Consider these points before installing a domestic photovoltaic power station

Solar power system is not a standardized product. The same configuration may not be suitable for all users. It needs to be designed and configured according to the user's own situation. For this reason, many customers know less. So for those who are interested in purchasing solar power systems, what considerations should be taken before buying?

First consider the objective environment of residence

In general, an individual applying for a solar photovoltaic power station to connect to the grid does not require much qualification in addition to clarifying the right to use the roof. However, apart from the policy, some objective factors need to be considered before installing a solar photovoltaic power station.

It is recommended to first consider the installation location and installation area of ​​the PV modules. Generally speaking, the south roof or the east-facing roof is more suitable for installation. In addition, families with a yard or balcony may also consider installing a solar shed, a carport or a awning.

In general, an average of four kWh of electricity per kilowatt of PV system can be generated per year. Tiles require a roof area of ​​10 square meters, while bevel shops vary by an angle of about 7 square meters. Users can estimate how much photovoltaic power systems their home needs, based on power usage and available area. Currently, single-family houses such as villas, townhouses, remote areas and rural areas are more suitable for solar photovoltaic power station projects. If it is a residential area, the formalities may be tedious, requiring 2/3 owners of the entire unit to sign and agree to install.

Consider the personal economic factors

Although the individual distributed photovoltaic power generation project has a large investment, it is a long-term and environmentally-friendly investment. According to calculations, taking the current situation of sunshine in Shanghai as an example, every 10,000 yuan of equipment can generate 1,200 kWh of electricity a year. Assuming that 100% is incorporated into the national grid and all subsidies are in place, it is conservatively worth about 1.3 yuan per kWh. Earnings (actual current price subsidy in Shanghai far exceeds this), then one-year return is 1,560 yuan, 6.41 years can recover the cost. The lifetime of photovoltaic equipment is generally around 25 years, and after 18 years it is a net profit.

How to choose the grid connection mode?

The State Grid adopts an attitude of encouragement and cooperation for the application of distributed photovoltaic power generation. It allows the owners of photovoltaic power stations to adopt a settlement mode in which self-generated surplus electricity is used to access the Internet or all of the electricity is used online. Which of the two grid-connected models has more revenue?

According to estimates by people in the industry, if the electricity consumption is not too large and there is no more than one stall price, the current mode of operation is more appropriate for the full amount of access. If the power consumption is particularly high and the price of the third-grade power supply is reached, it is recommended to use the self-use mode of over-grid access. From the perspective of the country's grand strategy, it is natural to encourage home users to adopt the mode of self-use of spare electricity to access the Internet, which is also in line with the distributed characteristics.

Installer's choice

A set of photovoltaic power generation system mainly includes photovoltaic modules, inverters and various wires as well as electric meters and monitoring devices. Once the equipment is of poor quality, it will not only affect the safety of its own electricity, but also may affect other users. It is recommended that you buy regular, quality-assured PV modules and related equipment when purchasing to avoid any worries.

The above are some of the factors that need to be considered before installing a solar photovoltaic power plant. I hope that my friends who have investment needs in this area can help.

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