20kw Solar Power System for Home and Commercial

The 20kw solar system meets the electricity needs of small size businesses as well as large residences. A one-time investment in a constant supply of photovoltaic power for the next 30 years would be a very worthwhile investment. Therefore it is becoming more and more popular in the market. If you use a lot of electricity in the evening, adding batteries is a necessary option, which can lower your electricity bill and improve the conversion efficiency of PV power.

JMHPOWER’s professional PV design team can advise you or customize a PV solution to suit your needs.

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How Much kWh power does a 20kw solar system produce?

A 20kW solar system can generate between 60kWh and 110kWh of electricity per day, depending on the amount of annual solar radiation in your area, as well as the temperature and also the amount of electricity generated by the panels.

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 20kw system can generate in your area.

For example, if the area is 5kwh per day, then the 20kw can generate 20×5=100kWh per day.

You can also contact us and we will help you calculate the PV power generation according to your city.

solar power output calculation

20kw Solar System Size

The size of a 20kw solar system is around 90m²/970ft². This is based on 36 units of 550-watt solar panels, and the dimensions of the individual 550-watt solar panel are 2279x1134mm. 
 
It should be noted that if the solar panels need to be installed at an angle, space needs to be left between the different rows to avoid blocking sunlight, so the total area will increase.
20kw solar panel system kit

20kw Solar System Price List

Prices for 20 kw solar systems range from $5,000 to $14,000, depending on whether lithium batteries are needed or how much battery capacity is available. If the main use of electricity is during the day, then you can choose a grid-connected system without batteries. If the electricity is also used at night, then you need to calculate the size of the battery capacity needed according to the actual situation.

Model Price
20kw on grid solar system Around 5000USD
20kw off grid solar system Around 11000USD
20kw hybrid solar system Around 14000USD

20kw Solar System Installation

The connection of the solar system is not a very complicated process, but it requires a professional electrician, or a professional installation team can be installed according to the PV racking design drawings, solar inverter installation drawings and battery instruction manuals provided by us.

20kw solar system wiring diagram
home appliances

What Can a 20kw Solar System Run?

A 20kw solar system can power a wide range of household appliances and devices. It can easily handle multiple large appliances like refrigerators, washing machines, and dishwashers, as well as smaller electronics such as TVs and computers. With sufficient battery storage, it can also support nighttime usage and ensure an uninterrupted power supply for essential needs.

How does a 20kw solar system cope with grid failures?

1. Solar panel power generation: The 20kw solar system usually has an automatic detection function. Once the power grid is cut off, it can switch to solar power supply mode to ensure uninterrupted power supply.
2. Battery powered: If equipped with energy storage batteries, the 20kw solar system can switch to off grid mode in the event of a power grid failure, relying on the stored energy in the battery to continue supplying power.
3. Backup power supply guarantee: If the battery is depleted, a backup generator can be connected as a supplement to ensure the continuous operation of important equipment.
4. Optimize energy consumption management: During power grid failures, allocate electricity reasonably through intelligent management systems, prioritize the power demand of important loads, and extend system operation time.

How does a 20kw solar system cope with grid failures?
How to optimize the battery lifespan of a 20kw solar system?

How to optimize the battery lifespan of a 20kw solar system?

  • Reasonably control the discharge depth: avoid excessive discharge and try to maintain the discharge depth (DoD) of the battery within the recommended range. For example, the discharge depth of lithium-ion batteries can be controlled at around 80%.
  • Optimize battery capacity configuration: Choose the appropriate battery capacity according to actual needs to avoid long-term low battery operation and reduce deep cycle discharge.
  • Regular maintenance and monitoring: Regularly inspect the battery system to ensure that the battery is in good condition, promptly identify and address potential issues, and optimize the battery charging and discharging process through an intelligent management system.

20kw Solar Power System FAQ

The 20kw system comes with four 10kWh lithium batteries. If you’re using more power at night, consider increasing to 5 or 6 batteries. This will provide a larger energy storage capacity, ensuring a more stable power supply during peak evening usage.

A 20kw solar system can be sufficient for a typical house, depending on energy consumption habits and location. It generally produces enough power to cover daily household needs, especially when combined with battery storage for nighttime use.

A 20kw solar system is suitable for larger homes or small businesses with high energy demands. It can power multiple appliances and devices simultaneously, making it ideal for households with significant daytime usage. Additionally, it is effective in areas with ample sunlight, maximizing energy generation and reducing reliance on grid electricity.

The cost of a 20kw solar system varies widely, typically ranging from $5,000 to $14,000. This price largely depends on whether you need lithium batteries and the required battery capacity. If your primary electricity usage is during the day, a grid-connected system without batteries may suffice. However, if you also need power at night, you’ll need to determine the appropriate battery capacity based on your specific needs.

A 20kw solar system can power several air conditioners, depending on their wattage. It typically generates 60-110 kWh per day, enough to run multiple 1- 2kw AC units during daylight. However, if you plan to use air conditioners at night or require continuous operation, it’s essential to pair the system with adequate battery storage to ensure an uninterrupted power supply.

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