,</span></span></div>
<div><span><span class="yiv525350511Apple-style-span" style="color: rgb(69, 69, 69); font-size: 12px; font-family: Arial, Helvetica, sans-serif; "><br>
</span></span></div>
<div><span><span class="yiv525350511Apple-style-span" style="color: rgb(69, 69, 69); font-size: 12px; font-family: Arial, Helvetica, sans-serif; ">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\u02da from plumb.</span></span></div>
<div><span><span class="yiv525350511Apple-style-span" style="color: rgb(69, 69, 69); font-size: 12px; font-family: Arial, Helvetica, sans-serif; "><br>
</span></span></div>
<div><span><span class="yiv525350511Apple-style-span" style="color: rgb(69, 69, 69); font-size: 12px; font-family: Arial, Helvetica, sans-serif; ">Or with bending the vent pipe: does
anyone have a best-practice rule for the sum of the angles
of bends?</span></span></div>
<div><span><span class="yiv525350511Apple-style-span" style="color: rgb(69, 69, 69); font-size: 12px; font-family: Arial, Helvetica, sans-serif; "><br>
</span></span></div>
<div><span><span class="yiv525350511Apple-style-span" style="color: rgb(69, 69, 69); font-size: 12px; font-family: Arial, Helvetica, sans-serif; ">Thanks,</span></span></div>
<div><span><span class="yiv525350511Apple-style-span" style="color: rgb(69, 69, 69); font-size: 12px; font-family: Arial, Helvetica, sans-serif; ">Jeffrey Quackenbush</span></span></div>
<div><span><span class="yiv525350511Apple-style-span" style="color: rgb(69, 69, 69); font-size: 12px; font-family: Arial, Helvetica, sans-serif; ">NABCEP Certified PV Installer</span></span></div>
<div><span><span class="yiv525350511Apple-style-span" style="color: rgb(69, 69, 69); font-size: 12px; font-family: Arial, Helvetica, sans-serif; ">Peripatetic Solar Technician</span></span></div>
<div><br>
</div>
<div style="font-size: 12pt; font-family: times, serif; ">
<div style="font-size: 12pt; font-family: times, serif; "> <font size="2" face="Arial">
<hr size="1"> <b><span style="font-weight:bold;">From:</span></b>
Drake <a rel="nofollow" class="yiv525350511moz-txt-link-rfc2396E" ymailto="mailto:drake.chamberlin@redwoodalliance.org" target="_blank" href="mailto:drake.chamberlin@redwoodalliance.org"><drake.chamberlin@redwoodalliance.org></a><br>
<b><span style="font-weight:bold;">To:</span></b>
<a rel="nofollow" class="yiv525350511moz-txt-link-abbreviated" ymailto="mailto:re-wrenches@lists.re-wrenches.org" target="_blank" href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a> <br>
<b><span style="font-weight:bold;">Sent:</span></b>
Saturday, December 31, 2011 8:08 PM<br>
<b><span style="font-weight:bold;">Subject:</span></b>
[RE-wrenches] Pole Mount PVC<br>
</font> <br>
<div id="yiv525350511">
<div>
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 <br>
<div> <font size="2">Drake
Chamberlin <br>
ATHENS ELECTRIC LLC<br>
OH License
44810 <br>
CO license 3773<br>
NABCEP Certified PV<br>
</font></div>
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