光储直柔（PEDF），是太阳能光伏（Photovoltaic）、储能（Energy storage）、直流配电（Direct current）、柔性交互（Flexibility）4项技术综合应用在建筑领域应用的一项新型系统性技术。通过小型（离网、并网、户用别墅、小商铺等）、中型（楼宇）、大型（园区）等不同应用场景的示范应用项目，理论结合实践，验证光储直柔系统的可行性、可靠性和经济性，助力行业加速技术迭代和成熟，同时形成YIST的自有技术能力，包括对光储直柔电器设备的评估能力和系统方案设计与集成能力。
PEDF represents a novel systematic technology ，which comprehensively integrates Photovoltaic， Energy Storage, Direct Current, and Flexibility technologies into the construction sector.Through demonstration projects in various application scenarios, including small-scale (off-grid, grid-connected, residential villas, small shops, etc.), medium-scale (buildings), and large-scale (Industrial parks), theory is combined with practice to verify the feasibility, reliability, and economics of the PEDF system. This endeavor facilitates accelerated technological iteration and maturity within the industry, at the same time, formed YIST's proprietary technical capabilities, including the evaluation of PEDF electrical equipment and the design and integration of system solutions.