What is the difference between UPS and solar inverter? - SCU

What is the difference between UPS and solar inverter?

Uninterruptible power supply and inverter are very different. Ups and solar inverters are different in composition and use, and the most obvious is that they are completely different in power on mode.What is the difference between solar inverter and UPS.
Different power on methods

  • The inverter power supply is converted from DC to AC, and UPS has three modes: bypass mode, mains mode and battery mode.
  • Generally speaking, the inverter is just a simple converter without any electrical impurities. The device that converts DC to AC is called inverter
  • The bypass mode of UPS is to connect the power supply directly without the UPS host. The mains mode is that the mains power passes through the rectifier of the machine, filters out the impurities in the mains power, and then outputs it to the equipment through the inverter of the host, while the battery mode is that the inverter DC (battery power) is output to the equipment, so that the equipment is well protected.
  • The inverter power supply system and the uninterruptible power supply system have roughly the same functions and principles. They can realize the following two functions:
    1) Provide a way to adjust voltage changes, eliminate various electrical interference, and provide high-quality power supply;
    2) In case of AC mains power failure, necessary backup power capacity can be guaranteed. The biggest difference between the two is that the UPS needs to be equipped with a battery pack, and the backup time is short, while the inverter power supply does not need to be equipped with a battery, and it can directly use the DC screens at all levels of the communication machine room. The capacity is large, which can ensure that the network can operate continuously for a long time.
    Different components
  • solar inverter: it consists of inverter device.
  • Uninterruptible power supply: main circuit, bypass, battery and other power input circuits, rectifier for AC/DC conversion (REC), inverter for DC/AC conversion (INV), inverter, bypass output switch circuit and energy storage battery.
    Different uses
    A solar inverter or PV inverter, is a type of power inverter which converts the variable direct current (DC) output of a photovoltaic (PV) solar panel into a utility frequency alternating current (AC) that can be fed into a commercial electrical grid or used by a local, off-grid electrical network. It is a critical balance of system (BOS)–component in a photovoltaic system, allowing the use of ordinary AC-powered equipment. Solar power inverters have special functions adapted for use with photovoltaic arrays, including maximum power point tracking and anti-islanding protection.
  • Uninterruptible power supply: used in mines, aerospace, industry, communications, national defense, hospitals, computer service terminals, network servers, network equipment, data storage equipment, emergency lighting systems, railways, ships, transportation, power plants, substations, nuclear power plants, fire safety alarm systems, wireless communication systems, program-controlled switches, mobile communications, solar energy storage energy conversion equipment, control equipment and their emergency protection systems.
    Different working principles
  • Solar inverter: realize DC input and then output AC power. The operating principle is the same as that of switching power supply, but the oscillation frequency is within a certain range. For example, if the frequency is 50HZ, the output is 50HZ alternating current. Inverter is a device that can change frequency.
  • Uninterruptible power supply: The rectifier adopts silicon controlled rectifier or high-frequency switch rectifier, which has the function of controlling the output amplitude according to the change of external power supply, so that when the external power supply changes (the change should meet the system requirements), the output amplitude is basically unchanged. The purification function is completed by the energy storage battery. Because the rectifier’s interference to the instantaneous pulse cannot be eliminated, there is still interference pulse in the rectified voltage.

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