Solar panel power systems are getting more and more popular around the world. Apart from the obvious main element – the solar panels – the other irreplaceable part of the design is an inverter, a device allowing the energy collected by the panels to be used as a current.
The inverter can be a part of the electrical grid and work as its part, but there are also off-grid inverters that work totally independently, providing power supply even when the grid is down. Choosing a proper inverter that fits the solar panel setup is the key to getting the most of the whole system.
A solar inverter is able to invert DC collected by the solar cells to AC that can be used by the power grid. To devise such as this has to be stable and resistant to current fluctuation. To ensure that, chokes are used within all inverters. Usually some toroidal common mode chokes are used, accompanied by smaller drum chokes.
There are two main types of solar system inverters: the ones with transformer and the ones without. The ones with transformers comes in another two types: low and high frequencies (LF and HF). The LF inverter has the transformer at the end of the circuit and work on 50Hz frequency, while the HF has the transformer mounted on the entry and work on 20-24Khz.
The transformerless inverters can work on a wider voltage spectrum, are smaller and cheaper. Although lacking the transformer requires the usage of an advances monitoring and safety devices.
4 Coils are making the toroidal and drum chokes and also sales all the othert components used in solar inverters.
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