Solar Basics

Photo Credit: Earthwell Energy Management

Solar is rapidly advancing nationally, and this Solar Over Louisville campaign will illustrate how you can harvest your own electric power from the sun’s rays that freely fall onto your property every day.  This page will teach you the basics on how you can use the energy you captured to power your life.

We want you to experience the thrill of what can become one of the most rewarding investments of your life.

Solar Today

Solar is undergoing widespread and rapid growth in the United States.

Did you know:

  • The amount of solar photovoltaics installed in the U. S. grew by nearly 500% from 2010 to 2013, to over 20 GW today (GTM Research/SEIA).

  • The price of solar dropped by 53% since 2010 (ASES).

  • In 2015, the United States has more than 600,000 solar installations that power more than 4 million homes (ASES).  More…

How Solar Energy Works?

Solar energy systems enable homeowners or businesses to take advantage of the abundant energy source that sunlight provides.

While solar is comprised of several different technologies, there are three main types: photovoltaics (PV) for electricity; solar heating & cooling (SHC) for thermal transfer; and concentrating solar power (CSP).  More…

Benefits of Solar

Solar energy is a clean and renewable energy source.​  It saves money (often from day one), creates local jobs, reduces greenhouse gas emissions, protects health and the environment, expands energy independence and security, enhances economic competitiveness and prosperity, and safeguards future generations.  More…

Net Metering

Net metering is an important part of the residential solar piece.  As a customer of LG&E-KU you can benefit by receiving credit for the solar power you produce, using the energy being produced by your system while the sun is shining, and store excess energy produced on the grid.  More…

Types of Solar

There are various types of solar: Passive, Daylighting, Solar Water Heating, Solar Thermal, Solar Photovoltaics, Solar Car Charging / Solar Buses, and Concentrating Solar Energy.  More…

Energy Efficiency Basics

Energy efficiency measures allow for the heating, cooling, lighting and powering of homes using less energy.

Insulating and closing up your building’s envelope will keep you comfortable while allowing you to use less energy.  The upfront cost of energy efficient measures pay you back over time with reduced energy costs.  There are many ways to maximize energy efficiency on your property.  The more energy efficient your property is before going solar, the smaller the solar system you will have to invest in to cover your comfort and needs.  More…


Solar Equipment and Industry term definitions and Acronyms.

When first educating yourself about solar energy and the industry, it will be necessary to become familiar with various terms related to energy, utility management, sustainabile building development, and organizations.  A primary goal of Solar Over Louisville is to build an informed citizenry and to educate consumers.

Watt / KilowattA watt is a unit of power; a kilowatt is 1000 watts (kW).

Energy Conservation:  Saving energy through actions that reduce the use of energy, such as reducing the number of hours a home is heated, or turning on fewer lights.  Doesn’t mean a change in how much energy is consumed for the desired service, but rather doing behavior changes that reduce the use of the service.

Energy Efficiency:  Energy efficiency means using less energy to get the same service.  For example, an LED lightbulb will produce as much light as an incandescent using only one-fith the amount of electricity.  Improving the efficiency of a home can reduce its electric consumption, which reduces the size needed for a renewable system to power it.  Efficiency may refer to efficient energy use, or efforts made to reduce energy consumption, (should not be confused with energy conservation, although this occurs).

Renewable Energy:  Generally is defined as energy that comes from resources which are naturally replenished on a human timescale such as sunlight, wind, rain, tides, and waves.  Can be used to replace fossil fuel energy for electricity generation and heating hot water.

Watt:  A watt is a unit of power; e.g., 1 watt equals 1 volt x 1 ampere of current.  A kilowatt is 1000 watts (kW).  More…

Acronyms & Abbreviations

KySES: Kentucky Solar Energy Society

REEPS: Renewable Energy and Efficiency Portfolio Standard  More…