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1.5kva Inverter Load Capacity: What Can it Carry?

A 1.5kVA inverter load capacity is 10-15 LED lights (5-10W each), 3-5 laptops (20-50W each), a small refrigerator (100-200W), a small television (50-100W), and 1-2 fans (50-100W each). Factors affecting the load capacity include battery capacity, inverter efficiency, appliance startup surge, total load, ambient temperature, and power quality. These determine performance and duration of power supply.

The capacity of a 1.5kVA inverter represents its ability to handle a specific amount of power. In this case, it can handle up to 1.5 kilovolt-amperes. 

Inverters are crucial in powering homes, offices, and industries by converting DC power from solar panels or batteries to AC power for specific appliances. 

However, it’s essential to understand the load capacity of an inverter to ensure safe and efficient operation. 

At GVE Projects Limited, we help you determine and select the best inverter for your solar energy system, provide an innovative energy requirement calculator that can help you estimate your energy requirements, help you install solar energy systems in your home or business, and offer maintenance and warranty services for your solar energy system. 

In this article, we’ll delve into the world of 1.5kVA inverters, exploring what they are, how to calculate load capacity, and recommended loads for optimal performance.

What is a 1.5kVA Inverter?

A 1.5kVA (kilovolt-ampere) inverter is a power electronic device that converts DC power from a source, such as solar panels or batteries, to AC power for your appliances. 

The voltage and current ratings of a 1.5kVA inverter typically range from 12V to 24V DC input and 120V to 230V AC output.

1.5kva Inverter Load Capacity

To understand the load capacity of a 1.5kva inverter, it’s crucial to know the power consumption of common household appliances. Generally, a 1.5kva inverter can power appliances with a combined power consumption of up to 1200 watts (1.2kW), considering the power factor and efficiency of the inverter.

As recommended by GVE, here are some common household appliances that are compatible with a 1.5kva load inverter: 

  • LED bulb
  • Ceiling fan
  • LED TV 
  • Refrigerator
  • Freezers
  • Decoders
  • Phones
  • Laptops

Generally, loads  that a 1.5kVA inverter can power include: 

  • 10-15 LED lights (5-10W each)
  • 3-5 laptops (20-50W each)
  • One small refrigerator (100-200W)
  • One small television (50-100W)
  • 1-2 fans (50-100W each)

Calculating an Inverter Load Capacity 

Calculating the load capacity of an inverter involves considering several factors, including voltage, current, and power factor. The following steps will help you estimate the load capacity for a 1.5kVA inverter:

  1. Determine the total power requirement of your appliances in watts (W).
  2. Calculate the total current draw in amperes (A) by dividing the total power by the voltage (V): I = P / V.
  3. Consider your appliances’ power factor (PF), usually between 0.5 and 1. A lower PF indicates a more inductive load, while a higher PF represents a more resistive load.
  4. Calculate the apparent power (VA) by dividing the total control by the power factor: VA = P / PF.
  5. Choose an appropriate battery. 

Types of Loads 

Different types of loads affect the inverter’s load capacity in various ways:

  • Resistive Loads (e.g., lights, heaters): These loads have a power factor close to 1 and do not significantly affect the inverter’s capacity.
  • Inductive Loads (e.g., motors, refrigerators): These loads have a lower power factor and require more current, reducing the inverter’s capacity.
  • Capacitive Loads (e.g., computers, televisions): These loads have a high power factor and don’t significantly impact the inverter’s capacity.

Factors Affecting Load Capacity:

While a 1.5kva inverter can handle a particular load, several factors can affect its actual load capacity.

  1. Battery Capacity: The capacity of the battery connected to the inverter determines how long the inverter can supply power to the connected appliances. A higher-capacity battery will offer a longer backup time.
  2. Power Consumption: The power consumption of the appliances connected to the inverter is directly proportional to the load on the inverter. To maximize the load capacity, it’s essential to use energy-efficient appliances.
  3. Inverter Efficiency: The inverter’s efficiency is another factor affecting its load capacity. An efficient inverter will have a higher load capacity than a less efficient one.

How to Check for the Capacity of Home Appliances

Here is a step-by-step guide on how to check for the load capacity of home appliances: 

  1. Make a list of all your home’s electrical appliances and devices, including lights, kitchen appliances, entertainment systems, and heating/cooling equipment. 
  2. Then, check each appliance’s power rating, usually listed in watts (W) or kilowatts (kW) on its label or nameplate. If the rating is given in amps (A) and volts (V), you can calculate the wattage using the formula: Power (W) = Voltage (V) x Current (A). This will help you determine your home’s total electrical load.
  3. Consider the duty cycle of each appliance, as not all devices run constantly. Estimate the average daily usage time for each appliance. 
  4. Then, the daily energy consumption is calculated by multiplying the appliance’s power rating by its average daily usage time. This will give you the daily energy consumption in watt-hours (Wh).

The formula to calculate daily energy consumption is:

Daily Energy Consumption (Wh) = Power Rating (W) x Average Daily Usage (hours)

For example, if a 100W light bulb is used for 8 hours a day, its daily energy consumption would be:

Daily Energy Consumption (Wh) = 100W x 8 hours = 800 Wh

This calculation helps you understand the total energy usage of each appliance and identify opportunities for energy savings.

  1. Calculate your home’s total daily electrical load by adding up all appliances’ daily energy consumption values. This will give you the total daily load in watt-hours (Wh). To convert this value to kilowatt-hours (kWh), typically used, divide the total daily load in Wh by 1,000 (since 1 kWh equals 1,000 Wh).

The formula to calculate the total daily load in kWh is: 

Total Daily Load (kWh) = Total Daily Load (Wh) ÷ 1,000

Difference Between a 1.5kva and 5kva

The critical difference between a 1.5kVA and a 5kVA is the power rating. 

The 1.5kVA (kilovolt-ampere) is a smaller rating, suitable for smaller loads, such as tiny homes or apartments, limited electrical devices (e.g., lights, TV, fridge), and low-power equipment (e.g., computers, printers).  

While the 5kVa is a larger rating, suitable for larger loads, such as larger homes or commercial spaces, multiple electrical devices (e.g., air conditioning, heating, various fridges), high-power equipment (e.g., industrial machinery, heavy-duty tools)

In general, the higher the kVA rating, the more power the device or equipment can handle. 

When choosing between a 1.5kVA and a 5kVA, consider the total power requirements of your devices and equipment. Using a device with a higher kVA rating than needed may save energy and resources, while using one with a lower kVA rating may lead to overloading and safety issues.

Why Choose GVE for your Inverter Needs? 

Here’s a list of reasons why you should choose GVE

#1. Experience: 

GVE has over 15 years of experience in the renewable energy industry, indicating a solid track record and expertise in providing inverter solutions.

#2. Comprehensive Solutions: 

GVE offers a wide range of solutions, including inverters, solar panels, batteries, and energy storage systems, making us a one-stop shop for your renewable energy needs.

#3. Quality Products: 

GVE partners with reputable manufacturers to provide high-quality products, ensuring reliability and efficiency in their inverter solutions.

#4. Customized Solutions:

GVE offers tailored solutions to meet specific customer needs, indicating a flexible and adaptable approach to addressing unique requirements.

#5. Technical Support: 

GVE provides technical support and maintenance services, ensuring assistance is available.

#6. Certifications: 

GVE holds various certifications, such as ISO 9001 and NERC, demonstrating a commitment to quality, safety, and environmental standards.

#7. Consultancy: 

GVE also offers consultancy and expert advice in renewable energy and inverters, which is a significant advantage. We offer consultancy services to assess your energy needs and provide personalized recommendations for optimal inverter solutions. With GVE’s consultancy and expert advice, you can benefit from:

  • Accurate assessment of your energy needs
  • Optimal inverter selection and system design
  • Maximized energy efficiency and savings
  • Professional guidance throughout the project lifecycle
  • Access to the latest industry knowledge and best practices.
  • By leveraging GVE’s expertise, you can ensure a successful and efficient renewable energy project that meets your needs and expectations.

#8. Expert Team: 

At GVE, our team of experienced professionals with in-depth knowledge of renewable energy systems, inverters, and energy storage solutions. 

#9. Training and Support:

GVE provides training and support for installers, engineers, and technicians, ensuring their partners and clients have the necessary skills to handle their systems.


Head Office: No. 22A Suez Crescent, Off Ladi Kwali Street, Wuse Zone 4 FCT-Abuja, Nigeria.

Winorac Engineering Building, Plot 34 Boskel Road, Port-Harcourt, Rivers State, Nigeria.

Phone: +234 909 222 7483, 09098887023

Email: info@gve-group.com

Website: https://gve-group.com 

Maintenance and Safety Precautions

Overloading an inverter can reduce performance, damage, or even fires. To avoid this:

  • Always calculate the total load capacity before connecting appliances.
  • Ensure the inverter is compatible with the type of loads you’re connecting.
  • Install overcurrent protection devices (OCPDs) or circuit breakers.
  • Regularly monitor the inverter’s performance and adjust loads accordingly.

In conclusion, understanding the load capacity of a 1.5kVA inverter is crucial for safe and efficient operation.

Trusting GVE with your inverter needs, you can ensure your inverter runs smoothly and powers your appliances without overloading. 

Remember to prioritize safety and take necessary precautions by following the recommended guidelines to avoid potential hazards.

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