While browing thru the brochure for the ElectricWest show I came across an advertisement for a product names an Energy Bank Unit manufactured by DMI Manufacturing, Inc. It guarantees to reduce your electric bill by 11-30%.

How it works: The EBU removes irregularities from the electricity supplied by the power grid. It stores energy internally until needed by any electrical device - a light, television, computer, motor, refrigerator, etc. Power factor correction to 0.99. 18-36 month payback

Any opinions ? Would this be more suited for businesses that utilize large motors ? Or is it another vodoo box ?