Designing a home solar power system is definitely not a simple matter. What you need to know about the main components of a solar system. Such as knowledge of solar panels, knowledge of inverters, knowledge of installation accessories and so on. And the technology of these components is updated every year. The installation and wiring of all components must comply with IEC standards.
We try our best to teach you how to install solar power system for home through this article. Note that if you do not hold an electrician certificate, it is recommended to ask a local professional solar system installation company to do it.
Precautions For Installing Home Solar Power System
Consider Grid Connection Conditions
First of all, we need to understand the local grid connection policy. Whether your place can connect solar energy to the grid. Off-grid systems require batteries, and the cost will be much higher than grid-connected systems. Moreover, due to the instability of solar power generation, the grid-connected system can better recover the cost of the solar power generation system.
Solar Panel Power
Second, you need to consider how much solar panel power you need. According to the daily electricity consumption, choose the solar panel with the appropriate power.
For example, a family’s monthly electricity consumption is 300 kilowatt-hours. Then the average daily electricity consumption of this family is 10 kilowatt-hours of electricity. If we use a 5kW system with an average of 5 hours of sunlight per day, the system can generate 25 kilowatt-hours of electricity per day. In this way, not only can meet their own electricity consumption, but also can upload the remaining electricity to the grid.
Be sure to condsider rainy weather and the efficiency of the PV inverter (80% – 90%). In order to make full use of the photovoltaic inverter power, we suggest that the total solar power can be greater than 10% of the photovoltaic inverter power.
Solar Panel Installation Site
Roofs are one of many options when choosing a site for solar panel installation. We must consider the following points to choose a solar panel installation site.
- Whether the site has enough light time. As the sun rises and sets, there may be shadows around to affect the solar system to generate electricity.
- Whether the site has enough area to arrange all the solar panels. Generally speaking, south 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 awnings.
An installed capacity of 1000 watts requires a roof area of ten square meters. Villas, townhouses, and single-family houses are suitable for installing distributed photovoltaic power generation projects. If the installation area is limited, you can consider high-power 650W solar panels or even double-sided solar panels.
The primary function of a solar inverter is to convert the direct current generated by the solar panels into alternating current that household appliances can use. Usually, the inverter of the home solar system is between 1KW and 10KW. Inverter selection should consider the following points:
- The power required by most electrical appliances at the beginning is the peak power. This will be much greater than the rated power. Such as air conditioners, refrigerators, washing machines, induction cookers, microwave ovens, etc. Peak power impacts power generation and energy storage and needs to be appropriately increased. For example, if the total power is 1600 watts, it is recommended to use an inverter with a power of more than 3000 watts.
- Many poor inverters on the market have a nominal power much smaller than the actual load power.
- Be sure to consider the short input voltage and the current range of the inverter solar panel. If the output voltage of the photovoltaic panel array exceeds the input voltage range of the inverter, the inverter will not work.
- Considering the energy conversion efficiency of the inverter and the rainy weather conditions, it is recommended to increase the solar panel’s power by 10% to 15%.
Compared with solar panels, the choice of inverter is more critical. Because the technology of solar panels is very mature. As long as you don’t buy inferior products, the life of solar panels can reach more than 20 years. The warranty for off-grid inverters is usually 1 to 2 years. The warranty of the grid-connected inverter is 5 years.
Installation of Solar Panels
Mounting solar panels requires these bracket accessories:
Bracket Support Leg
Solar Panel Matching Side Pressure
Medium Voltage For Battery Panels
Solar Panel Installation in Different Scenarios
Pouring Concrete Piers on Cement Roof
Pouring concrete piers on concrete roofs is the most common way to install supports.
Advantages: fixed, no damage to waterproof.
Disadvantages: It requires a lot of labor and takes a long time. Cement piers need more than a week of curing time. The brackets can only be installed after the cement pier has fully cured, requiring extensive prefabricated moulding.
Prefabricated Cement Brick
Advantages: Compared with making cement piers, it saves time. Counterweight cement bricks can be customized in advance to save cement embedded parts.
Disadvantages: transportation is inconvenient and increases transportation costs.
Make a flange at the bottom of the column of the bracket. Several bracket arrays are connected together using galvanized steel sections. A unit of 500 kilowatts or even more than one megawatt. The self-weight of the bracket array is used to increase the wind resistance. Only a few concrete piers need to be made at the roof bearing points to secure a large array of brackets.
Advantages: quick and easy installation, easy disassembly.
Disadvantages: The cost is high, and the cost of the bracket is not less than one yuan per watt.
Color Steel Tile Roof Support
The service life of color steel tiles is 10-15 years, and the load-bearing capacity is 15-30 kg per square meter. Tiled installation is mostly used.
Installing solar power system for home can give you a sustainable energy source for decades to come. A lot of hipsters want to store electricity. At this point you need a solar hybrid inverter. The solar home power systems bring many benefits to the home. Here are some important advantages about installing a solar power home system:
Save Energy And Reduce Energy Costs
The solar home power systems use solar free renewable energy to generate electricity. It does not need to rely on traditional energy suppliers. This means you can reduce your need for conventional electricity, reducing associated costs.
Eco-Friendly & Reduced Carbon Footprint
Solar power is a clean energy source. It does not produce greenhouse gases such as carbon dioxide, nor does it pollute the atmosphere or water resources. By installing a home solar power system, you can reduce your need for fossil fuels.
Increased Energy Independence
The solar power home system is able to operate independently without an external power supply. This is especially important in remote areas where the power supply is unreliable or where power outages are common. You can store power when the solar panels catch enough sunlight and use it when you need it.
Long-term Return on Investment
The initial cost of solar home power systems can be high. But over time, it can give you a long-term return on investment. By generating your own electricity and selling excess electricity to the grid, you can reduce or eliminate your electricity bills. There is even the possibility of generating income through the solar electric system.
Solar energy is a sustainable form of energy that will never run out or dry up. The use of solar energy systems can help drive sustainable development and reduce dependence on finite resources. And create a cleaner, more sustainable source of energy for future generations.
In conclusion, installing a home solar power system brings multiple benefits to the family. Including saving energy and reducing energy costs, environmental protection and emission reduction, improving energy independence, long-term return on investment and sustainable development. These benefits not only benefit the individual family, but also have a positive impact on society and the environment.