<div dir="auto">Hi Lars,</div><div dir="auto"><br></div><div dir="auto">It sounds like an issue with frequency shifting. I\u2019m guessing that this is mostly happening when the battery is full. The Radian is shifting its frequency (to probably around 63-64 Hz) to turn of the AC coupled PV inverter. Some lights and electronics don\u2019t like this and can either flicker, or turn off. This is one of the issues with AC coupling that makes it a less than ideal fit for off-grid application. </div><div dir="auto"><br></div><div dir="auto">One option would be to look into replacing the lights with something that has a larger tolerante for change in frequency. Another option might be to lower the inverter\u2019s grid frequency tolerance so that it trips and turns off before the flights end up freaking out. </div><div dir="auto"><br></div><div dir="auto">Hope this helps.</div><div dir="auto"><br></div><div dir="auto">-Chris </div><div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Feb 2, 2022 at 2:59 PM Lars Ortegren <<a href="mailto:lars@cal-solar.com">lars@cal-solar.com</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">Wrenches,<div>I'm hoping to solve an issue we've had with a couple of our off grid AC coupled systems. We have had multiple reports of different LED and traditional ballasted fluorescent systems "flickering" during the day when the AC systems are producing power. We havent had issues with other off grid AC coupling using Sunny Islands, or even old VFX inverters, but this does seem to be an issue directly related to the Radians.I'm wondering if any of you have had experience with this, and if you found any hacks to "clean up" the power?<br clear="all"><div><br></div>-- <br><div dir="ltr" data-smartmail="gmail_signature"><div dir="ltr"><table border="0" style="font-family:"Gill Sans","Gill Sans MT","Myriad Pro","DejaVu Sans Condensed",Helvetica,Arial,sans-serif"><tbody><tr><td style="border-right:1px solid rgb(246,134,31)"><img src="https://drive.google.com/uc?id=1LptPS1iWaK_VMn--zBINi1Cg7bJYQnN-" style="max-width:120px;padding:0px 12px"></td><td valign="middle" style="padding-left:14px"><table height="100"><tbody><tr><td><span style="font-size:22px">Lars Örtegren</span></td></tr><tr><td>General Manager</td></tr><tr><td>Co-Founder</td></tr><tr><td>Worker-Owner</td></tr><tr><td><a href="https://www.mypronouns.org/" target="_blank">He/Him</a></td></tr></tbody></table></td></tr><tr><td colspan="2" style="border-bottom:1px solid rgb(246,134,31)"></td></tr><tr><td><a href="https://www.cal-solar.coop/" style="border:0px" target="_blank"><img src="https://drive.google.com/uc?id=1gCUq0gp4skvGziB6mzVbQsUmYbTcQB_a" style="max-height:140px;display:inline-block"></a></td><td><table style="padding-left:9px"><tbody><tr><td><img src="https://cdn2.hubspot.net/hubfs/53/tools/email-signature-generator/icons/phone-icon-2x.png" color="#f6851f" width="13" style="display:block;background-color:rgb(246,133,31)"></td><td><a href="tel:530+274+3671" color="#000000" style="color:rgb(0,0,0)" target="_blank">530 274 3671 | ext 307</a></td></tr><tr><td><img src="https://cdn2.hubspot.net/hubfs/53/tools/email-signature-generator/icons/email-icon-2x.png" color="#f6851f" width="13" style="display:block;background-color:rgb(246,133,31)"></td><td><a href="mailto:lars@cal-solar.com" color="#000000" style="color:rgb(0,0,0)" target="_blank">lars@cal-solar.com</a></td></tr><tr><td><img src="https://cdn2.hubspot.net/hubfs/53/tools/email-signature-generator/icons/link-icon-2x.png" color="#f6851f" width="13" style="display:block;background-color:rgb(246,133,31)"></td><td><a href="https://www.cal-solar.coop/" color="#000000" style="color:rgb(0,0,0)" target="_blank">www.Cal-Solar.coop</a></td></tr><tr><td><img src="https://cdn2.hubspot.net/hubfs/53/tools/email-signature-generator/icons/address-icon-2x.png" color="#f6851f" width="13" style="display:block;background-color:rgb(246,133,31)"></td><td><a href="https://www.google.com/maps/search/149+E.+Main+St,+Grass+Valley,+CA+95945?entry=gmail&source=g">149 E. 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</blockquote></div></div>-- <br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div>Chris Sparadeo</div><div><br></div><div><br></div><div>C_802-369-4458</div><div>H_802-728-3059</div><div></div></div></div></div></div></div>