Aiming at the problem of high energy consumption and low energy efficiency of commercial buildings in summer

energy-saving renovation schemes with rooftop photovoltaic and different energy storage equipment are proposed. Firstly

the mathematical models of several core equipment to be used in the renovation of the refrigeration system are established

including photovoltaic modules

refrigeration units

batteries and ice thermal storage. Secondly

the mixed-integer linear programming（MILP）model with economic objectives is established. Thirdly

the typical daily electricity and cooling load data of commercial buildings in summer are used to optimize the configuration of the three energy - saving renovation schemes. Finally

the energy - saving renovation schemes are optimized. The results of the three schemes are compared and analyzed which show that the economic efficiency of the system will be greatly improved by the configuration of photovoltaic hybrid energy storage in commercial buildings. And the results provide theoretical and data support for the selection of energy - saving renovation schemes of commercial buildings.