I've recently set up a dual 4448 PAE and a single 4448 PAE with 16 cell PF lithiums. I used the new ARC50-L, ARTR, and BMK-L. Lithium versions. With the older inverter versions and new ARTR on the parallel setup I was able to adjust the LBCO to >50vdc. Good. The same version single PAE with new ARC50-L. Only 48.8 v LBCO Then a new DMK ( Magnum) Power Sngle PAE and ARC50-L. same issue 48.8 Max LBCO. Not sure what to make of it now. Maybe i need a new board for the affected units.
Jeremy Rodriguez All Solar Inc. Penrose CO 719-276-4954 Established 1998 On Tue, Nov 3, 2026 at 7:33 PM David Quattro <[email protected]> wrote: > $350 > I got it from Inverter Supply in Royal Palm Beach, FL > you should double check with Magnum that this is the correct card for your > model #: > Magnum Energy, TCB-MS2812, > Control Board (MS2812 Inverter) > > 1 350.41 350.41 > ------------------------------ > Subtotal: 350.41 > Free Shipping Option (Free Shipping):: 0.00 > Order Total: 350.41 > > > > *David Quattro* > President > > On Tue, Nov 3, 2026 at 6:16 PM Dave Tedeyan <[email protected]> > wrote: > >> I will be doing this soon as well. My homeowner has two PT-100 charge >> controllers and a BMK as well. I was planning on using the relay in the >> charge controller to control a 30 or 40a contactor (with a 48vdc coil) to >> cut out the loads once the battery voltage gets too low. Magnums LBCO only >> goes up to 48.8v. And Sol-Max recommended using 50v for their powerflo5 >> batteries. >> >> And thanks to Zeke for also pointing out (this was specifically for the >> powerflo5 batteries): >> Make sure you adjust the settings on the magnum inverter and charge >> controllers for the batteries. The default DIP switch settings on the >> PT100 or inverters will not work properly with most lithium batteries. >> They need to be set for absorb voltage of 57.2 volts for the PF5 >> batteries, for 10 minutes. Float voltage of 54.0 volts. The defaults all >> try for a longer absorb time generally a minimum of one hour, which can >> make the lithium batteries rather unhappy. >> >> >> On Tue, Nov 3, 2026, 11:03 AM jay <[email protected]> wrote: >> >>> Thanks david >>> >>> What does a new card cost and are they available from the new magnum? >>> >>> jay >>> >>> On Nov 3, 2026, at 8:55 AM, David Quattro <[email protected]> >>> wrote: >>> >>> I recently replaced Lead acid with Lithium with a Magnum. You will need >>> a to buy a new card from Magnum - original card doesn’t have the proper >>> charging protocol for lithium. >>> >>> >>> *David Quattro* >>> President >>> >>> On Mon, Nov 2, 2026 at 12:34 PM Jay <[email protected]> wrote: >>> >>>> I have someone wanted to do lithium on an older magnum. They don’t >>>> charge with generator often. >>>> >>>> I seem to vaguely remember someone having issues with magnum and >>>> lithium? >>>> Anyone know? >>>> >>>> Thanks >>>> Jay >>>> _______________________________________________ >>>> List sponsored by Redwood Alliance >>>> >>>> Pay optional member dues here: http://re-wrenches.org >>>> >>>> List Address: [email protected] >>>> >>>> Change listserver email address & settings: >>>> >>>> https://lists.re-wrenches.org/mailman/options/re-wrenches_lists.re-wrenches.org/ >>>> >>>> There are two list archives for searching. 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