<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">I don\u2019t remember hearing you can\u2019t upgrade. You could ask zonna what the board part numbers are between the 4 and the 8. </div><div dir="ltr">I know you can turn an 8 into a 4. </div><div dir="ltr"><br></div><div dir="ltr">But the power modules would need to be same rev. </div><div dir="ltr"><br></div><div dir="ltr">And if it\u2019s a 4048 not an A, I think it\u2019s about impossible to find anything to work on the non A variants </div><div dir="ltr"><br></div><div dir="ltr">Good luck</div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Nov 3, 2025, at 7:39\u202fPM, Kirk Herander via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<div dir="ltr"><div class="gmail_default" style="font-size:large">Dana,</div><div class="gmail_default" style="font-size:large">Interesting. The procedure as I recall to input the installer menu code is in the last quick start guide they published, along with the generic password itself. it's needed to turn on AC coupling, maybe also for your upgrade.</div><div class="gmail_default" style="font-size:large"><br></div><div class="gmail_default" style="font-size:large">And I was told 3 years ago by OB that you can't just add a 4kw inverter module to ramp up a 4k to an 8k. As a result I upgraded my customer from a 4048 to an 8048. I still have the 4048 you can pull the module out of. I'll sell the whole inverter cheap.</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Mon, Nov 3, 2025 at 2:25\u202fPM Dana Orzel 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">There is a procedure along with a tech code which I have, to get into the installer menu in a radian. Does anybody know the steps to get into the installer menu?<br>
Thank you in advance as always<br>
Dana Orzel<br>
C: 208.721.7003<br>
E- <a href="mailto:dana@solarwork.com" target="_blank">dana@solarwork.com</a><br>
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</blockquote></div><div><br clear="all"></div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr"><p></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><a name="SignatureSanitizer__MailAutoSig" style="font-size:10pt"><b><img width="96" height="72" src="https://ci3.googleusercontent.com/mail-sig/AIorK4zIGox3hmaGW8StlnANQvRdXBrTEgpee6ZmV_8h-pfWcEl7lwlqfhSqd2PgPh89cgzwpzfUzuuIGxKE" data-unique-identifier=""><br></b></a></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><a name="SignatureSanitizer__MailAutoSig" style="font-size:10pt"><b>Kirk Herander / </b></a><b style="font-size:10pt"><a href="mailto:kirkh@vermont.solar" title="Send an email to kirkh@vermont.solar; Send an email to kirkh@vermont.solar" style="color:blue" target="_blank">kirkh@vermont.solar</a></b></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><b>Owner|Principal, VT Solar, LLC</b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt"><b><i>Celebrating our 34<sup>st</sup> Anniversary 1991-2025!!</i></b></span></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt">dba Vermont Solar Engineering</span><br></p><p class="MsoNormal" style="color:rgb(0,0,0);font-family:Arial;font-size:16px;margin:0in 0in 0.0001pt"><span style="font-size:10pt">802.559.1225</span></p></div></div>
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