The current rating for the mep-004a is 52 amps @ 120/208 volts 3 phase, and 26 amps @ 240/416 volts 3 phase.
Keep in mind that these gen-sets do not have a reconnection switch and are meant to be strictly 3 phase units ( not single phase in the conventional sense of having 240 volts phase to phase with a center tap neutral, on the 240/416 setting you would have 240 volts phase to neutral ), however I can't imagine why you couldn't reconfigure the load panel a little bit and get 120/240 single phase out of it. After all, it is a 12 lead gen head just like the rest of them, the only problem I can see would be with the metering on the main panel. To monitor the single phase connections on the mep -002a and 003a gennys you need to select voltage and current monitoring for the different lines (L0, L1, L2 or L3). Maybe, possibly the voltage regulator might cause an issue, does anybody else out there have any thoughts????