Hello, I currently have a grid-tied solar system using Hoymiles microinverters (AC-coupled). I’m considering installing a Victron MultiPlus-II with batteries to add backup capability and possibly operate in off-grid (island) mode during grid outages. My question is: :orange_circle: Can Hoymiles m…

Yes, [image] Micro Inverter plus Victron 3 Phase System Q&A and troubleshooting Dear community, since yesterday (01.11.2024) I added to my off-grid 3 phase (230V europe) system: 3 multiplus II (48/5000/70-50) 11.4kW (peak) panels connected to Victron SmartSolar MPPT RS…

Yes, they do. But they are not ideal, when it comes down to throttling through frequency shifting, iirc they won’t go bellow 50% power, but rather shut off to 0 then.

@dognose - can you tell more about it? I haven;t heard about this issue - that Hoymiles microinverters can’t gradually go down to zero via frequency shifting. If they can go only to 50% and then shut down then it is a real flaw.

Hello Bogi, I have no idea how to measure this. But as a hint my frequency yesterday. (Pure sunshine):slight_smile: [IMG_9038] You see very nicely our tree :face_with_hand_over_mouth: Now the part with frequency shift enlarged: [IMG_9040] May be this helps you. System setup in my profile. H…

Thanks Marc. Maybe they also implemented rate-of-change monitoring. I can see the moment Victrons raised freq in big step Hoymiles reacted immediately and shut down. Wondering what will happen if frequency keeps increasing gradually, with no step changes.

Will Hoymiles microinverters work in off-grid mode with a MultiPlus-II?

DIY

Marc_HD (Marc) 2 May 2025 10:19 2

Yes,

Have Fun

Marc

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Will Hoymiles microinverters work in off-grid mode with a MultiPlus-II?

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