Can a power inverter run a pressure washer?

Power requirements of high-pressure cleaners

High-pressure cleaners are high-power, high-power household cleaning equipment that people usually use to clean vehicles, house exteriors and other dirty surfaces.
It uses an electric pump or a fuel pump to increase the ordinary water pressure to a very high level, and then sprays a strong water flow through the spray gun to achieve a quick cleaning effect.

Most high-pressure cleaners on the market currently have an operating power range of between 1000 watts and 3000 watts, and some commercial high-pressure cleaners have even higher rated power. JCPOWER needs to remind you that there is an electric pump inside the high-pressure cleaner, which will generate an instantaneous power (starting power) at the moment of starting, and the current required at this time is 2-3 times that of normal conditions.

Let me give you an example: if you have a high-pressure cleaner with a rated power of 1500 watts, you may need an instantaneous power of 3000 watts to 4500 watts when you start it. This means that if your inverter cannot provide enough starting power, the high-pressure cleaner may not start normally, or it may cause the inverter to trigger the overload protection mechanism, and the inverter will not work properly.

How to choose an inverter suitable for a high-pressure cleaner?

An inverter is a current conversion device that converts direct current (DC) into alternating current (AC) to drive household appliances. Usually, the inverter will indicate two power parameters in the parameter table, namely rated power and peak power. Rated power refers to the power that the inverter can output continuously and stably for a long time when working, while peak power is the maximum power that the inverter can provide in a short period of time (usually only a few seconds). When choosing a suitable inverter for a high-pressure washer, you need to do the following:

1. Determine your power requirements: First, you need to check the rated power of your high-pressure washer and the maximum power required for startup. For example, if the rated power of your high-pressure washer is 2000W, then its startup power is between 4000W and 6000W. Therefore, you may need at least an inverter with a rated power of 3000W.
2. Check the parameters of the inverter: When you buy an inverter, the merchant will indicate the rated power and peak power of the inverter on the product page. The peak power of the inverter is usually twice the rated power.
3. Consider the battery capacity: The inverter needs to be paired with a battery to work. The high-pressure washer is a high-power device, and long-term operation requires a lot of battery power, so you need a battery with a large enough capacity to support the long-term use of the high-pressure washer. The calculation formula is in the content below, please continue reading.
4. Choose an inverter with protection function: high-quality inverters on the market are equipped with multiple protection functions such as overload protection, overheat protection, short circuit protection, etc. to protect the inverter from damage.

How much battery capacity does a high-pressure cleaner need?

If the power of your high-pressure cleaner is 2000W, it means that the inverter needs to run at 2000W. Usually, the conversion efficiency of an efficient inverter is 90%, so the actual operation of a 2000W high-pressure cleaner requires 2000W/0.9=2222W. If your battery voltage is 12V, the power required for the high-pressure cleaner to run for one hour is 2222/12=185AH. If the battery voltage you use is 24V, then it takes 2222/24=92.58AH to run for one hour.

The calculation formula is: required power/battery voltage = required current (AH)

JCPOWER reminds you: the input voltage of the inverter must be the same as your battery voltage. The higher the battery voltage, the less current the inverter needs per hour, and the higher the conversion efficiency.

Pure sine wave or modified wave?

JCPOWER recommends you to use a pure sine wave inverter. Why is a pure sine wave inverter recommended?

• Compatible with inductive loads: The core component of a high-pressure cleaner is the motor, which is an inductive load. Inductive loads have high requirements for the quality of the current waveform. The waveform output by a pure sine wave inverter is exactly the same as the mains power, which can provide a stable and pure power supply to the motor, ensuring efficient and stable operation of the motor.
• Extend the service life of the equipment: The pure sine wave current will not cause electromagnetic interference to the motor. Long-term use of impure waveform current by the motor will cause the motor to overheat, reduce operating efficiency, and even damage the motor. A pure sine wave inverter can effectively avoid these problems, allowing you to use the high-pressure cleaner without worry.
• Reduce noise: A pure sine wave inverter generates less noise when driving the motor.

Why is a modified wave inverter not suitable for a high-pressure cleaner?

• High-pressure cleaners require internal motor drive, and the operation of the motor requires a high quality of power supply. Compared with pure sine waves, the waveform output by the modified sine wave inverter has certain harmonic components, which will cause the following problems to the motor:
• Reduced motor efficiency: The current of the modified sine wave waveform will cause the motor winding to heat up, resulting in reduced motor efficiency or even overheating and burning.
• Increased motor noise: The harmonic components of the current will cause the motor to generate additional vibration and noise, affecting your user experience.

Shortened motor life: If the motor runs under impure waveforms for a long time, it will accelerate the wear of the motor and shorten its service life.

Conclusion

In summary, the inverter can be used to run the high-pressure cleaner, and the pure sine wave inverter is your best choice. The premise is that you must ensure that the output power and peak power of the inverter can support the normal operation of the high-pressure cleaner. You also need a battery with sufficient capacity to provide sufficient power.

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