24 Three-Phase Inverter Manufacturers in 2025
This section provides an overview for three-phase inverters as well as their applications and principles. Also, please take a look at the list of 24 three-phase inverter manufacturers and
SMA Sunny Boy German manufacturer SMA Solar Technologies was widely regarded as the best string inverter manufacturer before the Fronius snap-in series took the top spot in 2016. However, the new Sunny Boy AV series regained some market share after SMA relocated all manufacturing back to Germany in 2019.
These high-efficiency, single-phase inverters range from 2.5kW to 5kW and are notable for their low start-up voltage of 35V. This allows them to function effectively during the early morning and late evening hours, outperforming competitors like Fronius' equivalent 5kW inverter, which starts at 80V.
As the first A-share company in China with string inverters as its main business, Solis has not only achieved remarkable results in the Chinese market, but also won wide recognition and praise globally.
String inverters are a type of solar inverter used in photovoltaic (PV) systems for converting the direct current (DC) output of a string of solar panels into alternating current (AC) electricity that's fed into the power grid, used by the local electrical network, or in off-grid solar power systems.
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