Mr-Sandman
Solar Enthusiast
- Joined
- Dec 28, 2021
- Messages
- 351
I have a Sunny Boy 7.7 that I'm AC coupling thru a Schneider XW Pro 6848.
While testing how the AC Coupling works during a grid failure, it performs well up until the point where the batteries are getting full and the XW PRO starts raising frequency. The Sunny Boy does engage active power limits and curtails generation.
The XW Pro moves the frequency slowly and the Sunny Boy doesn't seem to curtail fast enough, causing excessive voltage on the DC side. Seem like maybe the Sunny Boy needs to be more sensitive to the frequency shifts.
Another thing is it seems to only curtail about 50% of the output before the frequency gets high enough to cause the sunny boy to trip. I would like to make them get along a little better. Right now they are set to Rule 21 specs. Any suggestion on my settings for this?
The Sunny Boy's are awesome inverters with a LOT of fine tuning control, but good luck finding any good explanation of what the settings does or how to set anything.
Current Sunny Boy settings:
While testing how the AC Coupling works during a grid failure, it performs well up until the point where the batteries are getting full and the XW PRO starts raising frequency. The Sunny Boy does engage active power limits and curtails generation.
The XW Pro moves the frequency slowly and the Sunny Boy doesn't seem to curtail fast enough, causing excessive voltage on the DC side. Seem like maybe the Sunny Boy needs to be more sensitive to the frequency shifts.
Another thing is it seems to only curtail about 50% of the output before the frequency gets high enough to cause the sunny boy to trip. I would like to make them get along a little better. Right now they are set to Rule 21 specs. Any suggestion on my settings for this?
The Sunny Boy's are awesome inverters with a LOT of fine tuning control, but good luck finding any good explanation of what the settings does or how to set anything.
Current Sunny Boy settings:
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