Home Solar Photovoltaic Power Generation System: Q&A

1. What is a home solar power generation system?

A home solar PV power generation system converts sunlight into electricity through solar panels installed on the roof or open ground, and then converts it into AC power that can be directly used by the household through an inverter.

The system typically consists of solar panels, solar inverter, a mounting system, cables, and (optional) energy storage batteries, and can be divided into three types: grid-connected systems, off-grid systems, and hybrid energy storage systems.

2. What are the benefits of installing a home solar photovoltaic power generation system?

• Reduced electricity bills: Self-generated and self-consumed electricity reduces reliance on the grid.
• Improved power supply stability: Combined with an energy storage system, it can provide backup power during power outages.
• Green and low-carbon: Reduces fossil fuel consumption and lowers carbon emissions.
• Clear long-term returns: A one-time investment provides stable power generation for the long term.
• Increased home asset value: In some countries, photovoltaic systems can increase the attractiveness of a property.

3. How long does it take to recoup the investment in a home solar photovoltaic power generation system?

Taking a residential project in Nigeria as an example, based on the effective roof area available for installation, we will use a 5 kW system capacity as an example.

Based on the average daily sunshine hours in Nigeria (6-12 hours), the system is configured with 6 pieces of 550W solar panels and a 5.12 kWh energy storage battery. Considering the local electricity tariff in Nigeria (0.036-0.15 USD/kWh) and the cost of using a diesel generator (0.25–0.40 USD/kWh), the estimated payback period is 2-5 years. Considering that solar panels have a 30-year lifespan, the remaining 25-28 years will be a period of pure profit, continuously generating “low-cost electricity” after the initial investment is recovered.

4. Why is a customized residential solar energy storage solution necessary before installation?

There are many details involved in the installation of residential solar systems, including roof structure, roof angle and orientation, load-bearing capacity, etc. Every detail affects the future power generation efficiency and user experience. Therefore, it is essential to find a professional team to design a customized home energy storage solution before installation. Each family has different electricity consumption patterns and roof conditions, and standardized solutions often fail to balance cost and benefits.

A customized solution can:

• Accurately match the family’s daily electricity consumption
• Rationally configure whether energy storage is needed and the storage capacity
• Avoid waste caused by oversized or undersized systems
• Meet local grid connection, electrical safety, and regulatory requirements

Scientific design is key to determining the long-term profitability of the system.

Currently, many residential solar rooftop power generation and energy storage products on the market require customers to order the product first before a professional team can customize a solution.

This poses safety risks for the subsequent use of the product. A home solar energy storage system is a long-term asset. If the installed system is found to be unsuitable for the family’s needs, subsequent dismantling and reinstallation will be very troublesome and will significantly affect the system’s lifespan.

To help you reduce the cost of trial and error, you can submit the form below, noting “Residential Solar Solution,” to receive a free customized residential solar energy storage solution.

5. How much sunlight can we utilize?

Solar energy resources are usually measured in terms of “equivalent full-load hours“.

Globally:

• Most regions have an average annual solar resource of approximately 3–7 hours/day.
• Regions such as the Middle East, Africa, and Latin America have particularly excellent solar conditions.
• Even in areas with average sunlight, photovoltaic systems remain economically viable.
• In addition, product selection, installation orientation, etc., will all affect photovoltaic power generation.

6. How to assess the safety of a home solar power generation system?

This can be judged from the following aspects:

• Core equipment certification: Do the inverters and batteries comply with international safety standards such as IEC and EN?
• Electrical protection design: Does it have overvoltage, overcurrent, short circuit, grounding, and lightning protection?
• System structure safety: Do the brackets meet wind resistance and corrosion resistance requirements?
• Installation specifications: Is it installed by a professional team and approved by local authorities?

Safety and compliance are prerequisites for home photovoltaic systems.

7. Which types of roofs are suitable for installing home solar photovoltaic power generation systems?

Whether it’s a pitched roof, flat roof, corrugated metal roof, or glass house/sunroom roof, photovoltaic systems can be installed. Modern home energy storage products can now be customized to fit various roof structures, so there’s no need to worry about roof structure issues.

8. How many solar panels are needed to install a home solar photovoltaic power system?

Let’s take JNTech’s photovoltaic energy storage system as an example:

Currently, there are three main product specifications with photovoltaic panels:

5KW energy storage system: 6 x 550W solar panels, total solar panel power 3300W, daily power generation 15 kWh/day (based on approximately 5 hours of sunshine per day);

6KW energy storage system: 7 x 580W solar panels, total solar panel power 4060W, daily power generation 20 kWh/day (based on approximately 5 hours of sunshine per day);

12KW energy storage system: 9 x 580W solar panels, total solar panel power 5220W, daily power generation 25 kWh/day (based on approximately 5 hours of sunshine per day).

9. What is the cost breakdown of a home solar photovoltaic power generation system?

This system mainly includes several parts such as battery cells, energy storage inverters (bidirectional converters), and component systems. A typical system is generally 5KW (components + inverter) with 10KWH (energy storage battery) or 10KW + 10KWH.

The battery cell is the core of the energy storage system, accounting for approximately 45-50% of the cost; the energy storage inverter controls charging and discharging and performs AC/DC conversion, accounting for approximately 10-15% of the cost; the component system, i.e., the photovoltaic system, is used for solar power generation, accounting for approximately 20-25% of the cost.