Purchased in early May 2022, to replace the Phoenix 12/800 Watt.
First of all, I want to emphasize that I now prefer 24V systems for many reasons that I don't need to mention here.
IMPORTANT!!! Even though I have the CERBO GX, not all settings of the Multiplus are accessible.
You ABSOLUTELY NEED the MK3-USB (VE.Bus to USB). So keep in mind the additional cost.
edit: otherwise you can download the settings file, make changes, and re-upload it. It's a bit to very annoying/difficult.

I have not regretted the purchase at all.
Very low self-consumption power, a sign of build quality.
It is a low-frequency inverter which means reliability and durability over time.
And I definitely have a stable 230V voltage.
Unlike the public grid (DEI) which starts at 226 and goes up to 241V depending on the time of day.
So all my devices are "happy".

I have constant consumption of 250 watts and have reached a peak so far of 2,150 watts.
Two 12,000 BTU air conditioners run day and night without the slightest problem.
Of course, set at 24-25 degrees temperature.

I have it set so that if the voltage drops below 24.20V, the charger from the socket turns on,
which is set at a maximum current of 4A to draw from the grid.

My advice is not to be stingy and get another brand or a smaller one.
If you intend to power the house (not all of it), start with at least the 3KVA.
Also, if you plan to invest in large batteries, then look at the Phoenix for something more economical.
I went with the Multiplus because I have 12KWh of batteries.

Finally, now with the June heat, above 600-700 watt consumption the fan starts.
You can hear it, but it's nothing annoying.

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UPDATE: AFTER ABOUT 2 YEARS...!!!

The inverter continues relentlessly as if it were its first day. Absolutely no problems.
The only thing that saddens me is that prices have dropped a lot...
Especially at 48V, you can find Multiplus II 3,000 KVA from €820???!!!!
and the 5,000 KVA from €1,285???!!!!

Other than that... for a fully autonomous system, I continue to support Victron.

For a system with grid assistance... I think it will be more economical with Growatt or Deye.

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UPDATE: AFTER ABOUT 3.5 YEARS...!!!

The only thing I regret is that I DID NOT get the bigger 5KVA model in 2022.
Today I am STILL SUPER satisfied.
I have now put THE WHOLE HOUSE on the 3KVA Victron.
I did AC-COUPLING with 2 Hoymiles, 1,800 watts each.
3,600 watts of additional production and together with the Victron I can run very large loads during the day.

We do cooking - ironing - vacuuming during the day when we have excess energy.
If the batteries are full, then in the summer all air conditioners that are off automatically start to take advantage of the excess energy.

And at night with the 15KWh LiFePo4 we are more than covered.

Of course, it needs to be checked from time to time or some compromises made, as I started with a small system.

Today if I were to build it, I would get the big 10 or 15KVA Victron and of course at 48V.
The 12V and 24V are for learning about photovoltaics. Not for quitting the grid.