Yes you can plug in another x6 icharger. But remember that ichargers need a 24volt power supply in order for you to get full power out of them. The icharger x6 with a 12 volt power supply only has about 400 watts of usable power when is enough for the rated 30 amp charge rate for 2s lipos but is not enough to charge 4s or 6s lipos at 30amps.