PV and Battery costs have been updated as of mid-June 2025. See the relevant tool tips and Help/User Manual sections 10.1 and 11.1 for more information.

The REopt^® web tool allows users to:

• Evaluate the economic viability of distributed energy resources (DERs) for a building, campus, or microgrid.
• Identify DER system sizes and dispatch strategies to minimize energy costs and achieve renewable energy & emissions and resilience goals.
• Calculate the emissions impact of on-site energy generation, storage, and electrification.
• Estimate how long a system can sustain critical load during a grid outage.