OFF Grid AC Coupled Fronius w/ Multi - very low optimization

DIY
, , , , ,
1

Resolved - I needed to turn off second MPPT Tracker (I’m using one string only) and required Fronius Access Code to unit to access setting. I phoned Fronius Technical Help and they were very helpful and considerate. All sorted…Thanks.

I have just installed a Fronius Primo (3.6-1 with 3.6Kw panels) , into an off grid Victron Multi 5kw, incl Cerbo. All updated to latest Firmware incl DataManager on Primo. Fronius set for MG50 and PV Inverter Support Assistant installed on Multi. All visible on VRM.
All seemed good, until I updated Datamanager via Web portal, and now Fronius only producing about 15% of possible power. Victron also producing oscillating low hum!
It does seem that the Multi is throttling the Fronius from producing its full potential, with Fronius MPPT trackers showing 70V when it should be 400v.
I followed all suggested settings for Frequency shifting - not sure where to go at moment!
Any help?

2

try rolling back the firmware in the datamanager?

3

Thanks. I don’t see previous firmware versions online.

4

image
image835×260 23.3 KB

Yes - looks like they only list the latest version - you did not mention the number, so I assume this is ti. Try contacting their service to see if it can be rolled back..

1 Like
5

Resolved - I needed to turn off second MPPT Tracker (I’m using one string only) and required Fronius Access Code to unit to access setting. I phoned Fronius Technical Help and they were very helpful and considerate. All sorted…Thanks.