The REopt™ Lite web tool helps commercial building managers:
REopt Lite offers a no-cost subset of features from NREL's more comprehensive REopt model. REopt Lite also offers an application programming interface (API). Send questions and tool feedback to REopt@nrel.gov.
Registering and logging in is optional, but you must be logged in to:
save your evaluations
create a custom electricity rate
build a critical load profile
manage your typical and critical load profiles
Data needed for a Financial run:
site electricity rate
building type plus annual energy consumption OR a custom load profile
Additional data needed for a Resilience run:
critical load factor OR custom critical load profile OR critical load components to build a profile
outage start date and time (can be taken from your critical load profile)
* For all non-required inputs, the gray default values will be used unless you enter custom inputs
Do you want to optimize for financial savings or energy resilience?
Enter information about your site and adjust the default values as needed to see your results.
* Required field
Energy Cost ($/kWh)
Demand Cost ($/kW/month)
You must be logged in to create a Custom Tariff.
How would you like to enter the typical energy load profile?
Sample custom load profile
How would you like to enter the critical energy load profile?
The Critical Load Builder allows you to build, edit, and manage your load profiles.
You must be logged in to build a critical load profile. Login or register
Which technologies do you wish to evaluate?