All diesel gensets in our generator range above 10kW are 1500rpm machines, which are designed for use as both backup and prime power. 1500rpm generators are more durable and reliable than 3000rpm generators due to the engines revving at half the speed, meaning they are able to run for longer with less wear and tear. Starting at 11kVA and going all the way up to 120kVA, these generators are ideal for both backup or mains supply power use in off-grid homes, offices, worksites and commercial buildings.