Ratios range from conservative (0. 9, where the inverter is larger than the array) to aggressive (1. 2 means your panels can theoretically produce 20% more power than your inverter can output. Why intentionally "undersize" your inverter? Solar panels. For grid-tied systems, the standard approach is choosing an inverter with an AC rating roughly 75–85% of your total DC panel capacity, giving you a DC-to-AC ratio around 1. The details. In this guide we will explain how to size a solar inverter, define key terms like the DC-to-AC ratio and clipping, compare inverter types, and provide practical tips for choosing the right unit for your site and goals.
