Sinewave Notch During AC Coupling – Choke Saturation?

Author	Message
jony787 Newbie Joined: 07/01/2025 Location: Puerto Rico Posts: 7	Posted: 03:35pm 28 Jul 2025         analog8484 said   Glad to see the progress and nice build. Thanks for that analog8484. I'm glad to having working. Quick update: An Enphase Field Applications Engineer reached out and confirmed my current grid profile has anti-islanding disabled. I was also chasing low-power light flicker. Enphase said they’d addressed that a few years back and suggested I temporarily reduce the number of micros to see if the issue was on their side or mine. The flicker ended up being my modulation control. Swapping in new chokes helped too—definite improvement.   analog8484 said   The power stage reminds me a bit of Power Jack inverters. Because it is .   analog8484 said   If you do get Enphase to give you a grid profile then please share the name. I am curious if they have created new/better grid profiles for off-grid AC coupling since I looked at it in detail. Grid profile I’m using: **Off-Grid FW60 PEL6000** (with a 6 kW export limit I requested as a secondary cap against my inverter). They also have the same profile without the limit: **Off-Grid FW60**. Edited 2025-07-29 01:41 by jony787