How many devices can the Power 550 charge at once?

The Power 550 can charge many devices. Up to 8 ports on the Power 550 can be used at once. Three ports can be used from the USB section at the same time (The USB-C and USB QC 3.0 Port cannot both be used concurrently). All three DC output ports can be used at the same time as long as the total draw does not exceed 12 Amps, and both 110V AC outlets can be used at the same time as long as the draw stays below 600 Watts. You can plug a power strip into one of the AC outlets to power even more devices if desired.