Hi Dan, I have experience with installing and servicing Sonnen. Although I let my certification lapse, Sonnen still allows me to work on their systems (maybe because no one else will in my area). Let me know if I can be of any help.
Best, Chris On Mon, Feb 9, 2026 at 8:27 PM Dan Fink via RE-wrenches < [email protected]> wrote: > Esteemed Wrenches — Please contact me off list if you are willing and able > to provide such a document as described here. > > I run the NABCEP PV Associate training program at Pueblo Community College > in Colorado, funded by a State renewable energy workforce development > grant. A colleague way up in NOCO where I live is upgrading the ESS at one > of his installations away from the existing Sonnen. His client wants to > donate it to the college. The original Sonnen ESS equipment cost, no > install labor included, was right at about $24k. > > The IRS paperwork 8283 clearly states that the Appraiser cannot be me or > anyone from the college, and can’t be anyone from the PV installation > company either. > > PCC and myself would be eternally grateful if someone with Sonnen > experience could help and provide an appraisal. The client wants a tax > deduction of course, but my students and myself could have endless fun with > a vintage Sonnen, explore different battery charge/discharge curves, try to > dark start, etc. > > TIA, please contact off list. I have lots of photos, receipts etc. > > Dan Fink > Renewable Energy Program Coordinator, Pueblo Community College > IREC Certified Instructor for PV and Small Wind Installation > NABCEP Certified PV System Inspector > NABCEP PV Associate > [email protected] > 970-672-4342 > > > _______________________________________________ > 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 > >
_______________________________________________ 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
