<p>What brand of CC please? Sorry if I missed it...--Dave</p>
<pre><strong><span>Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" target="_blank">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
<p>On Tue, 14 Jan 2020 19:51:18 -0700, Ray <ray@solarray.com> wrote:</p>
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<p>If there is any current flow between DC negative and ground anywhere in the system, it will trip. I would check the dryer for a ground fault, and I would check the system to make sure Neutral is not bonded to ground in more than one place (very common). Most importantly, I would make sure that negative is not bonded anywhere except at the DC GFI in the controller. </p>
<p>My guess is that DC is bonded at the negative shunt as is normal with many DC load centers, and that the dryer is a big enough load that pulls enough DC amps, so that some of DC negative is flowing back through the ground. Probably doesn't trip normally, because at lower loads, less than an amp is flowing on the ground.</p>
<p>Just guessing,</p>
<pre class="moz-signature">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 1/14/20 7:03 PM, Mac Lewis wrote:</div>
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<div dir="auto">Hi wrenches,
<div dir="auto"> </div>
<div dir="auto">I've got an off grid customer that has an external PV GFI breaker in his charge controller that trips when the dryer is on. He snuck in an electric dryer uggh</div>
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<div dir="auto">However, I am curious what the mechanism might be to cause the trip. Will a ground fault on the AC side of an inverter trip a PV GFI on a charge controller?</div>
<div dir="auto"> </div>
<div dir="auto">I haven't dug too deep into this yet but maybe someone else has seen this.</div>
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<div dir="auto"> </div>
<div dir="auto">Thanks in advance for your help.</div>
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