Table 1 summarizes the performance and cost indicators for the storage portion of the system being characterized i n this report.
The 1997 30 kW baseline system is based on a commercially-available 31 kW PV/flooded lead-acid battery system. The battery subsystem is assumed to improve and transition in technology type, changing from flooded lead-acid i n 1997 and 2000 to VRLA beyond 2005. Advanced batteries are anticipated in 2020. These technology changes slo w the cost reduction path for the battery subsystem. The PCS and max power tracker are expected to be integrated, so significant cost reductions are expected as modular design and factory-assembly become the norm and productio n volumes increase substantially. The balance of plant subsystems are expected to decline in cost as one-of-a-kin d engineering and site-specific installations become less common.