<div dir="ltr"><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I kind of saw the writing on the wall a few years back. The incumbent installer for all the off-grid islands around me installed dozens of HUP systems over the last 5 years. <span class="Asgive ng" style="border-style:none;background:none">Now</span> he is gone, and I am actively removing <span class="Asgive ng" style="border-style:none;background:none">them</span> and installing LFPs. Most of them have been abused, so they're 6,000-pound bricks in elevated equipment buildings at very remote sites. Not fun.</div><br clear="all"></div><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">As much as I loved these batteries for some early off-grid jobs I did, the modularity, expandability, lack of maintenance, monitoring insight, and weight of LFP <span class="Q6ibn ng" style="border-style:none;background:none">is</span> too much to ignore. <span class="Q6ibn ng" style="border-style:none;background:none">Not</span> perfect, for sure, but overall it's better for my situation.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Incidentally, I think Tommy lived about 30 minutes away from me, in Placida, FL, near Boca Grande. I seem to recall picking up a HUP battery bank at his shop for my father's house in the Caribbean about a decade ago. Seems like yesterday, but also a million years ago in some ways! I just removed a battery from an island that I bought from him in 2010, but it had already been replaced a few years back and was just waiting for a barge to remove it. It lasted about 12 years, though. Hard to argue with that performance!</div><br></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><br>Jason Szumlanski<br>Principal Solar Designer | Florida Solar Design Group<br>NABCEP Certified Solar Professional (PVIP)<br>Florida State Certified Solar Contractor CVC56956<br>Florida Certified Electrical Contractor EC13013208<br></div><div><br></div><div><br></div></div></div></div><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Wed, Jun 17, 2026 at 4:54 PM Chris Daum via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div class="msg2412030020174224641"><div lang="EN-US" style="overflow-wrap: break-word;"><div class="m_2412030020174224641WordSection1"><p class="MsoNormal">Yes, I’ve been selling these since 2007. Damn good batteries; I did hear from Tommy in a roundabout fashion; THE contact person at Enersys is Jammie Bednarek, 484-203-8660, and her e-mail is <a href="mailto:jammie.bednarek@eversys.com" target="_blank">jammie.bednarek@eversys.com</a>. If you have a bunch of these batteries out there, take note!<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">And thanks for your input.<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><p class="MsoNormal">Chris Daum<u></u><u></u></p><p class="MsoNormal">Oasis Montana Inc.<u></u><u></u></p><p class="MsoNormal">406-777-4309<u></u><u></u></p><p class="MsoNormal"><u></u> <u></u></p><div><div style="border-width:1pt medium medium;border-style:solid none none;border-color:rgb(225,225,225) currentcolor currentcolor;padding:3pt 0in 0in"><p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">From:</span></b><span style="font-size:11pt;font-family:Calibri,sans-serif"> RE-wrenches <<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" target="_blank">re-wrenches-bounces@lists.re-wrenches.org</a>> <b>On Behalf Of </b>Ray Walters via RE-wrenches<br><b>Sent:</b> Wednesday, June 17, 2026 12:33 PM<br><b>To:</b> <a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a><br><b>Cc:</b> Ray Walters <<a href="mailto:ray@solarray.com" target="_blank">ray@solarray.com</a>><br><b>Subject:</b> Re: [RE-wrenches] Solar One HUP batteries<u></u><u></u></span></p></div></div><p class="MsoNormal"><u></u> <u></u></p><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. <span><u></u><u></u></span></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. <u></u><u></u></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. <u></u><u></u></p><p>Ray Walters<br>Remote Solar<u></u><u></u></p><div><p class="MsoNormal">On 6/17/2026 11:59 AM, Dana Orzel via RE-wrenches wrote:<u></u><u></u></p></div><blockquote style="margin-top:5pt;margin-bottom:5pt"><p class="MsoNormal"><span style="font-size:14pt;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</span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-size:14pt;font-family:"Century Gothic",sans-serif"> </span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Century Gothic",sans-serif">_________________________________________________________</span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Century Gothic",sans-serif;color:rgb(39,83,23)">Dana Orzel GREAT SOLAR WORKS! </span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Century Gothic",sans-serif;color:rgb(39,83,23)">C – 208.721.7003 E – <a href="mailto:dana@solarwork.com" target="_blank"><span style="color:rgb(39,83,23);text-decoration:none">dana@solarwork.com</span></a></span><u></u><u></u></p><p class="MsoNormal"><span style="font-family:"Century Gothic",sans-serif;color:rgb(39,83,23)">W - www. <a href="http://greatsolarworks.com" target="_blank">greatsolarworks.com</a> <a href="http://www.solarwork.com/" target="_blank"><span style="color:rgb(39,83,23);text-decoration:none">www.solarwork.com</span></a></span><u></u><u></u></p><p class="MsoNormal"><i><u><span style="font-family:"Century Gothic",sans-serif;color:rgb(39,83,23)">“Responsible Technologies for Responsible People since 1988!”</span></u></i><u></u><u></u></p><p class="MsoNormal"> <u></u><u></u></p><p class="MsoNormal"><span><br><br><u></u><u></u></span></p><pre>_______________________________________________<u></u><u></u></pre><pre>List sponsored by Redwood Alliance<u></u><u></u></pre><pre><u></u> <u></u></pre><pre>Pay optional member dues here: <a href="http://re-wrenches.org" target="_blank">http://re-wrenches.org</a><u></u><u></u></pre><pre><u></u> <u></u></pre><pre>List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><u></u><u></u></pre><pre><u></u> <u></u></pre><pre>Change listserver email address & settings:<u></u><u></u></pre><pre><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><u></u><u></u></pre><pre><u></u> <u></u></pre><pre>There are two list archives for searching. When one doesn't work, try the other:<u></u><u></u></pre><pre><a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" target="_blank">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><u></u><u></u></pre><pre><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><u></u><u></u></pre><pre><u></u> <u></u></pre><pre>List rules & etiquette:<u></u><u></u></pre><pre><a href="http://www.re-wrenches.org/etiquette.htm" target="_blank">http://www.re-wrenches.org/etiquette.htm</a><u></u><u></u></pre><pre><u></u> <u></u></pre><pre>Check out or update participant bios:<u></u><u></u></pre><pre><a href="http://www.members.re-wrenches.org" target="_blank">http://www.members.re-wrenches.org</a><u></u><u></u></pre><pre><u></u> <u></u></pre></blockquote></div></div>_______________________________________________<br>
List sponsored by Redwood Alliance<br>
<br>
Pay optional member dues here: <a href="http://re-wrenches.org" rel="noreferrer" target="_blank">http://re-wrenches.org</a><br>
<br>
List Address: <a href="mailto:RE-wrenches@lists.re-wrenches.org" target="_blank">RE-wrenches@lists.re-wrenches.org</a><br>
<br>
Change listserver email address & settings:<br>
<a href="http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org" rel="noreferrer" target="_blank">http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</a><br>
<br>
There are two list archives for searching. When one doesn't work, try the other:<br>
<a href="https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/" rel="noreferrer" target="_blank">https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</a><br>
<a href="http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org" rel="noreferrer" 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" rel="noreferrer" target="_blank">http://www.re-wrenches.org/etiquette.htm</a><br>
<br>
Check out or update participant bios:<br>
<a href="http://www.members.re-wrenches.org" rel="noreferrer" target="_blank">http://www.members.re-wrenches.org</a><br>
<br>
</div></blockquote></div>