Yes.
I hope not.
Let's just say that I'm handy with reverse engineering.
There used to be, and it was very convenient. Alas, the arrival of the clone makers made it much harder to get firmware updates. But sometimes you just need them, and if so, you have to ask your supplier. End users need not contact Voltronic Power directly.
You have to ask whoever sold you the inverter-charger. They in turn contact Voltronic Power if they deem it important enough. It can be a slow process.
Greetings to Austria, from Australia 🙂