Section2.4 Facility Service Warranty. During the Warranty Period, Operator shall perform the services to the Bloom Systems and the BOF necessary for the Portfolio to perform to the Warranty Specifications and the Performance Standards and the BOF will not cause the Portfolio to fail to perform in accordance with the Warranty Specifications (the Facility Service Warranty). In the event that Owner desires Operator to service the Bloom Systems and the BOF beyond the Warranty Period, the rate for such time-based services will be quoted by Operator to Owner quarterly for the following quarter, and materials will be invoiced at the retail prices for such materials.