Grid noise forcibly shuts down my two systems

[oregon_phil]

solarintexas , Additional searching on other forums regarding Enphase power glitches:

"Without the Envoy, they will just run at whatever settings they had before, and will make power and push to the grid. But if they are in the wrong grid code or had an old firmware, you won't be able to correct it."

"BEWARE: Enphase IQ7A micros may have misbehaving firmware that needs updating". IQ7+ 520-00082-r01-v04.27.04/10 firmware has known as 'Grid Instability' + 'No Grid Profile' error.
and, issues are improved (solved) for some case at firmware version 520-00082-r01-v04.28.07/03.

It seems like you need the Envoy to even figure out what firmware version is loaded on your microinverters.

[J.P.M.]

It is my impression that OP installed Enphase system himself about a year ago with SMA system running flawlessly until then.

So he did. I missed that from the prior tread.

[oregon_phil]

It is my impression that OP installed Enphase system himself about a year ago with SMA system running flawlessly until then.

[J.P.M.]

Since they're still under warranty,I'd start by calling the vendors who installed the systems.

[oregon_phil]

1) I would disable the Enphase system and run the SMA system by itself to see if the 1501 fault still occurs during startup in the morning. 1501 fault happens when "Grid frequency or grid voltage is outside the permissible range for reconnection to the utility grid". Grid could be Grid or Grid could be Grid + Enphase. What model SMA inverter do you have? Do you have the SMA web browser interface to see AC line variables?

[solarintexas]

I posted about a problem I had with one of my two systems back last fall:
https://www.solarpaneltalk.com/forum...pparent-reason

The suspicion was that perhaps moisture had gotten into the cable connections.Turns out this is most likely not the case at all.

Here is my recent story:

1.) I have two solar arrays on my roof that are independent of each other. Array #1 is 4.5kW with an eight year old SunnyBoy 4kW string inverter. Array #2 is a 1.4kW array with one year old
Enphase IQ7+ micros.

2.) In the morning at 6.45am both systems are forced to shut down and remain locked out. My SMA Sunny Boy displays error code 1501 "reconnection fault grid". Once I disconnect and reconnect it, it starts up normally and produces as usual with no more interruptions during the day.

3.) My four IQ7+ micros, however, remain locked out during the day. They start producing again in the late afternoon. Since I only have four micros, I never got the Envoy unit, thus cannot do a readout. Manually cycling AC power to them will not help. I scoured the manual, and it does not give a good description of fault codes and how the inverters specifically respond to grid connection failures and what the lockout patterns are. I could not find any information in their technical literature at all, unfortunately.

I assume that grid noise/inconsistency happens to an extent that the inverters give up connecting and activate a lockout pattern that requires manual resetting. Very frustrating. It's only been three days in a row that this has been happening, but I am frustrated.

What would you do?
1.) Call the transmission company and lodge a complaint?
2.) Call SMA to perhaps increase the range of acceptable grid input on my string inverter?
3.) What to do about the four IQ7+ micros? Buying an Envoy is not a good monetary investment on this small array. Is there another way to access those?