you can get them to parallel them but one warning here make sure you get the correct phase roation line up first before you throw the switch otherwise you will destory the perfectally good generator.
I did see aftermath with wrong phase roation on the generator the damage will varies from stalling the primemover to complety fuber unit [ both primemover and generator part ] the last one i did see few months ago it actally broke the flex plate in half.
Wisconsin and Paris France
"Pas de problème, il marche n'est-ce pas?" (No problem, it works doesn't it?)