Sunnyboy Configuration

[Slindy]

I self installed my system in March. Here was the initial configuration:

SolarCity H6 Inverter
String 1: 13x 280w SolarWorld
String 2: 13x 280w SolarWorld
The panels were used.
All mounted on same slope with Tigo TS4-A-O DC optimizers.

With full sun (in March), the power would max out around 6350w DC / 6000w AC for about 2-3 hours. Pretty much as expected. The system was limited by the inverter. The max power was achieved at about 375-400v dc per string (or about 29-31v/panel per the Tigos).




After about 11 days, the SolarCity H6 stopped working and was replaced by a SunnyBoy 7.7.

Now, the power barely hits 6kw DC in full sun.


Also notice how much lower the voltage is 26v.



But here is the strange part... if there is broken clouds, it will often spike to over 7500w.



I also noticed that the voltage is much higher here too, around 28-29v.



Are there settings in the SunnyBoy that I am missing? I have tried enabling and disabling shadefix. That doesnt do anything. I havent tried constant voltage, but Im not sure that is the right answer either. I dont think there is anything in the Tigos that is adjustable. The temperature is higher now, but only by about 7-8 deg F.

Any thoughts?

 

[Slindy]

Any thoughts? Been on the line with SMA support, but we still haven't cracked this nut yet.

 

[MisterSandals]

@Hedges is the resident Sunnyboy expert. Hopefully this incantation will summon him.

 

[Solarisium]

Any thoughts? Been on the line with SMA support, but we still haven't cracked this nut yet.

Any update on this?

 

[hwy17]

But here is the strange part... if there is broken clouds, it will often spike to over 7500w.

Cloud edging.