What does the string number of a 20kw inverter mean

During the inverter sizing you need to take into account the different configuration limits, which should be considered when sizing the solar power inverter (Data from the inverter and solar panel data sheets). During the sizing, the temperature coefficient is an important factor.

The minimum string size, then, is 15 modules. The maximum string size is the maximum number of PV modules that can be connected in series and maintain a voltage below the maximum allowed input voltage of the inverter. The Module Voc_max is calculated using the coldest temperature when the modules produce the highest expected voltage.

This inverter has 2 MPPT trackers, so a total of 2 strings can be connected to the inverter. We know that there can only be 13 modules maximum installed. We can have one MPPT with 6 modules in a string and the other at 7 modules in a string. Check out UpTop Solar String Sizing Tool that does this for you!

In practice, the total capacity of your solar panels (DC size) should be a bit higher than the peak capacity of your inverters (AC size). For instance, if you have a solar system where each of the 20 panels has a max output of 370W (DC), you'll get 7400W, or 7.4 kW DC.

That's why, when it comes to designing efficient solar systems, inverter sizing is a paramount consideration. In this article, we'll take you through the essentials of inverters, their types, their power outputs, and the vital role played by the DC-to-AC size ratio in the optimal functioning of a solar system. What Are Inverters?

One method of max current is 1.25 X I sc. Locate the inverter's maximum PV power and the module's power. (4800 W) / (360 W) = 13 Maximum number of modules total After calculating the low and high limits, you now can finalize the array configuration within those limits.