24v power inverter

April 9, 2024

Basic principle and working mode of 24V inverter

A 24V inverter is a power conversion device that converts direct current (DC) voltage to alternating current (AC) voltage, usually used to convert 24V DC power to 110V or 220V AC power for daily use. Such devices are especially useful in places that are far from the grid, such as in vehicles, boats, solar power systems, and other off-grid applications. The following is a detailed introduction to the basic principle and working mode of 24V inverter:

Basic principle

The core working principle of the 24V inverter is to convert low-voltage DC power into high-voltage AC power using a series of electronic circuits. This conversion process usually involves two main steps: first convert 24V DC to higher voltage DC, and then convert this high voltage DC to alternating current. This process is mainly achieved through power electronic components such as transistors, MOSFETs, or IGBTs, which generate an output in the form of alternating current through fast switching operations.

Working mode

Dc to DC Boost stage: The inverter first uses a Boost Converter to raise the 24V DC voltage to the desired voltage level. This step is to adjust the voltage by controlling the electronic switch on and off.
Dc to AC conversion phase: The boosted DC will be fed into a circuit called the inverter bridge. The inverter bridge converts direct current to alternating current by rapidly turning on and off electronic switches (such as transistors) at specific frequencies and waveforms (usually sine waves or modified sine waves).
Control and regulation: In order to ensure that the output AC meets the requirements of use (such as voltage, frequency and waveform, etc.), the inverter will be integrated with a control circuit. These circuits monitor the output voltage and adjust the operation of the internal switching circuit to stabilize the output voltage and protect the device from problems such as overload and overheating.
Filtering: During the DC to AC conversion process, the output voltage may contain high-frequency noise or spikes due to the fast opening and closing of the electronic switch. Therefore, inverters usually install filters at the output to smooth out the output voltage, bringing it closer to the ideal AC waveform.

How to choose 24V inverter according to load demand?

When choosing a 24V inverter, a number of factors need to be considered to ensure that the inverter can meet the load demand and provide a stable and efficient power supply. The following are the main steps and considerations for choosing a 24V inverter according to load requirements:

Determine the load type

Pure resistive load: such as electric heaters, light bulbs, etc., these loads usually require a starting current similar to the running current.
Inductive loads: such as electric fans, air conditioners, refrigerators, etc., the starting current of these loads may be 3 to 7 times the running current, requiring the inverter to have sufficient starting capacity.
Capacitive load: Rare, but some special equipment may produce this load.

Calculate the total load power

Add the power of all the devices that need to be powered through the inverter to get the total load power. To ensure sufficient margin, it is recommended to add 20% to 30% capacity to the total load power to cope with possible future expansion or instantaneous power needs.

Select the inverter output waveform

Sine wave inverter: provides electrical waveform similar to the mains, suitable for the vast majority of electrical appliances, especially electronic equipment sensitive to electrical waveform, such as TV, stereo, microwave oven, etc.
Square wave or modified sine wave inverters: lower cost, but may cause some appliances to run unstable or damaged, generally only recommended for less sensitive simple loads.

Consider the efficiency of the inverter

The efficiency of the inverter affects the efficiency of its energy conversion and the overall energy consumption of the system. The high efficiency inverter can reduce the energy loss and improve the overall performance of the system.

Check for additional functional requirements

Protection function: overload protection, short circuit protection, overheat protection, low voltage and overvoltage protection, etc., can ensure the safety of use.
Remote control: Some inverters provide remote monitoring and control functions for easy management and maintenance.
Grid-connected function: If you need to use the inverter in parallel with the power grid or other energy systems (such as solar energy), you need to select the inverter with the corresponding function.

Consider future scalability

When choosing an inverter, taking into account the possible increased load in the future, choose an inverter with a certain margin, which can avoid frequent replacement of equipment due to expansion needs.

Learn about the different types and features of 24V inverters

24V inverters can be divided into several different types according to their output waveform, design and application, each type has its own specific characteristics and scope of application. Understanding these different types of inverters and their characteristics can help users make more appropriate choices according to their needs.

Sine wave inverter

Features: Produce sinusoidal waveform current similar to the mains, good compatibility, suitable for almost all types of electrical appliances, especially waveform sensitive electronic equipment, such as medical equipment, precision instruments, etc.
Scope of application: Widely used in the need for high electrical quality occasions, including home, office, industrial control, medical equipment and so on.

Modified sine wave (square wave) inverter

Features: The generated AC waveform is a modified sine wave (close to square wave), which is lower in cost than a pure sine wave inverter, but may lead to unstable operation of some sensitive equipment, larger noise, and slightly lower efficiency.
Scope of application: Suitable for non-sensitive electrical appliances, such as some simple kitchen appliances, lights, etc., not recommended for precision electronic equipment.

Multifunctional inverter

Features: Integrated with a variety of functions, such as charging, UPS (uninterruptible power supply), solar control, etc., can automatically switch working modes in different power supply scenarios.
Scope of application: Suitable for applications requiring multiple energy management and backup, such as home solar systems, small offices, etc.

High frequency inverter and low frequency inverter

High-frequency inverters: Using high-frequency switching technology, they are smaller and more efficient, but may not be as stable as low-frequency inverters when subjected to large loads or shock loads.
Low frequency inverters: Usually use larger transformers, larger weight and volume, but can better handle high starting current loads, such as power tools, motors, etc.

Grid-connected inverter and off-grid inverter

Grid-connected inverters: Designed to feed energy from solar power plants or other power generation systems into the grid, matching the frequency and voltage of the grid.
Off-grid inverter: suitable for places that cannot access the grid to provide power for independent systems, such as home use in remote areas, camping, ships, etc.

24V inverter installation process

Installing a 24V inverter is a process that requires careful operation, and the correct installation steps will not only ensure the best performance of the equipment, but also avoid safety hazards. The following is the installation process of 24V inverter:

1. Prepare

Read the manual: Before installing the inverter, read the inverter user manual carefully to learn about the installation requirements and precautions of the specific model.
Choose the right location: Install the inverter in a well-ventilated, dry location, away from direct sunlight, and close to the battery. Make sure there is enough space around the inverter for easy heat dissipation and maintenance.
Prepare installation tools and materials: Prepare proper installation tools, connection cables, fuses or circuit breakers, and support based on the recommendations in the manual.

2. Install the inverter

Fixed inverter: Fix the inverter to the selected position. Make sure it is firmly installed on a surface that will not cause vibration.
Connect the battery: Make sure all switches are off before connecting the battery. Connect the positive and negative input ends of the inverter to the corresponding terminals of the battery using a cable of the appropriate size. First connect the negative electrode, then the positive electrode. To prevent short circuit, it is recommended to install a suitable fuse or circuit breaker in the positive battery line.
Grounding: For safety, the inverter’s grounding terminal should be connected to a good ground point. This reduces the risk of electric shock and provides lightning protection.

3. Connect the load

Determine the load type and power: Before connecting the load, determine the type of equipment to be powered and the total power to ensure that the inverter can meet the demand.
Connect the load: Use the appropriate wiring to connect the load device to the output of the inverter. For situations where there are multiple loads, you may need to use a switchboard or multiway outlet.

4. Test and debug

Preliminary test: After connecting all lines, turn on the inverter power and check whether the indicator and display are normal.
Load test: gradually increase the load to observe whether the operating state and output voltage of the inverter are stable. Verify that the inverter can work properly under load.

5. Security check

Check connections: Make sure all wires are securely connected and there are no exposed wires.
Verify the protection function: Check whether the protection function of the inverter is reliable by simulating overload and short circuit.

6. Final confirmation

Verify that the inverter and all connected parts are properly installed and configured according to the manufacturer’s instructions.
Ensure that all installation steps comply with local electrical safety standards and regulations.

Necessary pre-installation preparation and safety considerations

Before installing a 24V inverter, it is very important to make adequate preparations and consider related safety matters. This not only ensures that the installation process goes smoothly, but also prevents potential security risks. The following are the necessary preparations and safety considerations before installation:

Necessary preparation before installation

Understand inverter specifications: Be familiar with the technical specifications and performance parameters of the selected inverter, including input voltage range, output power, efficiency, output waveform, etc.
Choose the right installation location: Choose a dry, well-ventilated, suitable temperature and avoid direct sunlight. Make sure there is enough space around the inverter for heat dissipation and for future maintenance work.
Obtain necessary tools and materials: Obtain installation tools, such as screwdrivers and pliers, and materials, such as cables, fasteners, and protection devices, based on the inverter installation requirements and manuals.

Safety consideration

Personal protection measures: Wear appropriate personal protective equipment during installation, such as insulating gloves, goggles, etc., to prevent electric shock or other accidental injuries.
Battery safety: Since the inverter is usually used with the battery, special attention needs to be paid to the safe handling of the battery to avoid short circuit, overcharge or overdischarge.
Inverter grounding: Correct grounding is the key to ensure the safe operation of the inverter. Ensure that the inverter’s ground terminal is connected to a reliable ground point to prevent electrical failure and provide lightning protection.
Electrical connections: Make sure all electrical connections are correct and follow the inverter manufacturer’s instructions. Improper connections can result in damage to the device or fire.
Prevent overload: the output power of the inverter should match the load demand to avoid overload operation. Overload may cause the inverter to overheat or even damage.
Check protection functions: Ensure that the inverter is equipped with necessary protection functions, such as overload protection, short circuit protection, overheat protection and low voltage protection.
Ventilation and heat dissipation: Ensure that the inverter installation position has good ventilation conditions to avoid overheating.

Check list before installation

Verify that the inverter is compatible with the load.
Check that all cables and accessories are intact.
Ensure that the installation position and method meet safety and heat dissipation requirements.
Prepare safety equipment and first aid tools for possible emergencies.

Guidelines for the safe use of 24V inverters

In order to ensure the safe use of 24V inverters, a series of guidelines and safety measures need to be followed. These principles are designed to protect users, equipment, and the surrounding environment from electrical hazards and failures. The following are guidelines for the safe use of 24V inverters:

1. Follow the manufacturer’s guidelines

Carefully read and follow all installation and operating instructions provided by the inverter manufacturer. Only the correct installation and use of the inverter can ensure its safe and efficient operation.

2. Install it properly

Ensure that the inverter is installed in a well-ventilated, dry, dust-free area and away from direct sunlight. Improper installation positions can cause the inverter to overheat and degrade performance.
Follow the inverter’s grounding instructions for proper grounding to prevent electrical failure and improve the overall safety of the system.

3. Use suitable cables and connectors

Use the manufacturer’s recommended cable sizes and types, as well as suitable connectors, to ensure that all electrical connections are strong and reliable.
Install protective devices such as fuses and circuit breakers to prevent overload and short circuits.

4. Avoid overload

Do not exceed the maximum output power of the inverter. Overloading the inverter may cause equipment damage or even fire.
Check the load requirements regularly to ensure that the inverter is not overloaded by the addition of new appliances.

5. Perform regular maintenance

Check inverter and battery connections regularly to clean dust and corrosion and ensure all connections are clean and tight.
Monitor the working condition and environment of the inverter and pay attention to any unusual sounds, smells or overheating.

6. Avoid contact with water

Keep inverters and all electrical equipment away from water sources. Wet conditions increase the risk of electric shock and equipment damage.

7. Prevent misuse

Do not attempt to repair or modify the inverter yourself. If the inverter fails, a professional or manufacturer should be contacted for repair.
Avoid using inverters for non-designed purposes, such as driving high-power industrial equipment or sensitive medical equipment, unless the inverter is clearly labeled for use.

8. Be vigilant with sensitive appliances

While many inverters are designed to support a variety of appliances, some sensitive devices may require a specific type of power waveform (such as pure sine waves). Before connecting such devices, ensure that the output of the inverter matches the requirements of the device.

Application case analysis of 24V inverter

Due to their ability to convert direct current to alternating current, 24V inverters are widely used in a variety of situations, from home use to commercial, industrial, and even mobile environments such as vehicles and ships. Below are a few specific application case studies that show how 24V inverters can meet different needs.

Home solar system

In a home solar power system, the direct current generated by solar panels needs to be converted into alternating current used by household appliances. A family installs a set of solar panels, which are charged to a 24V battery pack through a charging controller, and then converted into 220V or 110V alternating current through an inverter for household appliances such as lights, televisions, refrigerators and so on. In this case, the use of pure sine wave inverters can ensure the normal operation of electrical appliances, but also improve the efficiency of energy utilization.

Remote monitoring site

In remote areas, such as weather stations and communication relay stations, there is often a lack of stable grid power supply. These sites can deploy 24V-based battery storage systems, in conjunction with inverters, to ensure the power supply of critical equipment such as sensors and communication equipment. The inverter here acts as a bridge between direct current and alternating current, ensuring stable operation of the equipment.

Mobile office and entertainment systems

In mobile environments such as motorhomes and yachts, 24V inverters provide a convenient power solution that allows appliances such as laptops, microwave ovens, and air conditioners to be used far from the grid. For example, in a motorhome equipped with solar panels and a 24V battery system, the inverter can provide a stable alternating current, making life comfortable and convenient on the road.

Emergency rescue equipment

In emergency rescue and disaster response occasions, such as the rescue site after earthquakes and floods, 24V inverters can extract power from vehicle batteries and convert it into alternating current to supply critical rescue equipment such as emergency lighting, medical equipment, and communication equipment. In this case, the reliability and stability of the inverter is crucial.

Agricultural and fishery applications

In farmland, fishing boats and other places, 24V inverters can provide power support for irrigation equipment, fish detectors and so on. Especially on remote farms or at sea, inverters combined with solar panels and battery systems can greatly reduce the reliance on traditional generators and achieve a more environmentally friendly and economical operating model.

Examples of applications in home and business environments

24V inverters are widely used in home and business environments to provide flexible and efficient power solutions. Below are some specific application examples that show how 24V inverters can be utilized in these environments.

Home Application Example

Solar home systems: Homes install solar panels that convert solar energy through inverters into alternating current that can be used for everyday appliances, such as TVS, refrigerators, washing machines, etc. Such systems can significantly reduce the cost of electricity for households and increase energy independence.
Home entertainment and office: When in a motorhome or camping, 24V inverters can power devices such as laptops, mobile device chargers, small printers and so on, making entertainment and office in outdoor activities or travel possible.
Emergency power supply: In the case of power failure or disaster, the inverter combined with the battery can be used as a backup power supply for the family, supporting the operation of lighting, communication equipment and some basic household appliances to ensure the basic life needs of the family.

Business environment application examples

Remote office location: In remote construction sites or field sites, 24V inverters can supply power to office computers, printing equipment, communication equipment, etc., to support the daily office and data transmission needs of the site.
Commercial exhibitions and mobile sales: In exhibitions or mobile sales vehicles without stable grid power supply, inverters can provide power for display screens, cash registers, mobile payment devices, etc., to support the smooth progress of commercial activities.
Agricultural and fishery equipment power supply: In commercial operations such as farms and fishing boats, inverters can provide stable power for irrigation systems, fish detectors, temperature control systems for storage facilities, etc., improving production efficiency and product quality.
Security and monitoring systems: Security monitoring systems in commercial buildings, such as cameras, alarm systems, etc., often require 24 hours of uninterrupted power supply. In the case of grid instability or power failure, the inverter combined with the battery system can ensure the continuous operation of these systems.