Thanks for the clarification
I did not realized that you are a commercial designer.
Anyway, I am very interested in homebrew power inverter : I will appreciate if you could help in the next future !
I do have very old radio that is operated at 230 Vac 50 Hz.
I am also considering to buy new radio at 13 Vdc ... but they are very expensive to me at this moment; I would like to implement an MPPT solar panel battery charger in case I will buy new radio for Christmas !!! Could you help me in this case ?

Thanks
Ambrogio