Final answer:
The oldest type of RV converter utilizes DC to AC power conversion, also known as inverter technology.
Step-by-step explanation:
The oldest type of RV converter typically utilizes a 12-volt DC power source to convert it into 120-volt AC power suitable for running appliances inside the RV. This type of power conversion is known as DC to AC power conversion, or commonly referred to as inverter technology. The inverter technology allows RV owners to use their appliances and electronics while not hooked up to shore power or a generator, providing a convenient power source on the go.