Thanks for the answer.
I will not prolong life that much as you are saying, but I still try to optimise what I can, as I don't like wasting anything if I can help it.
Few months might become even a little more so I like to plan ahead!
Ciao, anche io sono Italiano, basta contattare il supporto fox +3904 9636 7610, dare il numero seriale e lo fanno loro in remoto l'upgrade.
Ovviamente l'inverted deve essere coperto da una rete wifi e online