I'm turning to this knowledgeable group with an issue I have: my rooftop PV system is stopping production on a semi-regular basis. To be more specific, it will start the day okay, then at some point around 11AM when the production is really ramping up, it will just stop cold and not produce any more for the day. The next day, it is like everything has been reset and things work fine. This often happens on perfectly clear days so it is not a matter of solar energy not reaching the panels. And it happens seemingly randomly; could happen once in one week, then not for 2 weeks, then happens twice in one week. One thing I have noticed, however, is that it tends to happen on (what would be) high production days - lots of sun. But it happens rarely enough that most high production days are fine.
Today it happened again and I noticed that the inverter said "Reconnection fault grid". (I don't know if it says this every time it happens but it's a good guess.) The manual doesn't say much about this, only that the country setting, or some other parameter, could be set to a value not consistent with local requirements. Doesn't help me much. I'm not familiar with all the Sunny Boy settings, but if some setting were off, the inverter probably wouldn't be working most of the time just fine. When I look at the log book on the Sunny Portal app, for example for today, there was nothing.
I have a Sunny Boy inverter and 9.6kW of LG panels on two different roof faces. There are some long wiring runs. POCO is PG&E (SF Bay Area). New 200amp elec panel. Solar PV system was installed July 2016.
I called PG&E a few weeks ago about this. They said it wouldn't be anything on their end. I need to call my installer, but I thought I'd try here to get some input, as I'm not sure my installer will know what's going on.
I've attached photos of the daily production for a few "error" days and one normal day, plus a photo of the Sunny Boy error screen from today (note that it was taken in the early evening when the sun was practically down).
Thanks for any thoughts/advice.
Today it happened again and I noticed that the inverter said "Reconnection fault grid". (I don't know if it says this every time it happens but it's a good guess.) The manual doesn't say much about this, only that the country setting, or some other parameter, could be set to a value not consistent with local requirements. Doesn't help me much. I'm not familiar with all the Sunny Boy settings, but if some setting were off, the inverter probably wouldn't be working most of the time just fine. When I look at the log book on the Sunny Portal app, for example for today, there was nothing.
I have a Sunny Boy inverter and 9.6kW of LG panels on two different roof faces. There are some long wiring runs. POCO is PG&E (SF Bay Area). New 200amp elec panel. Solar PV system was installed July 2016.
I called PG&E a few weeks ago about this. They said it wouldn't be anything on their end. I need to call my installer, but I thought I'd try here to get some input, as I'm not sure my installer will know what's going on.
I've attached photos of the daily production for a few "error" days and one normal day, plus a photo of the Sunny Boy error screen from today (note that it was taken in the early evening when the sun was practically down).
Thanks for any thoughts/advice.
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