What Is An Inverter ?

The energy storage inverter can be said to be the latest generation of inverters on the market today. As the name implies, energy storage is to convert AC power into DC power and store it in the battery. When a power failure occurs, the inverter will convert the DC power in the battery. It can be converted into alternating current for users, can provide users with two-way conversion between grid power and battery power, and can break through the limitation that photovoltaic inverters can only be used during the day, which is one of the important reasons why it is becoming more and more popular with users one.

What Does An Inverter Do ?

Inverters are also called AC Drives, or VFD (variable frequency drive). They are electronic devices that can turn DC (Direct Current) to AC (Alternating Current). It is also responsible for controlling speed and torque for electric motors.

Electric motors are found in most devices we use to do work such as small electronics, transportation, and office appliances. These motors need electricity to run. Matching the motor’s speed to the required process is essential to avoid wasting energy. In factories, wasted energy and materials could put the business at risk, and so inverters are used to control electric motors, boosting productivity and saving energy.

How Inverters Work ?

An AC drive works between a power supply and an electric motor. Power goes into the AC drive and regulates it. The regulated power is then sent to the motor.

An AC drive consists of a rectifier unit, a DC intermediate circuit, and an inverse conversion circuit. The rectifier unit inside an AC drive can be unidirectional or bidirectional. The former can accelerate and run the motor by taking energy from the electrical network. A bidirectional rectifier can take the mechanical rotation energy from the motor and send it back to the electrical system. A DC circuit will store the electrical power for the inverse conversion unit to use.
Before the regulated power is received by the motor, it undergoes a process inside the AC drive. The input power runs into a rectifier unit and the AC voltage is converted to DC voltage. The DC intermediate circuit smoothens the DC voltage. It then flows through the inverse conversion circuit to convert the DC voltage back into AC voltage.
This process allows the AC drive to adjust the frequency and voltage supplied to the motor depending on the demands of the process. The speed of the motor increases when the output voltage is at a higher frequency. This means that the speed of the motor can be controlled via the operator interface.

Benefits Of Using An Inverter

Breaking through the limitations of changing weather

Since the energy storage inverter can convert AC power into DC power and store it in the battery, and convert the DC power in the battery into AC power for users after power failure, this greatly reduces the impact of weather conditions on power generation stability. It can greatly improve the stability and quality of the power grid.

Have higher power efficiency

Compared with grid-connected photovoltaic inverters, energy storage inverters have higher power consumption efficiency, which can not only break through the limitations of weather conditions and time, solve the problems existing in grid-connected photovoltaic inverters, but also provide users with more stable , long-lasting power, avoiding the inconvenience and trouble caused by the failure of the power system, which is also an important reason why more users choose this inverter.

Have high stability

In the case of a grid system failure, the energy storage inverter can directly convert the stored DC power into an AC power supply grid system, which is less affected by external factors, can greatly reduce electricity costs, and has high stability. When in the peak period of power consumption, the energy storage inverter will convert the solar direct current into alternating current and feed it into the grid for the use of the majority of users; while in the low period of power consumption, the energy storage inverter will convert the alternating current in the grid The storage of direct current can realize the two-way conversion of direct current and alternating current, and can provide a strong guarantee for power consumption when the power is cut off.

Inverter Performance Parameters

Model SPF 3000TL LVM-24P SPF 3000TL LVM-48P
Battery voltage 24VDC 48VDC
RATED POWER 3000VA/ 3000W 3000VA/ 3000W
Parallel Capability Yes Yes
AC Voltage Regulation (Battery Mode) 120VAC ± 5% @ 50/60Hz 120VAC ± 5% @ 50/60Hz
Surge Power 6000VA 6000VA
Efficiency (Peak) 93% 93%
Waveform Pure sine wave Pure sine wave
Transfer Time 10 ms (For Personal Computers); 20 ms (For Home Appliances)
Maximum PV Array Power 2000W 4500W
MPPT Range @ Operating Voltage 30VDC ~ 115VDC 60VDC ~ 115VDC
Maximum PV Array Open Circuit Voltage 145VDC 145VDC
Maximum Solar Charge Current 80A 80A
Maximum Efficiency 98% 98%
Standby Power Consumption 2 W 2 W
Charge Current 60A 40A
AC Input Voltage 120 VAC 120 VAC
Selectable Voltage Range 95-140 VAC (For Personal Computers) ; 65-140 VAC (For Home Appliances)
Frequency Range 50Hz/60Hz (Auto sensing)
Dimension (D/W/H) in mm 130/350/455
Net Weight (kgs) 11.5
Humidity 5% to 95% Relative Humidity(Non-condensing)
Operating Temperature 0°C - 55°C
Storage Temperature 15°C - 60°C

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