Welcome to Advance Power Redding, the North State's Leader in Renewable Energy Design, Installation, Service & Technical Epertise We are here to help you gain Energy Independence through a variety of conduits depending upon your needs. APR has decades of local experience in Grid - Tie/ Off - Grid Solar Design & Installation, and is at the forefront in Lithium Advanced Storage Bank Technology, offering an APR Battery with BMS of its own., Advance, There,s nothing like it. Advance Power Redding offers many services to help offset your Energy usage.