In a perfect world, UK roofs would all face south, with a 35° pitch and no shading in sight. But we don’t live in a perfect world. As solar installers, we have to find clever ways to maximise the potential power from roofs of all make ups, orientations and shaded spots.
The most common suggestion to do this is with micro-inverters or power optimisers, which are designed to improve performance at the panel level. But there are risks, such as high costs to access and repair them if they fail, and sometimes you’re better off with a regular string inverter.
So which is the best solution? Let’s focus on the most popular brands, and compare SolarEdge optimisers vs Enphase micro-inverters.