A variable speed AC generator, like for instance a Dynawatt or a Dometic Travelpower generator, will produce a

constant voltage of 230VAC when mounted to the engine of a vehicle or boat. Due to a DC-AC converter

mounted to the generator both value and frequency of the generated voltage are (within limits) independent of

the engine's speed. A major drawback using this concept is that the power output of these units depends on the

engine's speed. In case the engine is running idle or at low speed , the alternator just does not generate power

switched on while the engine is at low speed, there just may not be enough power available.

Due to the resulting power shortage, these alternator systems may stall or even get damaged beyond repair.

Another issue within mobile applications is the charging of the DC battery in case the original DC alternator was

replaced by an AC alternator. One would then need additional equipment to provide solid DC power to charge

the vehicle's battery and/or feed other DC loads aboard. This equipment will draw power from the AC alternator

as well and using such equipment will therefore have a negative effect on the alternators performance.