... battery charger. Designed for recrestional and industrial applications, their 120-volt/230-volt, 60HZ/50HZ AC power output is ... than 3% total harmonic distortion, PROsine 1000 and 1800 inverters deliver true sine wave output that is identical to AC power ... are lighter and more compact than other inverters with similar power ratings because they use high-frequency switching technology in the power ...