SAM Photovoltaic Inverter

What is a Sam photovoltaic model?

SAM Photovoltaic Models - System Advisor Model - SAM. The detailed photovoltaic model calculates a grid-connected photovoltaic system's electrical output using separate module and inverter models. It requires module and inverter specifications along with information about the number of modules and inverters in the system.

Can SAM model a system with more than one inverter?

For photovoltaic systems with more than one inverter, SAM models the inverters as a single large inverter that operates with the array DC string voltage as the inverter’s input voltage. SAM cannot model a system with more than one type of inverter.

What is Sam's Sandia inverter model?

The SAM (System Advisor Model) by Sandia uses the Sandia Inverter model, which is an implementation of the empirical model described in King (2007).

How does SAM calculate the AC power output?

SAM calculates the AC power output of all inverters in the system by using one of the inverter models listed in Section 12.1. For systems with multiple inverters, SAM models the inverters as a single large inverter that operates with the array DC string voltage as its input voltage.

Where can I find a Sam photovoltaic model technical reference report?

The SAM Photovoltaic Model Technical Reference report is available at no cost from the National Renewable Energy Laboratory (NREL). It can be found on their website at

How do I choose a photovoltaic module and inverter?

You can either provide your own module and inverter specifications from a manufacturer's data sheet, or choose a module and inverter from libraries. The detailed photovoltaic model estimates losses due to the effect of temperature on module performance, and has options for calculating shading and other losses in the system.