Why are my yield graphs capped?

Sometimes your solar yield graphs may appear capped or flattened at the top. This happens when your inverter has reached its maximum output capacity, while your solar panels could still produce more under optimal conditions. The inverters installed by Zonnefabriek are designed to perform efficiently even when operating at full capacity.

At Zonnefabriek, we often choose to install an inverter with a slightly lower capacity than the peak output of your solar panels. This is a deliberate and well-considered choice. It may seem counterintuitive at first, but this setup typically results in more total energy production over the entire year. At the same time, it helps reduce your installation costs, since a smaller inverter is less expensive.

This approach is based on how solar energy systems actually perform throughout the seasons. Peak production – when your panels generate their absolute maximum – only occurs during brief moments of full sun, often in the middle of a clear summer day. For the rest of the year, your system will operate well below those peak levels. By slightly undersizing the inverter, we ensure that it runs at higher efficiency for more hours per day, especially in spring and autumn.

Want to know more? Read here why your inverter is smaller than the peak power of your solar panels – and how that actually helps you produce more energy across the year.