[RE-wrenches] Need a hand with Sunny Island/Sunny boy AC couple

[William Miller]

Friends:

I’m kinda stuck on a project setting up a SI/SB AC coupled system off grid.
When the SB inverters ramp up the battery voltage jumps to 69 pretty
quickly and the system shuts off.

I checked the mini-grid frequency and it does ramp up to about 62+ but
apparently not soon enough to curtail charging. I shut off the SBs for now
and we can rely on generator.

Any advice via email or a phone call would be appreciated.  SMA can be less
than helpful, especially for systems with lithium batteries.

Thanks in advance.

William Miller
Miller Solar.com
805-438-5600
www.millersolar.com
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