It's worth noting that the search for "AC01C" across public domains yields results related to other industries (like medical air compressors), suggesting that this specific model may be less common in general distribution or perhaps an older iteration of the AC01 platform that has since been superseded by newer models.
Modern gensets are often unmanned. The Pramac AC 01 supports multiple remote protocols: pramac ac 01 generator monitor control system ac01 mp ac01c