All of the inverters will be fried anyway. Or they will be bricked before that by a foreign actor. :)
I have one client maintaining a FLA battery bank on the side that is about 25% of the capacity of his LFP for dire emergencies. He's keeping the FLA topped off with the LFP system. Not the most efficient system, but if you're planning for Armageddon... why not? It would be an easy switchover if the inverters are still functional. He has a spare Sol-Ark on the shelf, too. I have actually suggested this to off-grid clients with HUPs that are still viable. If they have the space and the solar capacity, keep the HUPs, charge them on a smart load circuit with a Chargeverter when you have excess solar, and they will be there if the worst happens. Of course, I can see maintenance being neglected, but if they're otherwise going to the recycler anyway... why not? Most clients opt to remove them because they just don't want to look at them anymore. Batteries need to be pretty all of a sudden. Thanks, Tesla. Jason Szumlanski Principal Solar Designer | Florida Solar Design Group NABCEP Certified Solar Professional (PVIP) Florida State Certified Solar Contractor CVC56956 Florida Certified Electrical Contractor EC13013208 On Wed, Jun 17, 2026 at 6:41 PM Chris Schaefer via RE-wrenches < [email protected]> wrote: > One EMP and we'll all be clamoring for FLA's again. Hope it never comes to > that my friends. > > Christopher > > On Wed, Jun 17, 2026 at 6:13 PM Jay via RE-wrenches < > [email protected]> wrote: > >> Hi Chris >> >> The key is exactly what voltage, current and for how long. >> >> I’ve had a few cells fail over the years usually not my customers, and I >> think all but 1 was customer screwup. Wrong charge voltage, time not enough >> amps etc. and not testing via specific gravity and volts. >> but 1 was a true failure. >> >> The fall of lead has been faster than I expected. >> >> Jay >> >> >> >> >> >> On Jun 17, 2026, at 2:54 PM, Chris Daum via RE-wrenches < >> [email protected]> wrote: >> >> >> >> 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 [email protected]. >> If you have a bunch of these batteries out there, take note! >> >> >> >> And thanks for your input. >> >> >> >> Chris Daum >> >> Oasis Montana Inc. >> >> 406-777-4309 >> >> >> >> *From:* RE-wrenches <[email protected]> *On >> Behalf Of *Ray Walters via RE-wrenches >> *Sent:* Wednesday, June 17, 2026 12:33 PM >> *To:* [email protected] >> *Cc:* Ray Walters <[email protected]> >> *Subject:* Re: [RE-wrenches] Solar One HUP batteries >> >> >> >> 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. >> >> 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. >> >> 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. >> >> Ray Walters >> Remote Solar >> >> On 6/17/2026 11:59 AM, Dana Orzel via RE-wrenches wrote: >> >> Chris I am on the Solar One If no reply let em know I can dive into my >> battery box & look at ID & Data >> >> >> >> >> >> _________________________________________________________ >> >> Dana Orzel GREAT SOLAR WORKS! >> >> C – 208.721.7003 E – [email protected] >> >> W - www. greatsolarworks.com www.solarwork.com >> >> *“Responsible Technologies for Responsible People since 1988!”* >> >> >> >> >> >> _______________________________________________ >> >> List sponsored by Redwood Alliance >> >> >> >> Pay optional member dues here: http://re-wrenches.org >> >> >> >> List Address: [email protected] >> >> >> >> Change listserver email address & settings: >> >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> >> >> There are two list archives for searching. 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When one doesn't work, try the >> other: >> https://www.mail-archive.com/[email protected]/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> Pay optional member dues here: http://re-wrenches.org >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> There are two list archives for searching. When one doesn't work, try the >> other: >> https://www.mail-archive.com/[email protected]/ >> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org >> >> List rules & etiquette: >> http://www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> http://www.members.re-wrenches.org >> >> > > -- > > Chris Schaefer’s > > > *Tel 585-229-2083 or Cell 585-748-1870 * > *5115 S Hill Road ~ Canandaigua New York 14424**www.solarandwindfx.com > <http://www.solarandwindfx.com> ~ E-mail: [email protected] > <[email protected]>* > > > Thomas Jefferson, the author of our great Constitution, once said, > "democracy" will cease to exist when you take away from those who are > willing to work and give to those who would not." > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. 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