1. Photovoltaic power generation is inseparable from policy support. As the saying goes, "There is no rule, there is no circle", and the "rule" here is the national level of photovoltaic power generation subsidy policy, grid-connected policy and technical standards. With the guarantee of policies, the promotion of photovoltaic power generation can develop in an orderly manner. . In 2013, the National Development and Reform Commission determined that the national subsidy for distributed photovoltaic power generation was 0.42 yuan/kWh (before tax), with a principle period of 20 years. In addition, many regions have local subsidies. Many users always have doubts about the policy when consulting about the installation of photovoltaic power generation: they are worried about whether the subsidy can be implemented, whether they can "connect to the Internet in full", and whether the grid company can grant a grid connection license after the installation is completed... these doubts It is inevitable, so the user must understand the local policy clearly before installation, apply according to the local application process, and provide the grid-connected qualification required by the power supply department when connecting to the grid.
2. Consider the installation location and determine the installation capacity. "It's hard for a clever woman to cook without rice." The same is true for building a household photovoltaic power generation system. First, find a suitable place to install the photovoltaic system, and then determine the installation capacity. The determination of the installation capacity should also be judged from the scale of the roof or open space, and the power situation of the user, because it is only economical to calculate it like this. Here we can adopt a rough calculation method based on past experience: under the conditions of roof load-bearing, flat roof can be based on 65-70 watts/square meter; slope roof can be based on 75-80 watts/square meter.
3. Settle the cost account of investment and income. Photovoltaic power generation systems need to consider equipment costs, installation costs, service costs, etc. The equipment costs are subdivided into components, inverters, brackets, combiner boxes, cables, etc., where photovoltaic modules account for about 50% of the overall price. The distribution of generators and other components is about 10%, and the current market price is 8-10 yuan per watt. The brilliant solar photovoltaic power station is the preferred photovoltaic power generation system for family power stations.
After understanding the composition of costs, let's look at the benefits. At present, photovoltaic power generation revenue is divided into three major parts. 1. Subsidy income. This part is the 0.42 yuan/kWh of photovoltaic power generation subsidy granted by the state. In addition, there are local subsidies in some places. Users can get this part of the subsidy regardless of whether they are connected to the Internet or for personal use. 2. The user's income from selling electricity. After the photovoltaic power generation system is built, users can obtain electricity sales income regardless of whether they use the "full-scale online" mode or the "spontaneous self-use, surplus electricity online" mode. This part of the electricity price is traded according to the local desulfurization electricity price. The unit is the grid. 3. Saving electricity bills for users is also a benefit. Nowadays, various household appliances are convenient and enrich people's lives, but with it comes high electricity bills. Whether it is a user in the city or the country, the monthly electricity bill is expensive. After installing the photovoltaic power generation system, monthly electricity costs can be saved, and can continue to save about 20 years.
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