... tested for reliability under every condition, providing years of maintenance-free operation.Previously, a dedicated grid- ... specifications, it was difficult to meet every one of them. RDM-5000F's technology has solved ... (27.9 mph), the system reaches constant rotation of 1,280 rpm and keep it steadily till ... deliver its peak power of 5 kW. Beyond that point, RDM-5000F shifts rotation down to 600 rpm, ...