We don't necessarily need a 40kW inverter, that need was born from getting a great deal on panels along with having the space for it, with the ROI being very good if we do the majority of the work ourselves, along with a DIY battery bank - which we are doing.Thanks, it works great for everything I need it to now. I was glad to find that project.
I would assume the same. I highly doubt that OP needs a 40kw inverter.
I'd expect some sort of inverter to support AC loads as needed. It may or may not have an integrated charge controller. Then, multiple (or one large) charge controller for the reminder of the 40kw worth of panels.
That's a lot of PV
And now that I think about it, that's quite the unusual ratio. You'd be able to fully charge the battery in about an hour (if your battery can take a 1c charge)
I've got about 30 kWh of storage and 6kw of PV. But, I'm much closer to the equator. Maybe that's normal in Denmark.
If you're (OP) just looking for the PV inverter now and not doing the battery right away that changes the equation for me. I don't know if any all in ones that would operate without the battery, so you're probably stuck with a standard grid tie PV inverter until you add storage.
As mentioned, I think we've decided to go with an MPPT RS 450/200 from Victron to supply batteries and then two Fronius Symo 20kW, might even go down to the 17's as some of the PV is going into the Victron anyway.
The all in ones are simply not worth it and too small/expensive compared to my current selection of gear.
Battery is ordered and on its way
But you are right, this is probably a very unusual size solution for residential, hence it being so damn hard to actually obtain data from vendors.
Even my own power company had a hard time answering what forms I should fill out as they had special rules for plants bigger than 11kW