Gary, I keep 24v and 48 v IOTA chargers with jumper cables attached for those times when systems are dead. Just a minute or so plugged into my Honda 2000I or generator on bypass gets everything lit up and running. Just did one yesterday. Got Kohler running but Mate 3 and inverter would not turn on.
John B Sent from my iPhone > On Feb 10, 2018, at 3:37 AM, Sindelar Solar <[email protected]> wrote: > > Gary, you might try an old-fashioned approach: bypass the controller to send > the array straight to the batteries until threshold voltage is reached. More > specifically, bypass one of the controllers; assuming 48, 60 or 72 Vnom > depending on array. Let the other controller remain in normal operation. Send > the unregulated array to bring initial battery voltage up; then the other > controller takes over and the one that was bypassed now is reconnected. > Better if the unregulated array is the smaller of the two, I would suspect. > What I'm suggesting will work with flooded lead-acid, and likely VRLA > lead-acid as well, as long as the unregulated array is taken out of the > system before voltage exceeds bulk. It may not work at all with these Li-I, > as I have no experience with restoring them. Daryl may well be right > about being unrestorable below a threshold voltage; also the batteries may > need an operational BMS to take a charge. So this is perhaps just food for > thought. > > Allan > -- > Allan Sindelar > [email protected] > NABCEP Certified PV Installation Professional > New Mexico EE98J Journeyman Electrician > Founder (Retired), Positive Energy, Inc. > 505 780-2738 cell > >> On 2/9/2018 6:16 PM, Gary Rochlin wrote: >> Does anyone have any information or specifications for an older circa >> 2010-2012 iCel System Lithium Ion Battery. We are doing a repair on an >> older 48V Lithium Ion system consisting of 3-6 ICel batteries wired in >> parallel and 1 Xantrex 6848 and 2 Xantrex Conext MPPT 60 150 Solar Charge >> controllers. Via a surge from SCE system shut down and sat before we were >> called in. Batteries are sitting at 6.67V and the charge controller will >> not turn on unless the batteries are at 40V since at the time they were made >> for lead acid batteries. I’m looking at finding the way to charge the iCel >> batteries or goose the charge controller into thinking 40V are coming from >> the batteries. I think I’m making sense here. >> >> Blue Sky Energy >> >> [email protected] >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/[email protected]/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: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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