Total Power Loss

[LDVV]

The display on my Inverter reads that no power is coming from my Array.

I took a reading at the isolating switch (Inverter side AND Array side), but there are no volts at all.

It is cloudy, but sunny here. Only moments earlier there were ~700W coming in.

I went to look for a ladder to go for a visual inspection, then I thought to take a multimeter Incase the frame is live, or something else stupid that I may overlook.

When I went back into the garage, there's suddenly power from the Array.

Fast-forward half an hour - no power again.

?

 

[LDVV]

The only thing I've messed with recently was adding an extra panel (everything well within limits).

It's been working fine for the last week.

?

 

[MisterSandals]

The only thing I've messed with recently was adding an extra panel (everything well within limits).

Mismatched MC4 connectors with new panel? Double check the connections you messed with.

 

[LDVV]

Mismatched MC4 connectors with new panel? Double check the connections you messed with.

I had two new REC panels in series. I added a third (same Brand/Model).

So, there shouldn't be any difference there...and it's been working fine for the last week (if that's of any relevance).

Once it's not so sunny, I'll have a check of the MC4's anyway.

 

[LDVV]

...and half an hour later - suddenly there's power from the Array again.

?

 

[MisterSandals]

Once it's not so sunny, I'll have a check of the MC4's anyway

Is there voltage at the EPEver when "there's no power"?

Or when there's no power, is the battery losing connection?

This would help determine if its array or SCC.

 

[LDVV]

Is there voltage at the EPEver when "there's no power"?

Or when there's no power, is the battery losing connection?

This would help determine if its array or SCC.

Everything is as normal (during power loss) - it's as though, according to the Epever display, it's night-time.

I'd taken a reading, Array side of isolating switch. Definitely nothing coming from the panels.

 

[MisterSandals]

I'd taken a reading, Array side of isolating switch. Definitely nothing coming from the panels.

99.9% chance its a connector.

 

[LDVV]

99.9% chance its a connector.

Right You are!

I couldn't see anything definitive, but one suspect looking connector (rear end was being held upwards, possibly allowing water in over time).

Anyway, I changed it, and no problems since.