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Gary,<br>
<br>
If this is a new digital meter, it may be accumulating all energy
without regard to direction. That is the way the utilities purchase
them, to prevent energy theft, so that is the default configuration
from the meter manufacturers. When purchasing a digital kWh meter to
use for metering production per Outback's instructions, you must
specify that the meter is for net metering. Outback should warn about
that in their instructions!<br>
<br>
It is pretty easy to wire the Outback metering scheme incorrectly. To
test for that: <br>
1. Disable the solar and battery charger, then confirm that the meter
disk does not spin when there is a load is turned on the protected
loads panel.<br>
2. Disable the loads and solar, then force a bulk charge and confirm
that the meter spins backwards.<br>
<br>
Even the digital meters show you what way power is flowing with a
simulated disk: dots progressing to the right is forward, left is
backwards.<br>
<br>
Kent Osterberg<br>
Blue Mountain Solar<br>
<br>
<br>
Gary Easton wrote:
<blockquote
cite="mid:d89b27097859bcde6cf5d7c91e92ea88.squirrel@arp-solar.com"
type="cite">
<pre wrap="">Hello,
I am having trouble metering a system with an Outback 3648 serving a
protected loads panel. I need a way to accurately measure the production.
I have a dual stator 12s meter installed with the "AC in" coming in the
bottom and out the top and the AC from the inverter going in the top and
out the bottom with a neutral from the E-panel connected to the fifth leg.
The meter is not reading anything close to the Outback. Any ideas would be
greatly appreciated.
Gary Easton
Appalachian Renewable Power Systems
NABCEP Certified Solar PV
NABCEP Certified Solar Thermal
740-277-8498
</pre>
<blockquote type="cite">
<pre wrap="">Kelly,
When I came across language like this in an RFP, my assumption was that we
needed to work with a specialty lightning protection subcontractor, a firm
listed by UL. I would call them up, give them a project description and
request a quote, which I would build into our cost estimate for the
project.
Included in their scope of work is providing a ³UL Listed Lightning
Protection Certificate.² You can include that scope of work as a line item
in our proposal. If the proposal requires that you include resumes for key
team members, you might also include the lightning company¹s bio as it
shows
you¹ve done your due diligence.
On the projects that I managed in this fashion, the lightning protection
company always came in after our construction was substantially complete.
There may be cases where you want to coordinate the that scope of work
differently and get them on site earlier. They should be able to tell you
what will work best, based on the general project description and your
specific equipment grounding scheme.
David Brearley, Senior Technical Editor
SolarPro magazine
NABCEP Certified PV Installer
<a class="moz-txt-link-abbreviated" href="mailto:david.brearley@solarprofessional.com">david.brearley@solarprofessional.com</a>
On 7/31/10 3:28 PM, "Kelly Keilwitz, Whidbey Sun & Wind"
<a class="moz-txt-link-rfc2396E" href="mailto:kelly@whidbeysunwind.com"><kelly@whidbeysunwind.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Hi All,
I'm working on the design for a PV & Wind power system for a military
installation. The specs call for Lightning Protection as follows:
</pre>
<blockquote type="cite">
<pre wrap="">"Provide a complete lightning protection system with a UL Lightning
Protection Inspection Certificate.
including, but not necessarily limited to, strike termination devices,
conductors, ground terminals,
interconnecting conductors, surge suppression devices, and other
connectors
and fittings required for
a complete and usable system. "
</pre>
</blockquote>
<pre wrap="">Anyone have an idea of what qualifies? Is there a package product that
has the
"UL Lightning Protection Inspection Certificate"?
Thanks,
-Kelly
Kelly Keilwitz, P.E.
Whidbey Sun & Wind
Renewable Energy Systems
NABCEP Certified PV Installer
<a class="moz-txt-link-abbreviated" href="mailto:kelly@whidbeysunwind.com">kelly@whidbeysunwind.com</a>
360.678.7131
</pre>
</blockquote>
<pre wrap="">
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