In most cases, the inverter size should be close to the size of your solar panel system, within a 33% ratio. For example, a 6.6kW solar array often pairs with a 5kW inverter to balance efficiency, cost, and performance.. The capacity of an inverter is the maximum power output it can handle, usually measured in kilowatts (kW) or kilovolt-amperes (kVA). The goal is to match the inverter capacity with the solar array's size (in terms of power output) and the load (electricity demand) to ensure optimal performance.. The DC-to-AC ratio — also known as Inverter Loading Ratio (ILR) — is defined as the ratio of installed DC capacity to the inverter's AC power rating. It often makes sense to oversize a solar array, such that the DC-to-AC ratio is greater than 1. This allows for a greater energy harvest when. . The DC-to-AC ratio (also called the inverter loading ratio) compares your solar array's capacity to your inverter's AC output rating. A ratio of 1.2 means your panels can theoretically produce 20% more power than your inverter can output. Why intentionally "undersize" your inverter? Solar panels. . The DC/AC ratio is the size relationship between the total DC power of your solar panels and the AC power rating of your inverter. It represents the relationship between the nominal direct current (DC) capacity of your solar panel array and the alternating current (AC) output capacity of your solar inverter. In simple. . Sizing your solar system appropriately, specifically the DC-to-AC size ratio, can help mitigate clipping. It is best when the total capacity of your solar panels (DC size) is slightly bigger than the peak capacity of your inverters (AC size). To set up an efficient solar system, we recommend a.