There are no 50 volt panels but you can get a controller or transformer to step 12v up to 48 or 60 easily, and that's way less loss than going through an inverter. Then it's DC-DC charging your batter.There is more to it than dividing and use of arithmetic. As I live off grid and get all my power from photovoltaic panels. Unless pointed at the Sun they don't produce at maximum rated power. Then all chargers and any inverters you might require have losses,nothing is 100% efficient. There are no 50+volt panels so you will need a charger. The charger will most likely be a 110v charger. Fortunately you will most likely not need a pure sine wave inverter(read expensive). A "modified" inverter will probably work fine. The panels are not too much nor are modified inverters. $250 for a panel maybe $80 for the inverter. The charger is up to you. I hope this helps a little. PS: winter and rain will kill productivity. Especially rain.
The mppt controllers ain't cheap but they are great for voltage variations. That $80 inverter doesn't apply to mppt. Look before you leap.