Industrial parks play a critical role in achieving national carbon neutrality targets. Rooftop photovoltaic application represents an effective mitigation option, but its deployment is often limited by curtailment. This study evaluates the synergies of photovoltaic generation combined with energy storage, surplus-to-grid export, and distributed power trading to enhance carbon reduction in industrial building clusters. Hourly electricity data and solar generation potential are obtained for multiple industrial buildings in a Chinese industrial park. A mixed-integer linear programming model is developed to optimize annual operational outcomes under nine scenarios. The results indicate that deploying storage, surplus export, or contract-based distributed trading individually can alleviate photovoltaic curtailment and achieve 40-60% emission reductions. Integrating all measures achieves the highest cost savings and enables near-zero-carbon electricity consumption, with solar generation fully consumed and photovoltaic share in electricity consumption reaching 84%. However, the zero-carbon scenario highlights that eliminating the final fraction of emissions requires disproportionately high costs, calling for additional efforts. These findings demonstrate a practical pathway to promote photovoltaic development and local consumption of industrial parks, while supportive policies remain essential.

industrial park; rooftop photovoltaics; distributed trading; energy policy