G PHYSICS
G05 CONTROLLING; REGULATING
G05B CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
G05B2219/00 Program-control systems
G05B2219/26 Pc applications
G05B2219/2639 Energy management, use maximum of cheap power, keep peak load low