So, if the power output from the renewable source begins to drop, the controller automatically starts the gen-sets to ensure no drop in energy production from the system. The Dynamic Spinning Reserve function allows the controller to adjust the output from the gen-sets according to the output of the renewable source.It continuously monitors data from all sources of energy including solar, wind, gen-sets and batteries. InteliSys NTC Hybrid is a controller for applications that combine gen-sets with a renewable source of power.