AC Output Frequency

Specification
Updated 2026-08-24 · Read this page as Markdown

The nominal frequency of the alternating current the inverter delivers, in hertz — 50 Hz across most of the world and 60 Hz in North America and parts of Asia and Latin America. A grid-tied inverter synchronises precisely to the grid's own frequency.

Frequency is also a control signal, not just a nameplate value. Grid frequency rises when generation exceeds demand, and modern grid codes require inverters to reduce output as frequency climbs above nominal, then disconnect beyond a defined threshold. A hybrid inverter running an off-grid battery system can use the same mechanism in reverse, deliberately shifting frequency to tell AC-coupled PV inverters to throttle back when the battery is full. Check the frequency rating matches the region before importing hardware.

This spec across the catalog

Recorded on 40 models in this database. Most common values:

  • 50/60 ×27
  • 50 ×7
  • 50 / 60 ×4
  • 50 Hz / 60 Hz ×1
  • 60 ×1
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Related terms

AC Output Voltage The nominal alternating-current voltage the inverter produces at its output terminals, matched to the grid or load it serves. It is quoted per phase or between phases depending on whether the unit is single-phase or three-phase. Output Wave Type The shape of the alternating-current waveform the inverter produces: either a pure sine wave, matching what the utility grid supplies, or a modified sine wave, a stepped approximation. Grid-tied equipment is always pure sine wave. Total Harmonic Distortion (THD) A measure of how far the inverter's output waveform departs from a clean sine wave, expressed as the percentage of total signal energy sitting at harmonic frequencies rather than at the fundamental. Lower is better.

See also

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