Jim: I haven’t tried lithium batteries with a traditional charge controller yet. All of the equipment you list was designed for lead acid. The narrower voltage range of the lithium may confuse the charge controller. Same with the AGS triggering.
I know if you call SMA for tech support they may hang up on you when you tell them there are lithium batteries. It may work right away or you may spend a lot of time making it kind of work. I hope you can make the client understand this is an experiment. Tech support from the battery manufacturer may not be great being a Chinese company. These days I pair lithium only with inverters designed for them. Good luck. William Miller Miller Solar.com 805-438-5600 www.millersolar.com On Tue, Nov 25, 2025 at 7:33 AM Jim Gowdy via RE-wrenches < [email protected]> wrote: > Hello All, > I have a client that just got some lithium batteries and they have a > sunny island inverter with a Midnight Charge controller. I've heard and > experienced integrating Lithium batteries into a Sunny Island inverter is > challenging and could create problems. Has anyone had experience with > these batteries or installing lithium batteries with these components? > Below are some details about the system so far..... > > System: > 48v > > NEW BATTERY: > China Aviation Lithium Battery CO. > model: CA180F > nominal voltage: 3.2v > rated capacity: 180Ah > rated energy: 576Wh > > Inverter: > Sunny Island > model: SI 4548-US-10 > > CHARGE CONTROLLER: > Midnight Solar Classic 150 > > SOLAR ARRAY: > N/A....it was dark when I was at the site so I couldn't take any notes > > > > -- > Jim with Gowdy Electric > Cambria, Ca 93428 > business 805 927 2630 > cell 805 975 5279 > _______________________________________________ > 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 > >
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