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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

Use sample site

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.

Advanced inputs
Reset to default values

* Required field

* Typical load

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

Building Details

Sample custom load profile

Chart typical load data

* Outage information

Autoselect using critical load profile
Reset to default values
Advanced inputs
Reset to default values

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
Advanced inputs
Reset to default values
Advanced inputs
Reset to default values

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
Advanced inputs
Reset to default values
 
Advanced inputs
Reset to default values
Reset to default values
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