The panel was running okay yesterday afternoon, looks like Enphase pushed a firmware update…I’ll keep watch.
Here’s an event chronology (skipping dups and secondary effects (e.g.,
DC to low during a reset)):
Sat Sep 19
11:13 AM EDT Starting download of parm0, part number 540-00142-r01-v04.20.03
11:16 AM EDT Completed download of parm0, part number 540-00142-r01-v04.20.03
<…microinverter reboot messages…>
11:20 AM EDT Commanded Reset
11:23 AM EDT High Skip Rate
<… not sure what this is, sounds like microinverter-grid sync issue?>
11:36 AM EDT Starting download of procload, part number 520-00082-r01-v04.20.03
<…11:40 last time external software recorded 0 watts from one of the panels…>
11:41 AM EDT Completed download of procload, part number 520-00082-r01-v04.20.03
11:44 AM EDT Commanded Reset
11:48 AM EDT Grid Instability: Set <occurs on panel with problem>
11:51 AM EDT Grid Instability: Clear
04:06 PM EDT Grid Instability: Set <occurs on different panel>
04:11 PM EDT Grid Instability: Clear
The system Envoy S/W: D6.0.86 (c77974), 9/3/20 build
This
thread suggests the
High Skip Rate might be heat related. This
thread suggests it has to do with the microinverter synchronizing to the grid and associated with large power drops...sounds like the problem... but this event didn't occur on the problematic panel. Interesting... the panels are just starting to wake up and I'm seeing a bunch of Skip messages with this software load that weren't in yesterday's information.
The
Grid Instability seems odd. If the actual grid were unstable I'd expect all the microinverters to send messages. I saw a redit
thread where it might be a wiring issue, doesn't seem to be consistent with a single panel though.
The
monitoring software currently ignores events, but I'm wondering if it wouldn't make sense to send alerts when a pattern develops. Possibly as I get smarter about what patterns to look for it'll become more evident.