How to Choose the Operating Mode of Solar Inverter?

Usually solar inverters have three working modes, PV (battery) priority, mains priority and ECO mode. So which working mode can maximize the use of photovoltaic energy and meet customer requirements as much as possible?

What are the working modes of solar inverters?

Battery (solar) priority mode

  • When the solar inverter battery is fully charged, the load will be powered by the battery even if the mains is normal. When the battery is at low voltage and the mains is stable, the inverter will switch to the mains priority mode.
  • The solar inverter load preferentially uses the energy provided by the photovoltaic. When the photovoltaic power generation rate is less than the load, the insufficient part is supplemented by the battery, and the photovoltaic and the battery share the load to supply power.

Solar inverter mode

Application area: This mode is used in areas with no or less electricity. Mains electricity is expensive and frequent power outages. It is important to note that the inverter will switch to utility power when it needs to use the battery to a lower value. The advantage of this mode is that the solar energy can be fully utilized. The disadvantage is that the user's electricity consumption cannot be fully guaranteed. When the battery voltage is low and the mains is abnormal, no electricity can be used. If the user's demand for electricity is not particularly high, this mode can be selected.

Mains priority mode

When the utility power is normal, the utility power charges the battery, and the load provides a stable power supply after the utility power is stable. When the mains is abnormal, the load is powered by the battery. Application field: This mode is used in places where the mains voltage is stable, the price is cheap, but the power supply time is short. Solar energy storage is equivalent to a backup UPS inverter.

The advantage of this mode is that the system can be equipped with fewer solar panels, and the initial investment is low. The disadvantage is that photovoltaic energy wastes a lot, and it may not be used in many cases.

ECO (Energy saving) mode

The solar inverter works in battery mode, and the load capacity is lower than 10% of the rated power of the inverter, the inverter will start and stop regularly to achieve energy saving effect. When the frequency load is greater than 10% of the rated power of the inverter, the inverter will exit the energy-saving mode.

Application: In the case of low power consumption, the inverter energy saving mode can be selected.

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