<div dir="auto"><div>I like data. Not being able to measure AC coupled PV input is far from my ideal in my opinion, but when there is no other practical choice, I guess I would do it. In fact, I have done ita couple of times.</div><div><br></div><div data-smartmail="gmail_signature"><div dir="ltr"><br>Jason Szumlanski<div><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Principal Solar Designer | Florida Solar Design Group</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">NABCEP Certified Solar Professional (PVIP)</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Florida State Certified Solar Contractor CVC56956</span></div><div><font color="#333333" face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif">Florida Certified Electrical Contractor EC13013208</font></div></div></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Thu, Aug 14, 2025, 10:48 AM Zeke Yewdall 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:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>While the AC coupled PV system can be added to the AC backed up loads panel, this defeats a lot of the functionality of a dedicated AC coupled PV array input on the AIOs and is not recommended by most of them. In theory, yes, it works on most inverters to just add it as a negative AC load -- and I've even AC coupled an old Trace SW, and it works fine on that, despite being designed and built before AC coupling was thought of.</div><div><br></div><div>But, if it's just on the AC loads output, the inverter does not have the ability to drop the AC PV array separately from the load if it needs to for high battery charge regulating, does not have the ability to measure the PV array input on monitoring, and may have other issues.</div><div><br></div><div>Zeke</div><div dir="ltr"><br></div><div dir="ltr">> *Subject:* Re: [RE-wrenches] Adding battery to grid tie<br>
><br>
> Correct me if I'm wrong: I believe AIOs can accept AC coupled power<br>
> through the load 'output' port. That leaves the Grid and Gen inputs free<br>
> for their roles as labelled.<br>
><br>
> The AC coupled inverters connect via a breaker in the critical loads<br>
> panel.<br>
><br>
><br>
> William Miller<br>
> Miller Solar.com<br>
> 805-438-5600<br>
> <a href="http://www.millersolar.com" rel="noreferrer noreferrer" target="_blank">www.millersolar.com</a><br>
></div><br></div>
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