Solar Labs' updated version now comes with an integrated Wire Size calculator which helps user not only in SLD and 3LD, but also in permit drawings approvals.
Follow below given steps to access Wire Size Calculator:
Click on the cables icon from the left side toolbar in the design studio. (shown below)
Input the parameters required to create the SLD according to your Solar power plant. User has flexibility to turn on the toggles for additional equipments for detailed SLD.
Click on Save to save the input sizing parameters and then click on studio to enter the design studio page.