An Introduction to EPEVER UPOWER Series Inverter/Chargers

Inverters are employed to convert the DC power to AC power, providing the required voltage and frequency at the output. Inverters can be considered as power adapters. So they are considered as one of the important parts of a photovoltaic system, which supplies AC power for any appliance.

Charge controllers are also utilized to convert the solar energy from the panels to electricity, which is essential to charge the batteries in a PV system. Solar chargers get the electricity from the solar panels and control for everything, to make sure that the batteries are charged most efficiently and healthily.

Sometimes, the amount of energy absorbed by the solar panels is not enough to charge the battery for the proper operation of household appliances. Therefore, an additional source of energy is necessary to provide energy for the photovoltaic system. A hybrid charger/inverter puts the operation of an inverter and a charge controller together which is an all in one solution. However, this is not the only advantage of hybrid devices. In this article, we will get to know more about hybrid inverter charger and their advantages.

As mentioned, the inverter converts DC (battery) power into AC power and then passes it along to the appliances. An inverter/charger does the same; however, it is also capable of receiving the charge from external AC sources. When the input AC power is unavailable, a hybrid inverter/charge switches to battery mode. This is similar to Uninterrupted Power Suppliers (UPS) functions.

The UPOWER series of EPEVER is a new type of so-called inverter/chargers, combining the solar & utility/ external AC input and provide means for a more reliable solar off-grid system.

UPOWER, adopts a multi-core processor design and an advanced MPPT control algorithm to enhance the capabilities of the solar set. It has the features:

  • High response speed
  • High reliability and
  • High industrialization standard.

It offers four charging modes including:

  • Solar priority
  • Utility priority
  • Solar and
  • Utility & Solar

Two output modes for Battery and Utility enables this device to meet various application demands. The up-to-date optimized MPPT tracking technology is adopted for the PV charging modules. It can quickly track the maximum power point of the PV array in any environment and acquire the maximum energy of solar panels in real-time.

The advanced control algorithm is adopted for AC-DC charging modules. It realizes fully digitalized double closed-loop control for voltage and current, with high a high accuracy control system.

The input range of AC voltage is wide enough to cover different types of sources. The output DC charging voltage/current is continuously adjustable in a certain range, and the complete input/output protection functions can offer a stable and reliable charging profile and charging protection for the batteries. This feature will lead to high charging conversion efficiency, which is more than 98% in all types of EPEVER UPOWER series. Besides, the power loss is minimized by the efficient AC-DC conversion. The DC-AC module is based on full digital and intelligent design. It adopts the advanced SPWM technology, resulting in a pure sine wave output and converts 24/48VDC to 220/230VAC, suitable for AC loads of household appliances, electric tools, commercial units, electronic audio, and video devices, etc.

The product adopts a 4.2-inch LCD display design, which displays real-time operational data and parameters. Comprehensive electronic protection functions ensure the highest level of safety and stability.

Figure 1- EPEVER UPowe Series Inverter/Charger

Features of EPEVER UPOWER Series Inverter/Charger

In this section, we will introduce the features of UPOWER series, which make them a proper choice for cold and cloudy climate conditions. Such places suffer from lack of a clear sky or sunny days, so for home appliances, which need solar power to work, an additional power source is necessary. UPOWER series benefit from the additional power sources, which can be an AC utility or power generator. The prominent feature of the UPOWER series is to combine the external AC power with solar power to enhance the reliability of the system. In places with higher rates of cloudy sky, it’s not efficient enough to use the external generator all the time in terms of cost and maintenance. This ensures efficient use of the solar system while reducing the run time and costs of external power sources. Cold and cloudy climate conditions restrict the application of solar energy in noticeable parts of the year, so the external AC power source or electrical generator provides energy for the household appliances when the amount of solar energy is not enough for the proper performance of the appliances.

Some of the main features of EPEVER UPOWER Series Inverter/Chargers are highlighted here which implies the priorities of these inverter/chargers over conventional ones:

  • Adoption of the advanced SPWM technology, with pure sine wave output.
  • Fully digitalized voltage and current double closed-loop control.
  • Advanced MPPT technology, with efficiency no less than 99.5%.
  • Advanced control algorithm, with efficiency no less than 98%.
  • LCD design that enables the realtime display of system operating status.
  • Provided with common interface and advanced interface.
  • Multiple LED indicators instantly indicate the operating state of the system.
  • 2P circuit breaker provided at the utility input end.
  • Independent control of AC output by AC OUT button.
  • Battery temperature compensation function.
  • Extensive Electronic protection.
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