1. It is necessary to ensure that the property right of the house is completely yours or that other property owners sign for you to install the power supply bureau before you can install the electricity meter. In other words, only villas and farmhouses are suitable, and all the owners downstairs should sign for the small and high floors (office buildings are suitable for commercial systems);

2. The photovoltaic meters installed in the power supply bureau are bidirectional meters, so the inexhaustible electricity can be sent back to the power grid, and the power supply bureau will give you money according to the local coal-fired electricity price. Otherwise, no matter whether you use electricity or send electricity in reverse, the ordinary electricity meters are all true, and the power supply bureau will double your money.

3. Only the solar energy system installed in the power supply bureau can enjoy state subsidies and local subsidies (provincial subsidies and municipal subsidies, and there are subsidies in Pudong, Shanghai), and only when you eat subsidies.

4. Charging and storage+spontaneous self-use is not economically feasible. The battery will be scrapped after 3-4 years, and the cost of the battery is 2-3 times higher than that of the solar battery.

5. If there is no local power grid and it is necessary to rely on solar energy to solve the problem, you can consider an off-grid system. If you have a hobby of installing solar energy but can't get approval from the power supply bureau, you can install an anti-reflux system. The cost of this system is not low, about 5,111 yuan.

The subsidy of individual users' country is 1.4 yuan (this year, it may be adjusted next year, and after adjustment, it will be paid for 11 years according to the subsidy of installation year), which varies from region to region. For example, the subsidy in Shanghai is 1.42 years, and that in Wuhan is in 1.2 yuan for 11 years. Anyway, the number of years of local electricity price subsidy is equal to half of the cost price of equipment, and the other half is your money and your income.