As of 2017, the SIVA 250/50 has been certified to IEC 61400-22 with a conformity statement from DNV-GL. Agricultural as well as commercial and industrial consumers with large demand charges can most effectively offset on-site generation. These users typically need every bit of their land for their primary functions and often see wind speeds in the 5.5 to 6.5 m/s range at hub height with minimal turbulence. They are also subject to specific capacity (kW) restrictions for back feeding. Understanding this need to maximize energy (kWh) generation per kW injected into the distribution system, SPA started research on longer blades for the SIVA 250/50 turbine in 2020. In 2021, SPA proposed and was awarded NREL Competitiveness Improvement Project (CIP) funding to redesign, build, and structurally test new prototype blades now 14.4 m in length. This will allow for better power control and stall behavior at rated power and lower sound levels. The new SIVA 250/50 with these improved blades is expected to improve annual energy production by 15% over the 30 m rotor while reducing LCOE by more than 18%. The new design will allow the rotor diameter to be extended up to 35 m, making the system ideal for Class III wind sites and allowing for improved energy production at sites with lower wind resources. The prototype blades were produced and are currently being tested per IEC 61400-23 standards NREL’s National Wind Technology Center in Colorado.