Hello
I am french .
Sorry for my English!
I am a user of Voltronic Axpert 5kva in Alicante Spain with a house completely autonomus in electricity
I had big problems of error 51 with electricity cut everyday
To day a technician came to solve the problem.
I wait to see if it's effective, and i will say to you the result
Have you again problem of this error .
Friendly
Gérard