Technology Assessment Division

Solar Energy

Solar Notes

Solar Overview
A quick overview of solar electric and solar water heating systems addressing the key issues that determine a successful installation

Solar Water Heaters
A cost effective way to heat water in Louisiana

State Incentives

Solar Energy Systems Tax Credit

Louisiana Department of Revenue provides a 50% refundable tax credit for the purchase of solar electric and solar water heating systems installed at a Louisiana Residence before January 1, 2018.  The credit can be applied to the first $25,000 of the cost of purchase of the system. 

For leased systems, the credit is equal to 50% of the first $25,000 for a system installed before January 1, 2014.  For a system installed on or after January 1, 2014, the credit is equal to 38% of the first $25,000.  The purchase and installation of a leased system shall be eligible for a tax credit under the following circumstances:

  1. For a system purchased and installed on or after July 1, 2013, and before July 1, 2014, the system shall cost no more than $4.50 per watt and provide no more than six kilowatts of energy.
  2. For a system purchased and installed on or after July 1, 2014, and before July 1, 2015, the system shall cost no more than $3.50 per watt and provide no more than six kilowatts of energy.
  3. For a system purchased and installed on or after July 1, 2015, and before July 1, 2018, the system shall cost no more than $2.00 per watt and provide no more than six kilowatts of energy.

This tax credit may be combined with any federal tax incentive, but cannot be combined with any other state tax incentive.

Louisiana Revised Statute 47:6030. Solar Energy Systems Tax Credit
The current statute pertaining to the Solar Energy Systems Tax Credit

Act 428 of the 2013 Regular Legislative Session
Eliminated the tax credit for wind energy systems, established different criteria and credit amounts for leased systems, and sunsetted the authority for the granting of credits on December 31, 2017

Act 371 of the 2007 Regular Legislative Session
Created the Wind or solar energy systems tax credit

Tax Exemption for Solar Energy Systems

Louisiana Revised Statute 47.1706. Ad Valorem Tax Exemption for Solar Energy Systems
Louisiana provides an Ad Valorem tax ecemption for solar electric and solar water heating systems installed on residential property.

Federal Incentives

Residential Energy Efficient Property Credit
The federal government offers a 30% tax credit for the purchase and installation of a renewable energy system that serves a dwelling unit located i nthe United States that is owned and used as a  residence by the taxpayer.

Program Overview
An overview of the Residential Energy Efficient Property Credit by DSIRE™

Sizing and Location

PVWatts
A Performance Calculator for Grid Connected PV Systems:  Researchers at the National Renewable Energy Laboratory developed PVWatts to permit non-experts to quickly obtain performance estimates for grid-connected photovoltaic systems.

Grid Tied PV Sizing Calculator (for systems with no batteries)(xls)
Stand Alone PV Sizing Example (for systems with no batteries)(PDF)

Photovoltaic Demonstration Projects

Photovoltaic Demonstration
Demonstrating photovoltaic power in areas where conventional electric power may not be possible or may be cost prohibitive

Portable Photovoltaic System (PDF)
An educational tool to show a working photovoltaic system

Video of the Portable Photovoltaics systems being used to power TV at the Greater Baton Rouge State Fair

 Photovoltaic Roofing Shingles Project
A project that demonstrates photovoltaic roofing shingles in South Louisiana.  Grant by the LA DNR technology Assessment Division to the Mechanical Engineering Department of Tulane University