Subaru presents its line of conventional generators, constructed to handle the rugged demands of contractors. The RGX2900, RGX3600, RGX4800 and RGX4800E models use Subaru EX series overhead cam engines, with maximum outputs ranging between 2,900 and 4,800 watts. The RGV6100, RGV6100E, RGV7500, RGV7500E, RGV12100 and RGV13100T use Subaru EH series overhead valve engines. Maximum outputs for the RGV line range from 5,800 to 13,000 watts. An automatic idle control comes standard on most conventional models to lower the engine speed when no electrical power is needed, which lessens fuel consumption while minimizing noise. Sound-suppressing air cleaners paired with an extra-large muffler also contribute to quieter operation.