No, 60 watts doesn't mean the battery car is fully charged. In fact, the charging power and capacity of the battery car are two different concepts. The charging power refers to the output power of the charging device, while the capacity refers to the stored power of the battery.
Assuming that the battery capacity of the battery car is 60v20ah, then its power capacity is P=UI=60*20=1200wh=1.2kwh(degrees). The actual charge is generally 1.05 times the ideal discharge. Therefore, in the case of full charge, float for an hour or two, so that the battery gives full play to its performance, and the charging time is determined according to the battery capacity of the electric vehicle. Therefore, it is impossible to tell whether the battery car is fully charged by only 60 watts of charging power.
The charging power of 60 watts means that the battery car is being charged at this speed, but it cannot simply be said that it is fully charged. Generally speaking, the state of full charge of the battery car is calculated according to the capacity of the battery and the power of the charger. If the battery capacity is small, then a charge of 60 watts may be enough to fully fill the battery, but if the battery capacity is larger, a higher charge power is required to complete the charge. Therefore, it is necessary to determine whether it is fully charged according to the specific battery car model and battery capacity.