Engel R2500IS 2500W Pure Sinewave Inverter Generator – What You Need to Know The Engel R2500IS 2500W Pure Sinewave Inverter Generator is a medium capacity, portable generator designed to provide reliable backup and mobile power for a range of situations. Promoted as offering world class quality with peace of mind from Engel’s four-year warranty and national support network, it's built for buyers needing a compact yet capable generator for home,…