<div dir="ltr">William, Wrenches,<div>I have done several over the past couple years, the only issue I had, I needed to build a resister that mimiced the BTSas 75 degrees, because the SI.s will brop and raise max voltage according to the temp, this must be changed to prevent this as the battery BMS will or at least should do that anyway. Now I dont know about your batteries and I would suggest that you look at the battery cables sizes, I looked at a system that had these so called hight output batteries with # 8 plug in cables, worked very poorly just a FYI </div><div>Fun times</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Nov 25, 2025 at 9:42 AM William Miller via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Jim:</div><div dir="auto"><br></div><div dir="auto">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. </div><div dir="auto"><br></div><div dir="auto">I know if you call SMA for tech support they may hang up on you when you tell them there are lithium batteries.</div><div dir="auto"><br></div><div dir="auto">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. </div><div dir="auto"><br></div><div dir="auto">These days I pair lithium only with inverters designed for them. </div><div dir="auto"><br></div><div dir="auto">Good luck. </div><div dir="auto"><div dir="auto"><div dir="ltr" class="gmail_signature"><br>William Miller<br>Miller Solar.com<br>805-438-5600<br><a href="http://www.millersolar.com" target="_blank">www.millersolar.com</a><br></div></div></div><div><br></div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Nov 25, 2025 at 7:33 AM Jim Gowdy via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>Hello All,</div><div> 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.....</div><div><br></div><div>System:</div><div>48v</div><div><br></div><div>NEW BATTERY:</div><div>China Aviation Lithium Battery CO. </div><div>model: CA180F </div><div>nominal voltage: 3.2v</div><div>rated capacity: 180Ah</div><div>rated energy: 576Wh</div><div><br></div><div>Inverter:</div><div>Sunny Island </div><div>model: SI 4548-US-10</div><div><br></div><div>CHARGE CONTROLLER:</div><div>Midnight Solar Classic 150</div><div><br></div><div>SOLAR ARRAY:</div><div>N/A....it was dark when I was at the site so I couldn't take any notes</div><div><br></div><div><br></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr">Jim with Gowdy Electric<div>Cambria, Ca 93428</div><div>business 805 927 2630</div><div>cell 805 975 5279</div></div></div></div>
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