<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">In a battery backup mostly float state with low cycle count, I’d add to a bank several years later. <div><br></div><div>It’s really hard to say “several” since most LiFePO4 batteries haven’t been alive for that long. </div><div><br></div><div>I’ve personally added 8 Pytes E-Box to 8 eFlex with no issue. The Schneider Insight even allows two comm cables and shows both SOCs. </div><div><br></div><div>At another customer, I’m adding four Pytes batteries a quarter until we get 16. Grid Tie battery back up. Once we get to 16 will turn on time of use metering and exercise the batteries a bit more.</div><div><br></div><div><div dir="ltr">Thank you,<div><br></div><div>Maverick</div><div><div id="AppleMailSignature" style="caret-color: rgb(0, 0, 0); color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px;"><div class="ApplePlainTextBody"><br></div><div class="ApplePlainTextBody">Maverick Brown<br>Off-Grid Solar Commander since 2006<br>Maverick Solar Enterprises, Inc.<br> • Solar Commander Remote Power<br> • SunFlow Systems Cathodic Protection <br>maverick@mavericksolar.com<br>512-460-9825</div><div><br></div></div></div><div><br></div></div><div dir="ltr"><br><blockquote type="cite">On Apr 23, 2024, at 4:05 PM, jay via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><span>HI All</span><br><span></span><br><span>Speaking of batteries I wonder what you all make of this.</span><br><span></span><br><span>I was reading the Fortress battery manual and it says they don’t recommend adding new lithium batteries to older lithium batteries if the age is over 1 year difference.</span><br><span></span><br><span>Thoughts?</span><br><span></span><br><span>thanks</span><br><span>jay</span><br><span>_______________________________________________</span><br><span>List sponsored by Redwood Alliance</span><br><span></span><br><span>Pay optional member dues here: http://re-wrenches.org</span><br><span></span><br><span>List Address: RE-wrenches@lists.re-wrenches.org</span><br><span></span><br><span>Change listserver email address & settings:</span><br><span>http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org</span><br><span></span><br><span>There are two list archives for searching. When one doesn't work, try the other:</span><br><span>https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/</span><br><span>http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org</span><br><span></span><br><span>List rules & etiquette:</span><br><span>http://www.re-wrenches.org/etiquette.htm</span><br><span></span><br><span>Check out or update participant bios:</span><br><span>http://www.members.re-wrenches.org</span><br><span></span><br></div></blockquote></div></body></html>