The installation cost of photovoltaic power generation is mainly the equipment cost, including: photovoltaic components account for about 49% of the total investment, electrical equipment such as inverters account for about 10%, cables and brackets each account for about 10%, and different photovoltaic installation companies have their own pricing standards.

According to the different component capacity and installation angle, the installation capacity varies greatly. Generally speaking, a photovoltaic power generation system with a kilowatt can generate four kilowatt hours per day, which requires an installation area of 10 square meter. If the installation scale is 3-5kW, the cost is about 30,000-50,000 yuan.

Matters needing attention in photovoltaic solar power generation

Under normal conditions, photovoltaic modules can generate higher current and voltage than under standard test conditions. When photovoltaic modules are connected in series, the voltages are added; When photovoltaic modules are connected in parallel, the currents are added; Photovoltaic modules with different electrical characteristics cannot be connected in series. Connecting photovoltaic modules with different electrical components may lead to electrical connection mismatch, so it needs to be installed according to the installation manual.

The maximum number of components that can be connected in series in each sorting column must be calculated according to relevant regulations, and its open circuit voltage value cannot exceed the maximum system voltage value specified by the component and the withstand voltage value of other DC electrical components at the local minimum temperature.