ERMU offers rebates for equipment or services not covered by the listed “prescriptive” rebates referenced on this web page. All custom grants must be pre-approved before the equipment is purchased and installed. Custom rebates can be applied to equipment or process improvements that save energy. The process improvements require that the same or more products are produced using less electricity to produce them. The energy savings for custom grants can be obtained using data logging of the new equipment or it can be calculated using engineering specifications that have been approved by a professional engineer currently licensed in Minnesota.