Practical questions about solar photovoltaic
1.The market is open and transparent, the technology is mature, and there is no big difference between things.
No, the quality of solar photovoltaic products is uneven! Price disparity, you have to learn to choose!
Photovoltaic panels: they are differentiated according to their quality, with low price of defective products, large attenuation of power generation, insufficient power generation capacity, and even safety risks. Please select pave with long term warranty.
Inverter: directly affect the amount of power generation, large voltage range, high efficiency of MPPT and good quality of components, which will make the power station produce more power. The poor inverter leads directly to the failure of power generation. Please select the inverter with long-term warranty.
Supports: materials and installation methods will directly affect the safety and stability of roof pave system. Too thin support material will lead to safety hazards. The material selection and installation of supports shall follow relevant construction engineering installation specifications.
2.A good choice of product quality can lead to a stable income
NO! The threshold of residential pave installation service is low. At present, more companies enter this business in the market. The rooftop power system needs professional design and installation, which is by no means good.
Electricity meters are installed by the grid company. To avoid loss of income due to non-grid-connection and loss of safety due to power grid-connection, please choose the experienced installer carefully.
3.Rain is abundant south of the Yangtze river and power stations are unregulated
NO! Distributors must have both sales and operations staff!
In the power system on the roof, people are usually not able to have the expertise for photovoltaic applications. Therefore, it is very important to choose a service provider with long-term operation and maintenance ability.
Using mobile phones and Internet platforms to monitor power generation in a timely manner, timely failure alarm is essential. Photovoltaic operation is not enough as long as it depends on rain!!!
4.Can solar photovoltaic be installed on the roof of my house? How much?
Not all the household roofs are suitable for photovoltaic applications, with poor load bearing, serious light shielding, building non-compliance, and potential fire hazards.
Generally speaking, the roof of 10 square meters with good sunlight condition can be installed 1 kiwi or so, the roof that faces north can not be.
5.Hangzhou has many rainy days. How much electricity can it generate in a year?
According to the solar irradiation conditions in Hangzhou area, such as the roof facing to the square, the sunlight is in good condition. Generally, 1 kilowatt photovoltaic power generation device can generate power up to 950-1050 degrees per year. If the service provider gives you when calculating, greatly exceed this power generation, that is not reliable!
6.How much electricity is produced is beneficial?
For example, if you install 15 260-watt photovoltaic panels on your roof, the peak power of installed capacity is 260X15= 3.9kw. The installation cost is 8-9 Yuan per watt, and the total installation cost is about 33,000 Yuan.
It produces about 3,900 degrees of electricity a year, and its own home USES 2,000 degrees of power in the daytime and 1,900 degrees of excess power to sell to the national grid. Your annual income is approximately:
2000 x0. 538 + 1900 x0. 4153 + 3900 x0. 52 = 3893 Yuan.
In addition, Yuan district still has the first outfit subsidy of 1 Yuan per tile, that is to say, the year before last still can apply for the one-time subsidy of 3900 Yuan.
7.the roof that the home leaves unused, can very make money? How many years does it work? At present, our service providers on the market have a commitment of 25 years to the rooftop photovoltaic power station, but it is not 25 years later will not generate electricity, will still generate electricity hoax commitment life of 25 years means that power generation efficiency remains above 80% within 25 years.
The power generation efficiency of the volt component decreases year by year! According to the national energy administration of industry and information technology, state "about promoting advanced photovoltaic technology application and the opinions of the industrial upgrading, common polycrystalline silicon, monocrystalline silicon and thin film battery components from the date of the project put into production operation, the attenuation rate within a year is not higher than 2.5%, 2.5% and 3%, respectively, a year after the attenuation rate is not higher than 0.7%, the total project life cycle attenuation rate is not higher than 20%.
8.the roof of house idle, can very make money? How many years does it work? Because our income mainly depends on electricity fee income, which is guaranteed by the quality of photovoltaic system, we must pay attention to product quality and service quality, and we must choose qualified products and reliable service providers.
