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Tools

Energy & Electricity Glossary

All the words you might come across on your path to a cheaper electricity bill.

Author:

Headshot of Thad Warren

Editor:

Updated:

08/28/2026

Energy shopping should be simple. That's why we've put all the complicated jargon you might run into along the way to the cheapest plan in one place for easy reference.

A

Active power - electricity that is actually being used in real time, to power lights, appliances, and other devices that are turned on

Aggregator - a company or broker that acts on behalf of a group of customers to negotiate, buy, and manage energy plans

ASMR Meter - Advanced Meter System Remote, a meter that can be turned on remotely typically with no additional fees

AMSM Meter - Advanced Meter System Manual, requires a technician to power on and additional fees may apply

Average price per kWh - the average amount you pay for each kilowatt-hour (kWh) of electricity you use

B

Base charge - a flat monthly fee, included in some energy plans, charged regardless of how much electricity you use

Bill copy - a copy of your previous electricity bill. Required for some new enrollments without late fees or balance forward

Bill credit - a credit applied to your electricity bill when you meet certain energy usage requirements, typically calculated into the expected rate

Billing cycle - period of time included in an electricity bill, usually about 30 days

Biomass - energy generated by burning organic matter, such as wood, food, and waste. Landfill gas is the most widely used resource for biomass energy generation.

British thermal unit (Btu) - a universal unit used to measure heat energy. One Btu is the amount of energy needed to warm one pound of water by 1˚F.

Buyback programs - programs that pay or credit customers for extra electricity they produce from solar panels and send back to the power grid

C

Carbon calculator - a tool that estimates how much carbon pollution a person, home, business, or activity creates

Carbon emissions - carbon gases released into the air, usually from burning fuels like coal, oil, and natural gas to produce electricity

Carbon footprint - the total amount of carbon pollution created by a person, product, or business

Carbon dioxide - a gas released naturally and by activities like burning coal, oil, and natural gas. Too much carbon dioxide in the atmosphere contributes to global warming and air pollution.

Competitive supplier - an energy company that competes with other energy providers to sell electricity or natural gas to customers in deregulated areas

Connection fee - a fee charged to start electricity service or connect to the power grid

Contract length - the amount of time you agree to stay on an electricity plan, typically between 3 months and 3 years for residential contracts

Credit freeze - a security freeze on customer's credit file that prevents a supplier from running a credit check until lifted

D

Default rate - the electricity rate that you’re automatically enrolled in if you do not shop for a new plan or supplier, these rates are typically set by your state’s utility commission

Demand - the amount of electricity required to power all consumers needs at a specific time

Deposit - money an electricity may require upfront before starting your service, typically refundable but subject to your electricity company’s policies and your contract

Disconnection fee - a fee charged to shut off electricity service to a location

Disconnection risk - when an electricity account is overdue, risking service disconnection by the utility 

Distributed energy - electricity produced close to where it is used instead of at a large, distant power plant

Distribution (or, delivery charge) - a charge for delivering electricity from the power grid to your home or business location

Dropbox - secure document platform used for contracts, MVO forms, and bill copies when e-sign is not available

Drop notice - formal notification that a customer's account is being dropped from supplier service, typically due to a non-payment, unauthorized switch, or closure, requiring immediate action or else risk of losing power

E

Early termination fee (ETF) - a fee you have to pay if you cancel a fixed-rate electricity contract before it ends If you are moving to a new location you are not required to pay out any early termination fees.

Electric choice - the ability to choose your electricity company in areas with energy competition

Electric cooperative - a member-owned electric company that provides electricity to a local area, ex. Austin Energy

Electric Reliability Council of Texas (ERCOT)  - the organization that manages most of Texas’s power grid and helps balance electricity supply and demand

Electricity Facts Label (EFL) - PUCT mandated disclosure document required for all Texas electricity plans that details all important information about an electricity plan, including prices, fees, contract terms, and where the electricity comes from

EnergyBot - an online marketplace that helps residents and businesses compare electricity plans and save on energy based on their real energy usage data

Energy audit - a review of how a home or building uses energy to find ways to reduce consumption and save money

Energy charge - the amount you pay for the electricity you use, based on the number of kilowatt-hours (kWh) used

Energy deregulation - a system that allows customers to choose between competing energy companies instead of having one default provider, designed to encourage better rates, service, and benefits

Energy efficiency - using less energy to do the same job, for example, using an LED bulb instead of an older incandescent lightbulb

Enrollment rejection - notification that an enrollment attempt was rejected, typically due to credit failure, late payments, or other circumstances 

Environmental disclosure label - a document that explains where an electricity plan’s energy comes from and its environmental impact, including what percentage of your energy plan in renewable

ESID (Electric Service Identifier) - a unique number used to identify an electricity service meter location in Texas

Ethanol - a fuel made from plants, usually corn or sugarcane, mixed with gasoline

F

Fixed rate - an electricity rate that stays the same during your contract period, even if wholesale energy market prices fluctuate

Free nights and weekends - an electricity plan structure that charges little to nothing for electricity used during certain nighttime or weekend hours, typically causing the “peak” hours to cost much more

G

Generation mix - the different energy sources used to produce electricity, such as natural gas, wind, solar, coal, and nuclear power

Geothermal energy - energy that uses heat from inside the Earth to produce electricity or heat buildings

Green energy - energy that comes from sources with a lower environmental impact, such as wind and solar power

Global warming - the long-term rise in Earth’s average temperature, mainly caused by greenhouse gases

Grid - the large network of interconnected power plants, wires, and equipment that transports electricity to homes and businesses

H

HVAC - short for heating, ventilation, and air conditioning. An HVAC system is responsible for heating, cooling, and moving air around buildings

I, J

Investor-owned utility - a utility company owned by investors that provides electricity or natural gas to customers

K

Kilowatt (kW) - a unit that measures the electrical power being used or produced at a specific moment, 1 kilowatt is equivalent to 1000 watts

Kilowatt hour (kWh) - a unit that measures how much electricity you use over time, electricity bills typically charge based on the number of kWh you use in a month

L

Load forecast - a prediction of how much electricity customers will need at a specific time

M

Meter - a device that measures how much electricity or natural gas a home or business uses

Month to month plans - electricity plans with no long-term contract that continue one month at a time and have variable rates associated with them

Minimum usage fee - a fee added to your electricity bill if you don’t use the minimum amount of electricity required by your plan in a certain billing cycle  

Meter add - adding a new service location (meter/ESID) to an existing account Minimum usage fee

Municipally owned utility - also known as city-owned, an electric utility that is owned and operated by a city or local government

N

Natural gas - a fuel found underground that is used for heating, cooking, and generating electricity

Net metering - a billing system that gives customers credit for extra electricity their solar panels or other energy systems send back to the grid

Nuclear energy - energy produced by splitting atoms in a nuclear power plant to create heat and generate electricity

O

Off-peak - times when electricity demand is lower, such as overnight. Electricity may cost less during these hours on some plans, like “Free Nights and Weekends”  

On-peak - times when electricity demand is high, electricity may cost more during these hours on some plans

P

Permit issue - some locations (especially for business) require a government permit before power can be connected or switched. The utility will reject the enrollment until the permit is obtained. 

Personal guarantee - alternative to a cash deposit for credit failures where customer personally guarantees payment obligation. Not accepted by all suppliers. 

Power to Choose - Texas’s official electricity shopping website, where customers in deregulated areas can compare retail electricity plans

Pre-Approved plan - credit-friendly plan offered when a customer fails standard credit with different rate structures to offset risk 

Prepaid plan - an electricity plan where you pay for electricity before you use it instead of receiving a bill afterward.  

Pro Tip: If you use more than the prepaid amount of electricity, you will receive a “top up” bill at the end of the month to make sure you have paid off all charges.

Price to Compare (PTC) - a utility’s electricity supply price that customers can use as a starting point for comparison when reviewing offers from other retail electricity providers. Each state has a different PTC and some states, like Texas, don’t have a PTC at all

Provider Of Last Resort (POLR) - a backup electricity provider that may serve a Texas customer if their current provider can no longer provide service

Public Utilities Commission of Texas (PUCT) - the Texas government agency that oversees the state’s electricity, water, and telecommunications utilities

Q, R

Real rate - the actual, average price you pay for electricity after including the charges and fees, as well as any bill credits or special pricing, that apply to your usage

Real-time pricing - an electricity plan where the price can change throughout the day based on current wholesale electricity market prices

Renewable energy - energy from sources that naturally replenish themselves, such as sunlight, wind, and moving water

Renewable Energy Certificate (REC) - a certificate that represents the environmental benefits of one megawatt-hour of electricity produced from a renewable energy source

Retail Electric Provider (REP) - a company that sells electricity plans and bills customers in a deregulated electricity market

Right of Rescission - federally mandated right to cancel a new electricity contract without penalty within 3 federal business days of signing. Key rules include: (1) window begins the day after signing, (2) Saturdays are considered business days, (3) federal holidays do not count

S

Small commercial - small commercial customers (typically under 50 kW demand or below a usage threshold set by the supplier) have PUCT protections including the 3-Day Right of Rescission and EFL requirements 

Smart meter - a digital meter that automatically measures and sends information about your electricity usage

Solar lease - an agreement where you pay to use solar panels owned by another company instead of buying the panels yourself

Solar power - energy from sunlight that can be turned into electricity using solar panels

Solar Power Purchase Agreement (SPPA) - an agreement where a company installs and owns solar panels on your property and you pay for the electricity they produce

Supply charge - the part of an electricity bill that pays for the electricity itself, rather than the cost of delivering it

Switch hold - utility (TDSP) flag preventing any REP from switching an account, commonly due to: (1) customers have a payment plan with a REP for past-due amount, or (2) meter tampering detected by TDU. Must be resolved before new enrollments can proceed. 

T

Terms of Service (ToS) - a document that explains the rules, fees, and other details of your electricity service agreement

Tidal power - renewable energy that uses the movement of ocean tides to generate electricity

Time of Use (TOU) rate - an electricity rate where the price changes depending on the time of day or day of the week

TDU charges - regulated fees in Texas that pay for delivering electricity and maintaining local poles, wires, and other equipment

Transformer - a piece of electrical equipment that changes electricity to a higher or lower voltage so it can be safely moved and used

Transfer of Service (TOS) - existing customer moves to a new address and wants to continue service at a new location

Transmission and Distribution Service Provider (TDSP) - a company that maintains the power lines and delivers electricity to homes and businesses in parts of Texas, also commonly called a TDU

U

Usage - the amount of electricity you use during a certain period of time, measured in kilowatt-hours (kWh)

Usage data - historical electricity consumption data for a specific meter pulled from the utility provider 

Utility - a company or organization that provides services such as electricity or natural gas and maintains the equipment used to deliver them

V

Variable rate - an electricity rate that changes from month to month based on your provider’s terms or market conditions

Volt - a unit used to measure the electrical force that pushes electricity through a wire Wind power - renewable energy that uses wind turbines to turn the wind’s movement into electricity

W, X, Y, & Z

YRAC disclosure - short for “Your Rights as a Customer,” a document that explains an electricity customer’s rights and protections in Texas