A hybrid inverter combines the tasks of an inverter with those of a solar battery. It can therefore both adjust the polarity of the current and temporarily store a certain amount of current.
Solar systems generate direct current due to the system. However, the direct current generated must be converted into alternating current to operate most technical devices or to feed them into the public power grid. This is the task of a solar inverter.
Some solar systems have an intermediate storage unit in order to be able to make generated electricity available at a later point in time.
With a hybrid inverter, a distinction can be made between single-phase and three-phase models.
Single-phase hybrid inverters usually have an output power of 350 to 4,000-volt-amperes. They provide the missing energy from the battery. This is then drawn in all three phases.
Three-phase hybrid inverters have 3,400 VAC three-phase outputs. The nominal power is 4,200 to 24,000 volt-amperes.
Although changing the polarity of the current is the primary job of an inverter, this device has another very important job.
By varying the power resistance, the relationship between current and voltage in the solar cell is changed in such a way that the product of these two parameters is maximized. This product represents the usable power of the solar cell.
If a solar cell achieves the maximum possible output, this is referred to as reaching the “ Maximum Power Point ”, or MPP for short. The inverter thus ensures that the solar cells can be operated close to the MPP for as long as possible.
A hybrid inverter has the task of converting direct current into alternating current. Compared to a conventional inverter, it can temporarily store the electricity using internal or external storage.