<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">Hi Wayne. </div><div dir="ltr"><br></div><div dir="ltr">As it’s an offgrid system open loop my preference is for batteries that have a built in display so you don’t need wifi/web connection to monitor. </div><div dir="ltr"><br></div><div dir="ltr">If the customer has a FNDC or trimetric the accuracy of those with lithium can take a while to dial in. </div><div dir="ltr">Having an actual % reading on the battery has been very helpful to the few dozen systems I’ve retro fitted lithium into offgrid systwms. </div><div dir="ltr"><br></div><div dir="ltr">I also look for batteries that give setup settings for open loop. Most don’t. </div><div dir="ltr"><br></div><div dir="ltr">Ive used a few brands and have been happy with eg4. </div><div dir="ltr"><br></div><div dir="ltr">Out of curiosity 5kwh seems extremely small. </div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr"><br><blockquote type="cite">On Jun 28, 2025, at 9:05 PM, Wayne Irwin via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
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We have an off-grid customer who has a 10KW array and 2 - VFXR3648's, 2 - FM 80's and dying lead acid batts.</div>
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I'm looking for advice on pairing something in the range of +/-5 kWh of Lithium (preferably LFP).</div>
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I have not yet paired OB with lithium. Compatibility and Reliability are my goal.</div>
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What has worked best for you?</div>
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Your experience and advice are greatly appreciated.</div>
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<div class="elementToProof" style="direction: ltr; font-size: 12pt;"><span style="font-family: calibri, helvetica, sans-serif; color: rgb(6, 64, 12); background-color: rgba(0, 0, 0, 0); line-height: normal;">Wayne Irwin</span><span style="font-family: Calibri, Helvetica, sans-serif; color: rgb(0, 0, 0);"><br>
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