Motor Startup Power Quality Solution The Equalizer-ST is a real-time high performance cost effective motor start-up solution, a single system is able to handles multiple motors. Elspec’s Equalizer-ST is a highly accurate motor start-up solution for voltage drops creating by starting large motors, reducing voltage flickering & fluctuations. The Equalizer-ST is a unique system that compensates motor start-up in real time without creating unwanted harmonics.