This guide contains a field test procedure for lead-acid batteries used in PV hybrid power systems. Battery charging parameters are discussed with respect to PV hybrid power systems. The field test procedure is intended to verify the battery's operating set points and battery performance. Discussion on how to interpret test results is also included. This guide is applicable to all PV hybrid power systems where PV and an engine generator are the only charging sources. This guide does not include stand-alone PV-only systems. This guide provides a field test and evaluation procedure for lead-acid batteries used in PV hybrid power systems. It is intended to help system owners, designers, and funding organizations to select, manage, and verify lead-acid battery performance in PV hybrid power systems. New IEEE Standard - Superseded. This guide is specifically prepared for a PV/engine generator hybrid power system, but may also be applicable to all hybrid power systems where there is at least one renewable power source, such as PV, and a dispatchable power source, such as an engine generator. Taper-charge parameters for PV hybrid systems are suggested to help in preparing the battery for a capacity test. A test procedure is provided to ensure appropriate data acquisition, battery characterization, and capacity measurements. Finally, a process to review test results and make appropriate decisions regarding the battery is provided. No cycle-life predictions are made.