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<p>We were a distributor for the HUP Solar One for almost 2
decades. Enersys, the parent company, decided to pull the plug on
the entire HUP line, due to reduced demand for lead acid
batteries, and then the 2025 Tariffs were the final blow. We were
told to pull all advertising, and mention of what was a great
battery. I don't know what to say about a replacement cell, other
than to contact Enersys directly and try to work through the chain
of command. </p>
<p>Tommy retired with that, so is no longer a contact point, and I
really don't have anything to offer either. A bad cell is highly
unusual with the HUPs, I only saw that on a system where the
owners were not able to get to one of the cells, and so it went
dry. I've recovered cells by charging them vigorously with a
large automotive charger set to 6 v, and just put that across the
terminals of the individual cell while charging the whole system
as well. </p>
<p>Also, the HUPs need a pretty high charge rate to bring the cells
to full SG. Depends on the model, but the minimum charge rate can
be as high as 200 amps for the largest model. I've attached a
spec sheet with minimum charge rates listed. Basically if you
aren't getting close to those charge rates, you can end up with
sulfation damage long term. I've almost always been able to
recover HUPs, but it might take 2 days of EQing at very high
voltages (62 v @ 48v nominal) nothing will happen, and then
finally the SG will start moving. </p>
<p>Ray Walters<br>
Remote Solar</p>
<div class="moz-cite-prefix">On 6/17/2026 11:59 AM, Dana Orzel via
RE-wrenches wrote:<br>
</div>
<blockquote type="cite"
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<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century Gothic",sans-serif">Chris
I am on the Solar One If no reply let em know I can dive
into my battery box & look at ID & Data<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century Gothic",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:14.0pt;font-family:"Century Gothic",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Century Gothic",sans-serif">_________________________________________________________<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Century Gothic",sans-serif;color:#275317">Dana
Orzel </span><span
style="font-family:"Century Gothic",sans-serif;color:#275317">GREAT
SOLAR WORKS! <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Century Gothic",sans-serif;color:#275317">C
– 208.721.7003 E –
<a href="mailto:dana@solarwork.com" moz-do-not-send="true"><span
style="color:#275317;text-decoration:none">dana@solarwork.com</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-family:"Century Gothic",sans-serif;color:#275317">W
- www. greatsolarworks.com <a
href="http://www.solarwork.com/" moz-do-not-send="true"><span
style="color:#275317;text-decoration:none">www.solarwork.com</span></a><o:p></o:p></span></p>
<p class="MsoNormal"><i><u><span
style="font-family:"Century Gothic",sans-serif;color:#275317">“Responsible
Technologies for Responsible People since 1988!”<o:p></o:p></span></u></i></p>
<p class="MsoNormal"><o:p> </o:p></p>
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