Microinverter
Small inverter mounted directly on a single solar module, converting DC to AC on a per-module basis.
Also known as: Micro-Inverter, Module-Level Inverter
What Is a Microinverter?
A microinverter is mounted directly on the back of a single solar module and converts its direct current into alternating current immediately. Unlike a string inverter, each module operates independently.
How It Works
Each solar module receives its own small inverter with an integrated MPP tracker. The AC outputs are connected in parallel and fed directly into the home grid. As a result, the performance of one module does not affect the others.
Advantages and Disadvantages
| Advantages | Disadvantages |
|---|---|
| Optimal yield under shading | Higher cost per Wp |
| Module-level monitoring | Maintenance on the roof more difficult |
| No high voltage on the roof | Slightly lower efficiency |
| Flexible expandability | More electronics on the roof (heat) |
| Enhanced safety | — |
Applications
Microinverters are ideal for:
- Balcony solar systems and small installations
- Partially shaded roofs with trees, chimneys, or dormers
- Complex roof geometries with different orientations
- Systems that will be expanded gradually
Practical Tip
For balcony solar systems up to 800 watts, microinverters are the standard. For larger systems without shading issues, a string inverter is usually more economical.
Related Terms
String Inverter
Central inverter that converts the direct current from one or more series-connected module strings into alternating current.
Hybrid Inverter
Inverter that combines PV electricity generation, battery storage, and grid feed-in in a single device.
Balcony Solar System
Small plug-in solar device (up to 800 W) mounted on a balcony or facade that feeds electricity directly into the home grid.
Shading
Partial or complete shading of solar modules by trees, buildings, or other obstacles.
Efficiency
Ratio of usable electrical energy to incident solar energy -- indicates the effectiveness of a solar cell or system.