Main Tel. 800-882-8285  Local 713-464-8000 Technical Support Tel. - 800-772-7633 Technical Support E-mail - support@smartpowersystems.com Return Material Authorization (RMA) If for any reason you need to return the unit to us, you should obtain an RMA number before returning the unit. To request an RMA number please call 1-800-772-7633 or click here to fill out the proper form.