[RE-wrenches] Intermittent

[Howie Michaelson]

Hilton,
Can you give more details about the inverter? And when the DC was reading 0
volts, did you try turning off the disconnect at the array to see if
isolating it from the inverter, it would show voltage?
Howie

*Howie Michaelson**Sun Catcher*

*NABCEP Certified Solar PV Installer™*

*Solar Electric Systems Sales & Service802-272-0004*


On Thu, Mar 16, 2023 at 5:15 PM Hilton Dier via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Hello Wrenches
>
> Here’s a classic problem for you. I installed an array of 11 Trina 380s on
> a ground mount, commissioned January 6 of this year. It worked fine for a
> while, but in the last week it has had an intermittent power problem.
>
> For example, this morning it was putting out zero watts at the inverter. I
> measured voltage at the disconnect at the array and got zero volts. I
> checked all the connections and wires and it all seemed solid. I had to
> leave so I couldn’t start isolating modules. I came back this afternoon and
> it was producing an appropriate amount of power for the light conditions.
>
> What’s the most obvious thing that could be going on? Some kind of micro
> crack and thermal expansion?
>
> Thanks,
>
> Hilton Dier III
> Renewable Energy Design
> Missisquoi River Hydro LLC
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