question

Hi @Dylan

Have you resolved this already?

if not: are you the installer or did someone else install it?

Did you check the power switch at the bottom of the unit? are you sure both are on 'I' (not 'II' that stands for 'charge only')

Basis troubleshooting steps: try every unit as stand-alone and see if any of them fault when grid is lost, try swapping master / slave, etc.

does it happen every time the grid is lost?

Hi, I have three installations with the same problem. I get a "Error 17 Phase master missing" error 50% of the time when there is a grid failure. It used to happen more often (in the case of the one site every time) but since upgrading the firmware to version (2623) 481 it is better.

All three sites are made up of 6 Multi II 5kVA units in a three phase configuration.

We cannot simulate the problem with the AC input breaker only - has to be a grid failure.

Any help will be appreciated - we sell Victron as the Rolls Royce of inverters down here and the customers are of course not happy.

We are now at the point of hiring very expensive hardware to try and catch what comes down the line when the grid goes down. Also investigating filters but it is difficult if you don't know what you are trying to smooth out.

Latest update on this Error 17 with loadshedding saga is that putting ferrite beads on all the VE-bus cables close to the ends of the cables seems to sort out the problem. Waiting for next loadshedding events to test further but so far so good. A site that always failed did not fail during the last two loadshedding events after fitting the ferrite beads.

Please let us know if this works for you as well as it will be a major win if we can solve this problem.

Hello Hannes, I keen to hear if you were ever able to resolve this issue. I have the same issue on my system.

I have a Victron system that I installed myself and initially had assistance programming it by a chap called Colin while he still worked for Specialised Battery Systems (SBS) in Benoni. He has since left and opened his own solar installation company and the folk that work there now have no idea how to help me. At the time when Colin helped me with settings, it was a single inverter but I have subsequently upgraded the system to install a second inverter with a second MPPT and 6 additional panels. I have approached Colin on several occasions for help but he is either too busy or earning too much money to bother with me. I have also approached two other installers here in my area but have had zero assistance. The current folk at SBS seem clueless and also referred me to two of their current installers, neither of which could help when I mentioned my system and its current set-up.

If you would be prepared to look at my config file to see if you pick-up any obvious errors, I can send it to you in a private message.

When I use a single inverter, I get it right but when I use the dual inverter set-up, I start to get error messages and the system shuts down with low battery warnings when loadshedding occurs. I have a feeling that the system tries to power-up the grid for a split second when this happens. I run a dual (master and slave) Multiplus II 3KVA system with dual 60/150 MPPT’s and 15 panels, 9 X 365W connected to the one MPPT and 6 X 450W to the other, both in three strings each. I have two 4.8Kwh Ritar batteries. These are connected to the Venus via a cable but I am not sure if the BMS is operational.