Victron smart meter with Fronius AC coupled system

DIY
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1

I have a system with the following components I will be assembling:

  • Grid tied Fronius Primo 5 with 14 panels
  • Fronius TS100A smart meter
  • Victron Multiplus 6k5
  • Victron solar charger with 4 panels
  • 2 x Pylontech Fidus Pro 5 kwh
  • Victron Cerbo

Will I need a smart meter to see grid exported energy? If so, should that be a victron smart meter or a fronius smart meter? Or doesn’t it matter? Or will the cerbo+ multiplus be able to give me the information?

Maybe I need both smart meters (Fornius + Victron)?
Best regards, Andy

2

Depends how your Fronius is wired.

  1. If it is wired on AC OUT 1 i.e. ’ behind’ the Multiplus (looking from the grid side) - no meters are required. As all the Power from/to the GRID must flow via Multiplus, it it will use its internal meters

  2. If wired on AC IN side i.e in front of the Multiplus (looking from the grid side) - you need, indeed, the meter.
    I believe it’s better to have a Victron one as it needs to be communicated with Cerbo GX (which will supervise net grid in/out power flow)

3

Thanks SebC - makes sense what you say in hindsight. From the documentation I could find, I always thought the Fronius had to be on the Multiplus AC out. Thank you!