(3) Access situation: It is necessary to collect the main electrical wiring diagram and electrical room layout plan, combined with local power grid policies (small 0.4KV access does not exceed 25% of the upper-level transformer, T transmission control line transmission capacity does not exceed 30%, the specific percentage needs Go to the local power grid company to verify), determine the access method through the number and capacity of transformers (dedicated line access to the public grid or through the user's internal power grid to the public network) . For spontaneous self-use projects, it is recommended to use low-voltage grid connection to reduce construction costs, and it is easier to meet the rate of return.
(2) House owner: mainly verify whether the lessor under the roof is the owner of the house, if it does not require authorization and recognition of the house owner; for projects involving multiple roofs, a lease agreement needs to be signed with each house owner; For a project involving multiple people sharing a roof, it should be agreed by the proprietor who owns more than two thirds of the total area of the building and more than two thirds of the total number of people.
(3) Owner background
It is evaluated whether the roof-owned company can survive for more than 25 years. It is recommended that priority should be given to the cooperation of owners with strong enterprise strength, good industry prospects, standardized business operations, and regular financial affairs. Priority should be given to the roof construction of state-owned enterprises, listed companies, large private enterprises, and foreign companies for investment and construction, and to avoid the risk of flammable and explosive production. Products, companies that emit corrosive gases, and emit a lot of smoke. It is necessary to investigate whether the owners have lost faith, legal disputes, property rights have been mortgaged or sealed up. The house is mortgaged or sealed, which results in the house being discounted or auctioned. The lease contract is not legally binding on the house assignee. It is recommended to do a credit investigation in the early stage and then notarize or file the lease contract. Spontaneous self-use projects also need to analyze the owner’s financial statements and evaluate the owner’s ability to settle electricity bills on time.
2. Technical compliance
(1) Roof load: You need to get the engineering design drawings of the house and find the original design unit of the building or a third-party testing agency for load demonstration. You need to check whether the drawings are consistent with the actual construction. The reinforced concrete roof with a constant load of 50kg is rich, and the color steel tile roof with a constant load of more than 15kg can meet the photovoltaic installation requirements, and can be fully paved. If the full paving cannot be met, the installed capacity of the project can be reduced or reinforced to meet the conditions. It is recommended not to skip this step in order to save money. In many projects, it is found that the load does not meet the requirements after the procedure is completed, and it is not worth the loss.
(2) Roof situation: The roof type is usually divided into reinforced concrete roof and color steel tile roof. For the cement roof, it is necessary to investigate the large-scale equipment on the roof that may block the photovoltaic modules. For the color steel tile roof, in addition to load, large equipment shielding, parapet shielding, lighting belts and roof years (recommended within 5 years of construction), whether there is corrosion and water leakage. It is not recommended to construct a roof of trapezoidal color steel tiles, which will cause water leakage.
(3) Access situation: It is necessary to collect the main electrical wiring diagram and electrical room layout plan, combined with local power grid policies (small 0.4KV access does not exceed 25% of the upper-level transformer, T transmission control line transmission capacity does not exceed 30%, the specific percentage needs Go to the local power grid company to verify), determine the access method through the number and capacity of transformers (dedicated line access to the public grid or through the user's internal power grid to the public network) . For spontaneous self-use projects, it is recommended to use low-voltage grid connection to reduce construction costs, and it is easier to meet the rate of return.
(4) The self-use ratio reaches the standard: the spontaneous self-use projects need to sign the EMC energy contract management agreement, and the self-use self-use projects refer to discount ≥ 10%. In the early stage of the spontaneous self-use project, a 12-month electricity bill and electric load curve are required to calculate the comprehensive electricity price and spontaneous self-use ratio.
(5) Blocking problem: It is recommended to go to the local planning department in the early stage to ask if there are other buildings planned to be built around the roof.
(6) Risk of expropriation and demolition: Investigate the planning of the housing area to avoid that the rental house has been included in the expropriation plan by the government
3. Procedure compliance
(1) Procedures related to the project: There are two main procedures involved in the distribution, one is the registration certificate, and the other is the approval of power connection. For the record certificate, you need to pay attention to the record time (whether it expires) and the record capacity. Some regions, such as Shandong, have clear requirements for the difference between the record capacity and the actual installed capacity. For the approval of power access, many middle parties cannot distinguish the difference between the letter of access opinion and the opinion of power access review. During the development process, we first get the letter of access opinion, and then we need to prepare the report of the access system. After the review, the power access review opinions will be issued. This is the final approval given by the power grid company. In other words, the preliminary procedures will not be completed until the review opinions are obtained.
(2) Project company: Whether the company has filed a tax return in time after opening the account; the project company needs to pay attention to the following points when signing the lease agreement: the power plant relocation compensation agreement is clear; the lease period of more than 20 years is invalid, two contracts and one contract are signed The time limit is 20 years, and another contract to be effective is signed; the lease contract needs to stipulate the terms of land occupation for supporting facilities; the roof maintenance responsibility is clearly divided to prevent future leaks from affecting the power generation.