The difference between the two is that BIPV has already played the role of building materials as an indispensable part of buildings, not only meeting the functional requirements of photovoltaic power generation, but also taking into account the functional requirements of buildings. It is a combination of photovoltaic products and building materials, and can replace some traditional building materials. It is designed in an integrated manner during the architectural design stage, and formed integrally with the main body of the building during construction. The components in a BAPV building are simply attached to the building through a simple support structure. After removing the photovoltaic components, the building's functionality remains intact.

BIPV将太阳能发电设备—太阳电池板设计成为各种形式的建筑装饰材料，取代玻璃幕墙、外墙装饰石材、屋顶瓦等传统建筑材料，同时作为太阳能光伏发电系统，为用电负载提供绿色、环保、清洁的电力。BIPV已经为建筑物不可分割的一部分，光伏组件起到了遮风挡雨和隔热的功能，拿开光伏组件之后，建筑将失去这些功能。

BIPV designs solar power generation equipment - solar panels - as various forms of architectural decoration materials, replacing traditional building materials such as glass curtain walls, exterior wall decorative stones, and roof tiles. It also serves as a solar photovoltaic power generation system to provide green, environmentally friendly, and clean electricity for electrical loads. BIPV has become an integral part of the building, and photovoltaic modules have functions of shielding against wind, rain, and heat insulation. After removing the photovoltaic modules, the building will lose these functions.

而BAPV不会增加建筑物的防水、遮风的性能。而且，BAPV会增加建筑负载，影响建筑的整体效果，另外，对建筑物表面来说，BAPV还存在重复建设的问题，严重浪费了建筑材料。

BAPV does not increase the waterproof and wind shielding performance of buildings. Moreover, BAPV can increase the building load and affect the overall effect of the building. In addition, for the surface of the building, BAPV also has the problem of repetitive construction, which seriously wastes building materials.

BIPV结构上应遵循“建筑材料”相关规范与技术要求，并非简单机械化地“绑在一起”，而是高度集中一体化，为“1+1=1”。而BAPV是分体式的，可分开使用，光伏组件拆解下来依然可以独立使用。

The BIPV structure should comply with the relevant specifications and technical requirements for "building materials", not simply mechanically "tied together", but highly centralized and integrated, with a value of "1+1=1". The BAPV is a split type that can be used separately, and the photovoltaic modules can still be used independently after disassembly.

光伏与建筑的结合，能够有效降低建筑用能，大力发展低碳、零碳建筑，对于节能减排、保护环境具有重要的现实意义。

The combination of photovoltaic and building can effectively reduce building energy consumption, vigorously develop low-carbon and zero carbon buildings, and has important practical significance for energy conservation, emission reduction, and environmental protection.