Installation of roof-type residential PV power stations requires familiarization with 7 basic knowledge (installed capacity, power generation, PV subsidies, grid-connected application, construction of PV power plants, acceptance inspection and installation costs).
First, calculate the installed capacity based on the condition of the roof (courtyard)
Under normal circumstances, with each component 280 watts, component specifications are: length 1164mm wide and 992mm We estimate how much photovoltaic system can be installed on our own roof (courtyard), which can be calculated according to the following formula:
1. Fixed on cement flat roof: installed capacity = 100 watts/square meter × roof area.
2, fixed in color steel or tile roof: installed capacity = 150 watts / square meter × roof area.
3, use the overhead column to install in the courtyard to achieve active tracking: installed capacity = 1010 watts / square meter × (the length of the courtyard thing × 5 meters)
Second, photovoltaic system power generation
For the average family, installing a set of 3~5kW photovoltaic power generation system can meet the daily electricity needs.
For example, the fixed installation in Hebei Province is calculated based on the annual electricity generation hours of 1460;
A fixed installation of a 3-kilowatt system can generate an average of about 12 kWh per day;
A fixed installation of a 5-kilowatt system generates an average of 20 degrees of electricity a day, and when the weather is good, it can reach 24 degrees or more;
The installation of a 5-kilowatt system that can be actively tracked can generate electricity at an average of 26 degrees a day, and when the weather is good, it can reach 30 degrees or more. Due to different regions and different temperatures and light conditions, the amount of power generation will vary.
Third, understand the local PV subsidy policy
Photovoltaic subsidies are divided into state subsidies and local subsidies. The state subsidies are 0.42 yuan/kWh, and the total subsidies are 20 years. Local subsidies vary according to local policies.
Photovoltaic subsidies for general household systems are mainly related to our online mode and are divided into two cases:
1. Spontaneous use, after-net mode: The electricity generated by the PV is given priority to the user's household appliances and other equipment, and is used to sell the electricity to the national grid. Of course, when the amount of electricity generated is not enough, household equipment needs electricity from the grid.
The amount of subsidies is: self-use electricity × (state subsidies × subsidy years + local subsidies × subsidy years).
Among them: the state subsidies 0.42 yuan / degree, subsidies for 20 years; different local subsidy policies.
2. Full-scale Internet access: All the electricity generated is sold to the national grid.
The amount of subsidies is: the amount of electricity generated × (national subsidies × subsidy years + local subsidies × subsidy years)
Among them: the state subsidies 0.88 yuan / degree -0.98 yuan / degree, subsidies for 20 years; different subsidy policies around.
Fourth, the application process
Knowing the relevant knowledge of the installation system, we also need to go to the grid company to apply for the grid connection and ensure that it can be connected to the grid after installation, so that we can get subsidies and sales revenue!
The first step: Bring ID card, real estate license (land use permit), to the local power bureau, the scale of different units is not the same, the home system to the district power bureau can handle.
The second step is to formulate an access system plan. This step is completed by the grid company. You do not need to do it. Wait for the static message. Of course, some local grid companies will allow you to wait longer.
The third step: confirm the access system program, this step is mainly to confirm whether the full amount of online or offline Internet access, in general, the owner of the electricity price is relatively high and the electricity is more suitable for spontaneous use mode, otherwise directly selected The amount can go online.
Step 4: Issue a network submission, which is in principle agreed to access the grid.
Step 5: Find a qualified construction company, pay attention not to be too greedy for cheap, too low price can not do a good system, it is best to choose a regular and reliable manufacturers, do not want to be cheap, or install the system quality There is no guarantee that after the sale, no one can have a tragedy!
V. Construction of photovoltaic power plants
First of all, the construction party will look at the site and produce preliminary drawings. Generally there are plans, renderings, project budgets, etc. Now generally use 255W~260W components. Experienced engineering teams only need two working days to complete the construction. This process is very fast, and then you have a beautiful photovoltaic power plant on the roof of your home!
Sixth, on-grid acceptance
After the completion of the distributed photovoltaic power station, a two-way electricity meter is added after the acceptance check of the grid, and then an electricity sales contract is signed, so that you can legally send power to the grid.
Seventh, installation cost
Different regions, different circumstances, use different products and different installation methods, the installation price is not the same; the current market conditions, fixed installed at about 7 yuan / watt; time-phase active tracking installed at 8 yuan / watt.
Hammer And Axe,Mini Claw Hammer,Steel Axe Head,Fire Fighting Axe
SHAOXING SINO IMPORT & EXPORT CO.,LTD , https://www.sxsmarto.com