Favorable factors and unfavorable factors

(1) Favorable factors: 
① Cutting-edge technological design and craftsmanship can make up for the cost of traditional building materials; 
② No noise during operation; 
③ During the power generation process, no additional transportation costs are required; 
④Without any moving parts, it requires minimal maintenance during its 20-year working life; 
⑤ Will not cause air pollution. Solar cells generate lkWp of electricity, which can avoid the generation of 1000kg of carbon dioxide; 
⑥ Independent power supply, thus reducing the cost of power transmission and distribution; 
⑦ A set of standardized design and debugging methods has been formed, so installation and use can be carried out in batches, thereby avoiding the financial pressure caused by excessive one-time investment. 
(2) Unfavorable factors: 
① Photovoltaic cells need to consume relatively high energy in the production process. If they are used unreasonably, it may lead to the phenomenon that the power generation in the life cycle is lower than the production energy consumption; 
② Improper utilization or recycling of acid lead-acid batteries may easily cause environmental problems; 
③ Heavy metals (such as cadmium) contained in photovoltaic cells may cause serious environmental problems if they are not recycled properly; 
④ Discarded photovoltaic cells and their battery components may leak mercury, lead, and cadmium, causing harm to the environment.