Residential Solar Photovoltaic System Solutions

Overall effect of installing solar panels on a family home

Residential solar photovoltaic system solutions are designed to provide families with a clean, renewable energy supply. By installing photovoltaic modules on the roof of the residence, solar energy is converted into electricity, realizing self-generation and self-consumption, and the surplus electricity is fed into the Internet, effectively reducing the family's electricity bill, improving the efficiency of energy utilization, and contributing to a green and environmentally friendly life.

I. System Overview and Design Principles

Family PV system installs PV modules on the roof or the ground, converts solar energy into electricity to meet the family's daily electricity demand, and realizes the efficient use of energy through the energy storage system. The design should follow the three principles of safety, reliability, economic applicability and intelligent management, and take into account the structure of the residence, electricity demand and regional lighting conditions.

Ⅱ.The design of photovoltaic program

Home Residential PV Schematic

1. Scenario Adaptation Program

Standardized program:

Applicable to common roof types, such as pitched roofs, flat roofs, etc. Fixed brackets can be used to install PV modules, maximizing the use of roof area.

Pitched roof:

Solar photovoltaic panels must be installed along the angle of the roof, and the base is fixed by hooks to reduce damage to the roof structure.

Flat roof:

Adopt bracket to adjust the tilt angle of PV panels, here can be different according to the latitude of different countries and regions around the world, make non-corresponding adjustments, it is recommended to be consistent with the local latitude, in order to optimize the efficiency of light reception.

Customized solutions:

For special roofing needs, such as sunroom, leveling, etc., it can be combined with Building Integrated Photovoltaic (BIPV) design, which combines both power generation and space expansion functions.

Sunrooms/sheds:

Covering the roof with photovoltaic panels, it realizes the integration of sun shading, waterproofing and power generation, and enhances the utilization rate of the roof.

2. Selection of system type

Grid-connected system:

Grid-connected system is suitable for grid-stable areas, excess power can be integrated into the grid to reduce electricity expenses, this situation requires the configuration of bi-directional inverters and intelligent controllers.

Off-grid system:

Off-grid system is suitable for areas without grid coverage, with energy storage batteries, such as lithium-ion batteries, as well as independent inverters, to achieve day and night power supply.

3. Energy storage and intelligent management

Energy storage configuration:

Select the energy storage capacity according to the average daily household electricity consumption (300-800kWh/month), and lithium-ion batteries are preferred for their high energy density and long life.

Intelligent control:

Through the BMS (battery management system) and monitoring platform, you can use the cell phone APP to adjust the charging and discharging in real time, prioritizing the use of PV power, with the grid/energy storage as a backup.

III. Selection of Key Equipment

1. PV modules:

Priority is given to monocrystalline silicon modules, and the conversion efficiency of the modules needs to be more than 22%, in order to balance durability and power generation efficiency.

2. Inverter:

Grid-connected systems use bi-directional inverters, can choose well-known brands, such as Huawei, Sunny Power brand, off-grid systems need to match the power of independent inverters.

3. Energy storage battery:

Recommended lithium iron phosphate batteries, and the battery cycle life should be more than 6000 times, the capacity of 1.5 times the configuration of the family nighttime electricity consumption.

4. Stands and accessories:

Select corrosion-resistant aluminum alloy bracket to ensure the safety of roof load-bearing, logging flat roof load-bearing needs to exceed 30kg/m².

IV. Implementation process and standardization

Installation of solar panels on residential roofs

1. Pre-assessment

Roof structure inspection:

Evaluate the load-bearing, waterproofing and shading conditions, and prioritize the south/southeast oriented roof.

Electricity demand analysis:

Statistics on the power of household electrical appliances, time of use, design of the installed capacity of the system, it is recommended to cover 120% of the average daily electricity consumption.

2. Installation and commissioning

Professional construction:

Select qualified enterprises to ensure that the bracket fixing and cable laying meet safety standards.

Grid connection application:

Submit to the power company for approval, complete the meter modification and system grid connection test.

3. Operation and maintenance management

Regular Cleaning

Clean the dust on the surface of PV panels every quarter to improve power generation efficiency by 5%-15%.

Intelligent monitoring:

Early warning of equipment failures, such as inverter abnormalities, through the monitoring system in order to shorten the maintenance response time.

V. Economic and Environmental Benefits

Example effect of photovoltaic in a family house

1. Economic Benefits

Minimize the payback period, generally take the 10kW system as an example, the total investment is about 40,000-60,000 RMB, and the cost can be recovered in 5-7 years.

The total investment is about 40,000-30,000 RMB, and the cost can be recovered in 5-7 years. It can reduce the household electricity bill by 15%-30% per year, and the excess electricity can be added to the public grid for extra income.

2. Environmental Benefits

Each kW photovoltaic system reduces CO₂ emissions by 1.5 tons per year, responding to green energy.

VI. Application cases (examples)

1. Rural households

In a rural household, a 10kW rooftop PV + 20kWh energy storage system is installed, generating 12,000kWh of electricity per year, which is sold into the public grid after satisfying the self-consumption, and generating a profit of nearly USD 2,000 per year.

2. City Villa

Using customized PV sunroom, for example, installing 15kW, annual power generation of 18,000kWh, saving 30% of the electricity bill, and both leisure function.

Conclusion

Home PV system has become a preferred solution to reduce energy cost and realize green life through scenario-based design, intelligent energy storage management and efficient equipment selection. With technological progress and policy support, home PV will accelerate the popularization of home PV and promote the transformation of energy structure to cleaner.

If you have questions about this photovoltaic system solution for your family home, you can talk to us further using the contact information on our website.