Any ideas why I'm seeing big drops in production?

[charlesj]

When my graph looked like that, it ended up being a lost string of panels. The difference in mine is, it looked just like that, and production never returned to previous levels. I had noticed my production seemed low, and I went looking through the data on the tesla app for previous months, previous years etc.

After a bit of digging, I was able to find the date that my production dropped. It looked exactly like that graph, but as I mentioned it never returned back to previous levels.

Tesla came out and found a wire that was too taunt that had slightly pulled out of its connection, over time. The tech they sent out was a repair tech, and he repaired the connection. He then told me that they needed to retrofit some other connections on my roof, and he was gonna put in a ticket for that.

Since my production returned to normal after he fixed the wire, I just said "sure, no problem". Like 2 months later, I got a call from scheduling for the solar / PV install crew to come out. They showed up about 2 days from that call I received, and replaced some connection on every panel thats on my roof (I have 34 panels but they are like 250w or something).

Anyway, that definitely looks like a physical issue. Hope you get it resolved.

That is also interesting. If I understand your explanation never returning to normal, wire pulled out of connector.
His seems to come at different days, not day in, day ou if I understood him.
I would think he has the same issue but cable somehow returns to normal?

 

[jjrandorin]

That is also interesting. If I understand your explanation never returning to normal, wire pulled out of connector.
His seems to come at different days, not day in, day ou if I understood him.
I would think he has the same issue but cable somehow returns to normal?

Perhaps its flexing or something? I just remember the graph looking exactly like the one I quoted, when I tracked down the day my production dropped.

 

[JSNH1919]

What type/brand of potting compound did you use?

BG

I used Tough-Seal 21 by Key Polymer 17 Shepard St. Lawrence, MA 01843 phone 1-978-683-9411.
It might be overkill but its what we use at work for potting wiring in sewer manholes. I knew it would work. It is a duplex tube and I was able to used the company duplex applicator gun that uses a static mixing tube. There are others out there. Mc Master Carr would be a good company to look at.

 

[Shygar]

What's weird in my case is some days it is normal. Here's yesterday and Sunday. When it is working I see PV2 on the inverter shows voltage and amps even with low sunlight.

 

[Shygar]

So I got an email saying they are escalating to Delta service and I got a notification in the app to schedule service, so hopefully they figured out what is wrong.

 

[charlesj]

So I got an email saying they are escalating to Delta service and I got a notification in the app to schedule service, so hopefully they figured out what is wrong.

Let us know of the issue causing this graph as it is not rare, it seems.
And, whatever the problem, it seems this happens about the same time for people, close enough.