Capacity configuration of distributed photovoltaic and battery system for office buildings considering uncertainties

•Uncertainty-based multi-objective optimal design method of PVB system was proposed.•Three groups of influencing factors with uncertainty were identified and modeled.•Representative values of technical indicators (SCR and SSR) were defined.•Generic configuration indices of PV and battery capacities were proposed.•The proposed indices can be used directly as guide for PVB system design.