Hi Chris, I recently found myself in a similar situation with an existing 24V system with a 24v fridge and 12v freezer. The client wanted to upgrade to LiFePO4 so I decided that it would be easier and cheaper to go 48v. I used the Samlex IDC 360-C24 and IDC 360-C12 DC to DC converters to take the newly bussed 48v from the LiFePO4 battery to the existing 24v and 12v loads in their respective loads centers. Admittedly more moving parts, but I was happy with the outcome.
Hope this helps, Chris On Thu, Jan 2, 2020 at 10:56 PM John Blittersdorf < john.blittersd...@gmail.com> wrote: > Chris, > I have a 12vdc sunfrost fridge and a few 12v receptacles left over > from the 12v days and I did the same as your customer with 2L16’s and a few > panels and backed it up with an Iota charger plugged into an AC outlet > powered by my 48v Outback inverter. Then I discontinued the dedicated Pv > panels when remodeling the house and eventually got rid of the batteries. > Just the Iota to the DC circuit works great! > > Happy New Year > John Blittersdorf > > > > On Tue, Dec 31, 2019 at 11:52 AM Chris Schaefer <ch...@solarandwindfx.com> > wrote: > >> G'day and Happy New Year to All, >> >> Recently came across this offgrid OB FX system. The first part is a 12v >> battery system w/ 2 PV modules, 2 Trojan L16 batteries used to power a >> frig and freezer about 6 years old. The second is a 24v with 3kw of PV, 4 >> Trojan L16's, twin OB FX inverters installed by an HVAC contractor back in >> 2016. This was their first offgrid project. Oh boy, lol. The client would >> like to add more battery capacity to both. My thought here is since we are >> powering only a 12v frig and freezer why not simplify the system by >> creating a single battery bank and then tapping off of the 24v bank using >> proper fusing and creating a 12v buss? Admittedly I live in a 48v world so >> I'm asking our esteemed colleges as to options on how to address this. >> >> Oh yeah, the installer is unresponsive (no surprise there) and they are >> also having firmware issues with an old Mate 3 and would like me to install >> a new Mate 3s but that's another issue I'll tackle when I head out to site. >> >> Thanks All, >> Christopher- >> >> Chris Schaefer’s >> <http:www.solarandwindfx.com> >> >> *Tel/Fax 585-229-2083 or Cell 585-748-1870 * >> *5115 South Hill Road >> <https://www.google.com/maps/search/5115%0D%0ASouth+Hill+Road?entry=gmail&source=g> >> ~ Canandaigua New York 14424**www.solarandwindfx.com >> <http://www.solarandwindfx.com> ~ E-mail: ch...@solarandwindfx.com >> <ch...@solarandwindfx.com>* >> >> >> 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 >> >> List Address: RE-wrenches@lists.re-wrenches.org >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> _______________________________________________ > List sponsored by Redwood Alliance > > List Address: RE-wrenches@lists.re-wrenches.org > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > -- Chris Sparadeo C_802-369-4458 H_802-728-3059
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