<div dir="ltr">I didn't install it but it was well done, has three Sunny Islands and three Sunny Boys. My only involvement has been to repair a breaker that failed, and to service the generator.</div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Dec 17, 2015 at 11:18 AM, Drake <span dir="ltr"><<a href="mailto:drake.chamberlin@redwoodalliance.org" target="_blank">drake.chamberlin@redwoodalliance.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
With relays you can set the A/C up as a dump load that will
activate when the grid goes down. <br><span class=""><br>
<br>
At 06:59 AM 12/17/2015, you wrote:<br>
</span><blockquote type="cite"><span class="">I have a customer that has had
AGM batteries in the Caribbean for many years without any sign of
capacity loss, but...they air condition (?) the room they are in, and
they do not use any discharge, they are purely setup as a UPS style
system. Unless the power fails, all the power is exported, and they use
grid power.<br>
When using AGM as an offgrid solar system, they last about three years
here.<br><br>
On Wed, Dec 16, 2015 at 9:44 PM, jay
<<a href="mailto:jay.peltz@gmail.com" target="_blank">jay.peltz@gmail.com</a>>
wrote:<br>
</span><dl>
<dd>HI Luke,<br><br>
</dd><dd><span class="">Without knowing what the charging parameters its really hard to know
whats going on.<br><br>
</span></dd><dd><span class="">And this false issue with life span is years really gets me.<br>
</span></dd><dd>Batteries are measured in cycle life, period, So to say a IND
battery will get 15 to 20 years is bunk.<br>
</dd><dd>It’ll get the cycles based on DOD, if its charged correctly,
watered and the sun is in a good phase and, and and,<br><br>
</dd><dd>I’ve got a guy who’s worn out his Hup’s in around 5-6
years.<br>
</dd><dd>But how would any other but an IND battery worked with that hard of a
life, yikes, L-16’s would have been a set a year.<br><br>
</dd><dd>But I’m guessing his 11 year old batteries could be quite
done. And he is caught in the perfect bind.<br>
</dd><dd><span class="">Do you spend money on replacing some of the cells?<br>
</span></dd><dd>If it was my client, I’d say no, he’d be throwing good money
after bad.<br><br>
</dd><dd>jay<br><br>
</dd><dd>peltz power<br><br>
<br><br>
<br>
</dd><dd><span class="">> On Dec 16, 2015, at 12:50 PM, Dana
<<a href="mailto:dana@solarwork.com" target="_blank">dana@solarwork.com</a>>
wrote:<br>
</span></dd><dd>><br>
</dd><dd>> We recommend an EQ when there is a 0.02 SG differential on any
one cell to the rest of the pack, use a refractometer for SG readings,
install watering systems with a electrolyte port or water the
battery bank ourselves, & do not do systems without a charging power
backup.<br>
</dd><dd>><br>
</dd><dd>>
----------------------------------------------------------------------------<br>
</dd><dd>> Dana Orzel<br>
</dd><dd>> Great Solar Works, Inc -Â NABCEP # 051112-136<br>
</dd><dd>> E -
<a href="mailto:dana@solarwork.com" target="_blank">dana@solarwork.com</a>Â - Web -
<a href="http://solarwork.com" target="_blank">solarwork.com</a><br>
</dd><dd>> O - <a href="tel:970.626.5253" target="_blank">970.626.5253</a>Â C -
<a href="tel:208.721.7003" target="_blank">208.721.7003</a><br>
</dd><dd><span class="">> "Responsible Technologies for Responsible People since
1988"<br>
</span></dd><dd>> ï Please consider the environment before printing this
email.<br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>> -----Original Message-----<br>
</dd><dd><div><div class="h5">> From: RE-wrenches
[<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">
mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] On Behalf Of
Dave<br>
</div></div></dd><dd><div><div class="h5">> Sent: Wednesday, December 16, 2015 10:23 AM<br>
</div></div></dd><dd>> To: 'RE-wrenches'<br>
</dd><dd><div><div class="h5">> Subject: Re: [RE-wrenches] HuP Conundrum<br>
</div></div></dd><dd>><br>
</dd><dd>> Luke,<br>
</dd><dd>><br>
</dd><dd><div><div class="h5">> Contac HUP for specific advice. You've probably already done
that?<br>
</div></div></dd><dd>><br>
</dd><dd>> What comes to mind:<br>
</dd><dd><div><div class="h5">> Since you have two series strings, run the house on one string
of all good cells.<br>
</div></div></dd><dd>><br>
</dd><dd><div><div class="h5">> Pull out the weak cells and charge them as per HUP's
advice.<br>
</div></div></dd><dd>><br>
</dd><dd><div><div class="h5">> I'm guessing that this problem has happened because the
homeowner did not properly charge the batteries.<br>
</div></div></dd><dd><div><div class="h5">> Homeowner most likely did not use a hydrometer upon EQ'ng the
cells.<br>
</div></div></dd><dd><div><div class="h5">> Homeowner thought the cells were fully charged and equal but
obviously they were not.<br>
</div></div></dd><dd><div><div class="h5">> Record keeping, log books etc.. for people caring for expensive
batteries are well worth the effort.<br>
</div></div></dd><dd>><br>
</dd><dd>> David Palumbo<br>
</dd><dd>> Independent Power LLC<br>
</dd><dd>> 462 Solar Way Drive<br>
</dd><dd>> Hyde Park, VT 05655<br>
</dd><dd>> <a href="tel:802-371-8678" target="_blank">802-371-8678</a> cell<br>
</dd><dd>> <a href="tel:802-888-4917" target="_blank">802-888-4917</a> home<br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>> -----Original Message-----<br>
</dd><dd><div><div class="h5">> From: RE-wrenches
[<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">
mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] On<br>
</div></div></dd><dd>> Behalf Of Luke Christy<br>
</dd><dd><div><div class="h5">> Sent: Wednesday, December 16, 2015 12:01 PM<br>
</div></div></dd><dd>> To: RE-wrenches<br>
</dd><dd>> Subject: [RE-wrenches] HuP Conundrum<br>
</dd><dd>><br>
</dd><dd>> Hi Friends,<br>
</dd><dd>><br>
</dd><dd><div><div class="h5">> With all of the battery threads going on right now I figured it
would be a<br>
</div></div></dd><dd><div><div class="h5">> good time to start another one.<br>
</div></div></dd><dd>><br>
</dd><dd><div><div class="h5">> I have a customer with a large off-grid system who has just
started having<br>
</div></div></dd><dd><div><div class="h5">> trouble with a bank of HuP batteries. This system is 48V with 8x
12V<br>
</div></div></dd><dd><div><div class="h5">> 6-85F-27S batteries in two series strings. Charging is supplied
by around 10<br>
</div></div></dd><dd>> kW of PV.<br>
</dd><dd>><br>
</dd><dd><div><div class="h5">> I didn't install the system and the customer has always taken
care of the<br>
</div></div></dd><dd><div><div class="h5">> maintenance and watering himself. He has seemingly been pretty
diligent<br>
</div></div></dd><dd>> about taking care of things, including equalizing on a
regular basis.<div><div class="h5"><br>
</div></div></dd><dd>> However, recently he started having voltage problems and when I
made a site<br>
</dd><dd>> visit to check on the batteries, I found that 3 of the 8x 12V
batteries each<br>
</dd><dd>> had a cell with SG so low it wouldn't register on my
hydrometer.<br>
</dd><dd>><br>
</dd><dd>> Obviously this is a problem, and owing to some complicating
factors I'm not<br>
</dd><dd>> really sure how best to address the issue.<br>
</dd><dd>><br>
</dd><dd>> Replacing the entire battery bank will be unbelievably
expensive, especially<br>
</dd><dd>> given that the house is in a remote location and there is
difficult access<br>
</dd><dd>> to the battery room. To add a another factor, the house is
currently<br>
</dd><dd>> unoccupied while the owner tries to sell the property, so he is
not exactly<br>
</dd><dd>> eager to invest a lot of money into battery replacement.<br>
</dd><dd>><br>
</dd><dd>> The batteries are only 11 years old, so they should
theoretically have quite<br>
</dd><dd>> a bit of life left in them. Perhaps those of you with more
experience with<br>
</dd><dd>> larger batteries can advise. Can the cells be resurrected with
careful<br>
</dd><dd>> charging and equalizing?<br>
</dd><dd>><br>
</dd><dd>> What would you do?<br>
</dd><dd>><br>
</dd><dd>> Thanks as always for opinions and advice.<br>
</dd><dd>><br>
</dd><dd>> Luke Christy<br>
</dd><dd>><br>
</dd><dd>> NABCEP Certified PV Installation ProfessionalT: Certification
#031409-25<br>
</dd><dd>> NABCEP Certified Solar Heating InstallerT: Certification
#ST032611-03<br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>> Solar Gain Services, LLC<br>
</dd><dd>> PO Box 531<br>
</dd><dd>> Monte Vista, CO. 81144<br>
</dd><dd>> SGSRenewables@Gmail.com<br>
</dd><dd>> <a href="tel:719.588.3044" target="_blank">719.588.3044</a><br>
</dd><dd>>
<a href="http://www.sgsrenewables.com" target="_blank">www.sgsrenewables.com</a><br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>><br>
</dd><dd>><br><br>
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NABCEP Certified Solar PV Installer™<br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br><div class="gmail_signature"><div dir="ltr">Chris Mason<div><div style="color:rgb(136,136,136)"><span style="font-size:13px">NABCEP Certified Solar PV Installer™</span></div><div style="color:rgb(136,136,136)"><span style="color:rgb(34,34,34)">Solar Design Engineer</span></div><div style="color:rgb(136,136,136)"><span style="font-size:13px">Generac Generators Industrial technician</span></div></div><div style="color:rgb(136,136,136)"><span style="font-size:13px"><br></span></div><div><a href="http://www.cometenergysystems.com" target="_blank">www.cometsolar.com</a></div><div>264.235.5670</div><div>869.662.5670</div><div>Skype: netconcepts</div></div></div>
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