Energy Modeling Overview

Every solar system typically has production values estimated using a combination of the loss assumptions, field layout, and the energy model. To make a truly best in class energy estimate, one needs a bankable energy model combined with robust assumptions and an accurate-to-construction field layout and shading scene. At Solesca, we offer two models as well as robust default assumptions to allow you the versatility of quick and free energy simulations when rapidly designing as well as the opportunity to stay in our tool and use DNV's bankable energy model engine SolarFarmer.

Our assumptions within the Generic templates are all approved by SolarFarmer. Using these assumptions are recommended unless you have defensible evidence for deviating (such as our auto-stringing DC wiring losses). We recommend even when creating your own template that you use our assumptions to ensure accuracy.

System Advisory Model (SAM) Simulation

Solesca uses NREL's SAM model for the Solesca Simulations. Simply create an array and all the layout values as well as advanced loss assumptions are used to create an energy estimate. Everything but the object near shading is handled by SAM. We have built an internal algorithm to model the object (obstruction, rooftop, tree) near shading to insert into the SAM model, ensuring that all of the losses are properly accounted for.

DNV's SolarFarmer Simulation

Solesca is integrated with DNV's proprietary model SolarFarmer. You can pay 0.1 SOL Credits to have the energy estimate be Powered by SolarFarmer's proprietary engine. DNV has sucessfully finaced 2GW of projects through lenders so far and are on track to certify 1TW by the end of the year.

To use, click the sun icon next to the simulate button. This will allow you to use the best-in-class base model for your energy assessment. This model is currently available in 2D with 3D to come 2026. You have the option to use our object near-shading as additional dc losses (recommended) to be as accurate as possible. We have been certified by DNV's SolarFarmer team directly for the integration so you can rest assured that the same model that DNV is using for their desktop app and same accuracy is found natively within Solesca. The validation docs are available upon request.

A few notes before running:

• SolarFarmer requires user-uploaded PAN and OND files or the files provided by DNV to run.
• SolarFarmer 2D does not support EW racking configurations nor dual-axis tracking.
• SolarFarmer does not support FT arrays and SAT arrays in the same simulation.
• SolarFarmer 2D does not support different azimuth and tilts for strings going to the same inverter.

The SolarFarmer 2D specific issues will be resolved once we integrate their 3D model.