<div dir="ltr">Hi Jim,<br><div><br></div><div>I think the voltage regulator on the generator is the issue, but you may be able to fix it by trying a different AC input mode. What is the AC input mode are you using on the Radians? Are the modes the same on each Radian? Since you have a range of input that you can get it to hiccup, I'd try playing with the AC input modes through the problematic range. I tend to use support mode with the least trouble. </div><div><br></div><div>What are the downstream loads? </div><div><br></div><div>I could see perhaps how a downstream load that is large and inductive and shuts down rapidly could cause a voltage spike, but really the voltage regulator is in charge of that. </div><div><br></div><div>ANother thing to check is torque/corrosion on your connections. I like to use an IR camera to speed up looking for connection issues.</div><div><br></div><div>Let us know what you find out.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Nov 8, 2024 at 9:34 PM Jim Gowdy 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"><div dir="ltr"><div>Hi all,</div><div> I need some help with a generator overvoltage troubleshoot. I'm working on an outback offgrid system that consists of 2 x Radian GS8048a, 1 x MATE3S controller, 1 x FM 80 charge controller, 1 x 55kw cummins generator, about 4kw of solar *not sufficient enough to keep up with the load, and 24 x 4v Rolls batteries series/paralleled to make 48v. The generator was rebuilt and the batteries replaced about a year ago and since then, the generator has been faulting due to overvoltage. I had help and first found that the MATE needed calibrating so that was done, but the generator still was faulting. I found changing the AC Input Charging from 30a to 20a seemed to work. I put a power monitor on the generator output and found that, with the AC Input Charging set at 30a, noticed that there was a voltage spike up to 300+V at about a 70a draw. The generator company put a load bank on and verified the generator may not be at fault and the problem is after the generator. Has anyone encountered a problem like this and have suggestions? </div><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div dir="ltr">Jim with Gowdy Electric<div>Cambria, Ca 93428</div><div>business 805 927 2630</div><div>cell 805 975 5279</div></div></div></div>
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</blockquote></div><br clear="all"><div><br></div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature"><div><br></div><div><font color="#305A78" face="'times new roman', serif"><br></font></div><div><br></div>Mac Lewis<br><br><span style="font-family:"Times New Roman";font-size:medium;color:rgb(255,153,0)"><b><font face="Arial, Helvetica, sans-serif" size="3"><p align="left"><font color="#000000" face="Verdana, Arial, Helvetica, sans-serif"><span style="font-size:small"><span style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font face="'times new roman', serif">"Yo solo sé que no sé nada." </font><span style="font-weight:700;color:rgb(104,104,104)"><font face="'times new roman', serif">-Sócrates</font></span></span></span></font></p></font></b></span></div>