<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;color:#000000">Jay,</div><div class="gmail_default" style="font-family:tahoma,sans-serif;color:#000000">If they want to keep their SI's, a couple of years ago I successfully replaced an iron Edison battery with 3 Fortress evault batteries closed loop. Had to update SI firmware and get all evault batteries to same firmware but it was pretty straight forward. Ran it open loop for a month or two until I got all the firmware updated. It's off grid with SB11k for AC coupling. Can share the programming with you if interested.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;color:#000000">Gary</div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Jul 15, 2025 at 12:14 PM jay 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><div>Thanks William,</div><div><br></div><div>Yes it’s AC coupled which I neglected to include. </div><div><br></div><div>Given how inexpensive the new inverter gear is, the age of the old stuff and seemingly the complication of integration I will propose replacement of both inverter and battery. </div><div><br></div><div>thanks</div><div><br></div><div>jay</div><div><br></div><div><br><div><br></div><div><br id="m_-3842731197324027744lineBreakAtBeginningOfMessage"><div><br><blockquote type="cite"><div>On Jul 15, 2025, at 8:44 AM, William Miller via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>> wrote:</div><br><div><div dir="auto">If the system is AC coupled I would suggest you dump the Sunny Islands immediately. </div><div dir="auto"><br></div><div dir="auto">We are soon going to wreck out 4 SIs and install 2 envy 12s. The SIs just would not work AC coupled to e-vault 18s. <br clear="all"><br clear="all"><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, Jul 15, 2025 at 6:43 AM jay 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">HI All,<br>
<br>
I might be inheriting a 12 yr old SI off grid system, that has a dying Absolyte battery. <br>
<br>
<br>
I know there have been some discussions on the SI and lithium. <br>
<br>
I’m just trying to understand what the options are with closed vs open loop, basically can it be done. <br>
<br>
If I do get the project, I will happily pay someone who’s done all the hard work for the education to tell me what the programming steps are. <br>
<br>
And at what point does it make sense to just remove the SI and install a AIO? <br>
<br>
thanks in advance.<br>
<br>
jay<br>
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