Solar Technology
Solar Inverters Explained
The inverter is the heart of a solar system. Learn the differences between grid-tie, off-grid and hybrid inverters and what to look for.
1 min read
Solar panels produce direct current (DC). Homes, businesses and the grid use alternating current (AC). The inverter converts one to the other and, in many systems, also manages batteries and monitoring.
Main inverter types
- Grid-tie inverters work with the utility grid. They supply your loads from solar and, where permitted, export surplus. For safety they shut down when the grid fails.
- Off-grid inverters create their own AC supply from batteries, for sites without a grid connection.
- Hybrid inverters combine both: they can work with the grid, charge and discharge batteries, and provide backup power during outages.
- Microinverters and optimisers work at the level of individual panels, which can help on roofs with partial shading.
What to look for
- Rated power that matches the panel array and your loads
- Number of MPPT inputs for different roof orientations
- Battery compatibility if you plan to add storage
- Pure sine wave output for sensitive equipment
- Monitoring features and warranty terms
Placement
Inverters should be installed in a shaded, ventilated location, as heat reduces efficiency and lifespan.
