The techno-economic analysis investigates first the impact of tilt angle and orientation on the production profile of a rooftop solar generator and the related performance of a photovoltaic battery storage system for single family houses at a specific location in Germany. Then, a technical comparison to a different location in Almeria in Spain is performed.

The calculations are model-based and take into consideration the consumer load profile, technical and economic photovoltaic battery storage system parameters as well as the framework of regulations for the case of Germany. The parameters “share of self-consumption”, “degree of autarky”, and “economic efficiency in terms of levelized cost of electricity” make up the focus of the modelling results. It is concluded that self-consumption and degree of autarky are strongly and inversely related. In terms of system design, a trade-off has to be made between aiming for high self-consumption and a high degree of autarky.

Key findings from the modelling results reveal that in Lindenberg in Germany, a south orientation gives the highest degree of autarky and the lowest levelized cost of electricity, but with the lowest share of self-consumption as well. For rooftops oriented towards east/west, an interesting possibility could be to split the total installed capacity (equally) between the two orientations. This makes it possible to benefit from the high self-consumption of the east orientation and the high degree of autarky of the west orientation. In general, it has to be considered that the optimum orientation strongly depends on the consumer load profile. The technical analysis shows that changing the location to Almeria increases degree of autarky and decreases share of self-consumption for south orientation with different magnitude that depends on the load profile. Finally, the results show opposite impacts that depend on orientation and location when switching from a tilt angle of 30° to 45°. For a south orientation in Almeria and Lindenberg, the degree of autarky is increased when approaching the optimum tilt angle, while for west and east orientations in Lindenberg self-consumption increases.

技术经济分析首先调查了倾斜角和方向对屋顶太阳能发电机生产状况的影响以及德国特定位置的单户住宅光伏电池存储系统的相关性能。然后，对西班牙阿尔梅里亚的其他地点进行技术比较。

计算是基于模型的，并考虑了用户负载曲线，技术和经济型光伏电池存储系统参数以及德国案例的法规框架。参数“自耗份额”，“自给自足程度”和“以平均电费成本表示的经济效率”构成了建模结果的重点。结论是自给自足与自给自足的程度之间存在强烈的反相关关系。在系统设计方面，必须在追求高自我消费和高度自给自足之间进行权衡。

建模结果的主要发现表明，在德国的林登贝格，向南的自给自足程度最高，平均电费成本最低，但自耗份额也最低。对于朝东/朝西的屋顶，一个有趣的可能性是在两个方向之间平均分配总装机容量。这使得可以受益于东方取向的高度自我消费和西方取向的高度自给自足。通常，必须考虑到最佳方向强烈取决于用户负载曲线。技术分析表明，将位置更改为阿尔梅里亚，会增加自给自足的程度，并减少南向自给份额，而南向的自给份额则取决于负载曲线。最后，结果显示了相反的影响，当从30°的倾斜角度切换到45°的倾斜时，取决于方向和位置。对于阿尔梅里亚和林登贝格的朝南方向，自给自足的程度在接近最佳倾斜角时会增加，而对于西向和东向则在林登贝格时自耗会增加。