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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 1: Choose Your Focus

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


Step 2: Enter Your 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.

Enter 0 if net metering is not available

Show more inputs
Reset to default values

* Required field

* Typical load

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

Chart typical load data
View critical load profile
 

 
The following inputs are not factored into the optimization but appear in the results as costs and benefits.
Reset to default values
Show more inputs
Reset to default values

Step 3: Select Your Technologies

Which technologies do you wish to evaluate?


 

Capital Cost Based Incentives

Percentage-based incentive (%) Maximum incentive ($) Rebate ($/kW) Maximum rebate ($)

Unlimited

Unlimited

Production Based Incentives

Production incentive ($/kWh) Incentive duration (yrs) Maximum incentive ($) System size limit (kW)
Show more inputs
Reset to default values
Show more inputs
Reset to default values

Capital Cost Based Incentives

Percentage-based incentive (%) Maximum incentive ($) Rebate ($/kW) Maximum rebate ($)

Unlimited

Unlimited

Production Based Incentives

Production incentive ($/kWh) Incentive duration (yrs) Maximum incentive ($) System size limit (kW)
Show more inputs
Reset to default values
Reset to default values
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