Bangji rooftop photovoltaic energy storage enterprise

Safe operation and system performance optimization. TU Energy Storage Technology (Shanghai) Co., Ltd., founded in 2017, is a high-tech enterprise specializing in the research and development, production and sales of energy storage battery management systems (BMS) and photovoltaic inverters.

Compared with the cities in the same latitude belt, Guiyang has a poorer photovoltaic potential, and a single electricity price system is applied to low-capacity users, resulting in low electricity prices, which leads to low profits. Building rooftop photovoltaic systems for user self-consumption is difficult to recoup the returns.

For cities with rich solar energy resources (such as Mohe), rooftop PV systems can yield substantial benefits, even under high shading. However, in cities like Urumqi, despite having ample solar energy resources, the on-grid electricity prices are relatively low, leading to much lower investment returns and longer investment payback periods.

Shi, M. et al. Opportunity of rooftop solar photovoltaic as a cost-effective and environment-friendly power source in megacities. iScience 25, 104890 (2022). Margolis, R., Gagnon, P., Melius, J., Phillips, C. & Elmore, R. Using GIS-based methods and lidar data to estimate rooftop solar technical potential in US cities. Environ. Res.

The study revealed that areas with abundant solar energy resources and higher electricity prices have a lower economic risk for rooftop PV system construction under the current subsidy price and cost. This finding provides valuable insights and serves as a reference for constructing rooftop PV systems in different regions of China.

This study moves beyond technical estimates to assess the deployable rooftop solar potential across 367 Chinese cities, factoring in real-world constraints. The findings offer actionable insights to guide strategic deployment and support China's ambitious solar energy goals.