The inverter is the brain of your solar panel system — it converts the DC electricity your panels generate into the AC electricity your home uses. Choosing the right inverter can make a significant difference to your system's performance, monitoring capabilities and long-term reliability. Here's what Cardiff homeowners need to know.
The Three Main Types of Solar Inverter
String Inverters
- Lowest upfront cost
- Simple, proven technology
- Easy to maintain and replace
- Whole string affected by shading on one panel
- Less detailed panel-level monitoring
Power Optimisers (DC Optimisers)
- Panel-level optimisation
- Minimises shading losses
- Detailed panel-level monitoring
- Higher cost than string inverters
- More components to potentially fail
Microinverters
- Maximum panel independence
- Best for complex roof shapes
- Excellent monitoring
- Highest upfront cost
- More components on the roof
Which Inverter is Most Popular in Cardiff?
Based on our Cardiff installations, SolarEdge with power optimisers is the most popular choice — particularly for the Victorian and Edwardian terraces that dominate areas like Roath, Cathays and Canton. These properties often have chimneys, dormer windows or neighbouring buildings that cause partial shading, and SolarEdge handles this brilliantly.
For newer properties in Pontprennau, Whitchurch and Llanishen with clean, unshaded south-facing roofs, a quality string inverter from Fronius or Growatt often delivers excellent value without the premium cost of optimisers.
Inverter Warranties: What to Look For
Inverter warranties vary significantly between brands. Here's what to expect:
Not Sure Which Inverter is Right for You?
Our Cardiff solar engineers will assess your roof, shading profile and energy usage during your free survey and recommend the best inverter for your specific situation.