4kw Solar Power System for Home
4kw solar power system is becoming more and more popular in the home applications, because it can basically meet the daily electricity consumption of a family of about 5 people. It plays an important role especially in remote areas or areas with unstable utility power.
This system is mainly an off-grid system with 5kwh or 10kwh batteries, if there are consecutive days of utility power outages then more batteries are needed as a backup. If the electricity is rarely used at night you can choose a grid-connected system, which will save the battery investment and the system structure is simpler.
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buy all in one 4 kw off grid solar power system from Chinese supplier directly, home delivery service, over 30 years lifespan
Buy all in one 4kw on grid solar power system for home use, plug and play, easy to install, over 30years lifespan.
How Much kWh Power does a 4kw solar system produce?
A 4kW solar panel system can generate between 12kWh and 22kWh of electricity per day, or 370kWh to 680kWh per month, the difference being due to the latitude and altitude of the PV plant, this is because it leads to different amounts of solar radiation.
You can refer to the image below to know the peak sunshine hours per day in your area to calculate the amount of power a 4kw system can generate in your area.
For example, if the area is 5kwh per day, then the 4kw can generate 4×5=20kWh per day.
You can also contact us to calculate the solar power generation according to your city.
4kw Solar System Size
The size of a 4kW solar system is approximately 20m² (219ft²) based on the use of eight 550watt solar panels, each sized at 2279mm x 1134mm. This calculation assumes optimal panel efficiency and spacing. For systems using smaller power solar panels, the required installation area would be slightly larger due to the need for more panels to achieve the same power output.
4kw Solar System Price
The price of a 4kw solar system is around 1000USD to 3000USD, on grid systems are cheaper because they do not have a battery. If you need to use a backup battery, then you need to choose an off-grid or hybrid system. The cost of the backup battery accounts for a large portion of the cost of the system, so it is important to choose the battery capacity that suits your needs.
| Model | Price |
|---|---|
| 4kw on grid solar system | Around 1100USD |
| 4kw off grid solar system | Around 2800USD |
| 4kw hybrid solar system | Around 3000USD |
4kw Solar System Installation
4kw Solar System Load Capacity
The 4kw solar system can be used for appliances up to 4kw in total power, such as freezers, televisions, water heaters, drinking fountains, ironing boards, and so on. It is important to note that if the appliance has a motor, it can be powered by up to a 4HP motor, such as an air conditioner, washing machine, electric fan, etc.
How to Select Suitable Components for a 4KW Solar System?
1. Assess Energy Needs: Determine your household’s average daily electricity consumption to ensure the system meets your needs.
2. Choose High-Quality Solar Panels: Opt for solar panels with high efficiency ratings to maximize power output in limited space.
3. Select a Reliable Solar Inverter: A high-efficiency solar inverter ensures that the DC power generated by the solar panels is efficiently converted to usable AC power.
4. Consider Battery Storage: If you need power during outages or at night, choose a battery with sufficient capacity and a long cycle life.
5. Ensure Proper Mounting: Select sturdy mounting hardware suitable for your roof type to secure the solar panels and withstand weather conditions.
6. Check Compatibility: Ensure all components (solar panels, solar inverter, batteries) are compatible with each other for optimal system performance.
Common Faults and Solutions for a 4KW Solar System
1. Solar Panel Dust or Contamination: Regularly clean the surface of the solar panels to remove dust and dirt to maintain optimal power generation efficiency.
2. Shading of Solar Panels: Inspect and clear any obstructions around the solar panels, such as tree branches or buildings, to ensure direct sunlight.
3. Solar Inverter Overheating: Ensure the inverter is installed in a well-ventilated location, avoiding direct sunlight and high-temperature environments.
4. Solar Inverter Fault Indicator Light On: Refer to the inverter’s fault code, consult the user manual, or contact a professional for troubleshooting and repair.
5. Loose or Aging Cable Connections: Regularly inspect cable connections to ensure they are secure. Replace any connections that are aged or damaged.
6. Unstable Grid Voltage: Check if the grid-tied protection device is functioning properly. Install a voltage stabilizer if necessary to ensure a stable grid voltage.
7. Loose or Deformed Mounting Brackets: Regularly inspect the stability of the mounting brackets. Tighten any loose parts and replace any damaged brackets.
4KW Solar Power System FAQ
A 4kw solar system consists of 8 x 550watt, 10 x 400watt, or 14 x 300watt solar panels. Currently, the 550watt solar panel is the most popular model. This trend is largely due to the higher efficiency and space-saving nature of 550watt solar panels, which can generate more power with fewer solar panels, making them ideal for homes with limited roof space.
Generally, a 1-piece 5kWh or 10kWh battery is enough for a 4kw solar system. If more electricity is used at night, then more batteries are needed. It’s important to match the battery capacity with your daily energy consumption and solar panel output to ensure you have enough power during peak usage times.
The installation process of a 4kw solar system can vary in complexity. For those with technical experience, it may be manageable as a DIY project, but it typically requires careful planning and adherence to electrical codes. However, due to safety concerns and the need for proper installation to ensure system efficiency and longevity, many people choose to hire a professional installer.
Yes, a 4kw solar system does need regular inspections to ensure optimal performance and longevity. Annual inspections are generally recommended to check for issues such as dirt buildup, shading, and wear and tear. In areas with harsh weather conditions, more frequent inspections may be necessary to address potential damage promptly.
Yes, a 4kw solar system is well worth the investment. With a minimum investment of only $1000, it will pay off for decades, providing consistent savings on electricity costs and reducing your carbon footprint over the long term.
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