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REopt Lite

The REopt™ Lite web tool helps commercial building managers:

  • Evaluate the economic viability of grid-connected PV, wind, and battery storage at a site
  • Identify system sizes and battery dispatch strategies to minimize energy costs
  • Estimate how long a system can sustain critical load during a grid outage.

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.

Step 0: Login and Gather Data

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 location


  

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 duration


  

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

Step 1: Choose Your Focus

Do you want to optimize for financial savings or energy resilience?


Step 2: Enter Your Site Data

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)

Energy Cost
($/kWh)

Demand Cost
($/kW/month)

January
February
March
April
May
June
July
August
September
October
November
December

You must be logged in to create a Custom Tariff.

* Required field

* Typical load

How would you like to enter the typical energy load profile?

Building Details


Step 3: Select Your Technologies

Which technologies do you wish to evaluate?


 

Capital Cost or System Size Based Incentives

Database of state incentives for renewables
Incentive based on percentage of cost (%) Maximum dollar amount for incentive based on percentage of cost ($) Rebate based on system size ($/kW) Maximum dollar amount for rebate based on system size ($)

Unlimited

Unlimited

Production Based Incentives

Production incentive ($/kWh) Incentive duration (yrs) Maximum incentive ($) System size limit (kW)

PV Incentives and Tax Treatment

Tax Treatment

Capital Cost or System Size Based Incentives

Database of state incentives for renewables
Incentive based on percentage of cost (%) Maximum dollar amount for incentive based on percentage of cost ($) Rebate based on system size ($/kW) Maximum dollar amount for rebate based on system size ($)

Unlimited

Unlimited

Production Based Incentives

Production incentive ($/kWh) Incentive duration (yrs) Maximum incentive ($) System size limit (kW)

Wind Incentives and Tax Treatment

Tax Treatment