How to choose photovoltaic power generation equipment for homes?

The photovoltaic power generation system is not a standardized product. It needs to be designed according to the user's own situation. Many customers know less about this. So for users who are interested in purchasing solar power systems, what should be considered before purchasing?

The objective environment of residence

It is recommended to first consider the installation location and installation area of ​​photovoltaic modules. Generally speaking, south roofs or east-west facing roofs are more suitable for installation. In addition, families with yards or balconies can also consider installing sun sheds, carports, or sunshades.

Personal economic factors

Although the investment in personal distributed photovoltaic power generation projects is relatively large, it is a long-term and environmentally friendly investment. According to estimates, the cost can usually be recovered in 5 to 6 years. The lifespan of photovoltaic equipment is generally around 25 years.

Occlusion

From the perspective of safety and stability, the impact of permanent load, wind load, snow load, and temperature load on the photovoltaic array and buildings needs to be considered when designing. Ensure that the photovoltaic array can withstand the local extreme weather. Before the installation of the distributed system, the load capacity of the building should be surveyed, calculated, and checked, and a reasonable installation plan should be designed.

Grid-connected

According to calculations by industry insiders, if the electricity consumption is not too large and the electricity price does not exceed the first level, based on the current income, the full online mode is more appropriate. If the electricity consumption is particularly large and reaches the third-range electricity price standard, it is more appropriate to use the spontaneous self-consumption surplus electricity to connect to the grid.

Installer's choice

A set of photovoltaic power generation systems mainly includes photovoltaic components, 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 use but may also affect other users. It is recommended that you choose regular and quality-assured photovoltaic modules and related equipment when purchasing to avoid worries.

Bracket

The first is the material of the support. The photovoltaic support is generally required to be galvanized C-shaped steel or aluminum. If it is angle steel or a square second, look at the tilt angle of the bracket. Each area has an optimal tilt angle. Photovoltaic power generation larger or smaller than this angle will be affected. Finally, it depends on the aesthetics of the bracket. A high-quality power station, the bracket is installed horizontally and vertically, and the appearance is neat and generous. Power stations with poor construction quality are crooked, and even the components appear wavy, which seriously affects power generation.

Wiring

In a good photovoltaic power station, all cables will be wrapped in PVC pipes, and bare wires are rarely seen. Even if the boards are connected in series, the parts that must be exposed are placed in the C-shaped steel channel and fastened with cable ties.

Male and female head

Photovoltaic connectors, also called male and female headers, are the smallest items in photovoltaic power stations that have the lowest cost but are most likely to affect photovoltaic power generation. Photovoltaic male and female headers have the functions of waterproof, sun protection, and corrosion protection. The quality is hard to be seen with the naked eye, but there is a very simple way to judge the quality. Pull the male and female connectors that are buckled together. If the wire falls off or the male and female connectors are tripped, the quality is unqualified.

Distribution box

The main function of the photovoltaic distribution box is to protect the photovoltaic power station. There must be an isolating switch (note that it is not an air switch), lightning protection devices, overvoltage protection, and overcurrent protection with obvious breakpoints, and one less will reduce the safety of the photovoltaic power station. Confirm whether the accessories are complete, and the material problem.

Shadow

Shading is an important factor that affects power generation, and may even cause no photovoltaic power generation and damage components over time.

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