i own an electric scooter which is a 250 Watt motor and has a 48V 24Ah battery so 1KWH. this gives me about 50 Km for one charge. on this scooter, i put over 22

i own an electric scooter which is a 250 Watt motor and has a 48V 24Ah battery so 1KWH. this gives me about 50 Km for one charge. on this scooter, i put over 220 KG of load and it runs so there should be no problems putting two of those motors in a three wheel design. about power, i am sure this is just for "topping up" the battery because one can have a battery bank at home which charges from sun which can be swapped for next day. that way you can put even a 330 watt panel and that should charge this system during the entire day. then you have to account for cloudy days and such so maybe bump the solar up so if you put something like 500 Watts or more with a second battery pack of 2+ Kwh, that should be comfortable