Glossary of Terms
Sectors
Accreditation
The official recognition that a project or entity meets specific standards. In environmental markets, accreditation ensures that carbon, biodiversity, or other credits deliver the promised outcomes. For instance, the Verified Carbon Standard by Verra is a leading greenhouse gas accreditation program.
Active Power
Measured in watts (as kW or MW), this is the rate at which electrical energy is produced, transmitted and used.
ADC
Average daily consumption (m3)
ADC (Average Daily Consumption)
The average amount of energy your home or business uses on a daily basis, measured in kWh.
Agreed Capacity
This is the agreed amount of electricity supply or load that’s sent to a premises. It’s an essential consideration for larger enterprises.
Agreed Capacity (kVA)
The maximum level of electrical demand a site is permitted to draw from the grid at any one time, as agreed with the network operator.
Agroforestry
The integration of trees into agricultural land, combining agriculture and forestry practices. This includes: Silvoarable systems: Combining crops and trees. Silvopastoral systems: Combining livestock and trees.
AMR (Automated Meter Reading)
This is where electricity and gas meter readings are taken automatically, and sent across to your provider. There’s often a charge associated with this.
Annual Bill
The amount a customer pays on gas, electricity, water over a full year.
Annual Contract
A year-long contract with your energy supplier.
Annual Quantity (AQ or AAQ)
Is the annual amount of gas you used measured in kilowatt-hours (kWh).
APR (Annual Percentage Rate)
A yearly rate added on to any loans you’ve taken out, or investments you’ve made. This can appear on your energy bills.
Artificial Wetland
Man-made wetlands constructed for purposes like land reclamation or to mitigate the loss of natural wetland areas.
ASHP (Air Source Heat Pump)
An air source heat pump absorbs outdoor heat from the air, and distributes this indoors. It’s often touted as a good solution for more rural areas, and for those looking to heat their premises cheaply.
Assessed Charges
When a company fines a charging value inappropriate.
Auto-rollover
Automatic contract rollover- a supplier has the ability to extend the duration of an existing term tariff or apply a new fixed term tariff without the consumers say.
AV
Addressing affordability and vulnerability of clients/customers.
Back Billing
Bills sent to your premises when you’ve not been properly charged for the energy you consumed.
Balance
How much you owe to the energy company.
Barrier To Entry
A cost or reason that may prevent a business from entering the market.
Base Load
The minimum expected level of demand across the electricity grid over a set amount of time (such as weekly, monthly, biannually, or annually).
Base Rate
The Base Rate, also known as the Bank of England’s Base Rate, is the 5.25% interest added to any purchase, loan or contract.
Baseline
A measurement of the ecosystem services (e.g., biodiversity) provided by an area before implementing a nature recovery project or new management practices. Baselines are used to measure improvements over time and to demonstrate additionality for generating units for sale.
Behind-the-Meter (BTM)
Energy that is generated and used on-site, such as from solar panels and battery storage, without being sent through the main electricity grid.
BEIS
The Department for Business, Energy and Industrial Strategy. It was split down in 2023 into several other departments, including the Department for Energy Security and Net Zero (DESNZ).
Bill Validation
The process of reviewing and checking utility invoices to ensure they are accurate, correctly calculated, and in line with agreed tariffs and contract terms.
Billing Period
A period of time that’s used to calculate how much you need to pay.
Biodiversity Credits
Tradable units representing measurable positive outcomes for biodiversity, such as habitat restoration or species protection. These credits enable entities to compensate for biodiversity impacts elsewhere, supporting conservation efforts.
Biodiversity Metric
An evidence-based tool to assess the biodiversity value of a site or habitat. It considers factors like habitat size, distinctiveness, condition, and connectivity. For example, Defra’s Biodiversity Metric is used for Biodiversity Net Gain assessments in England.
Biodiversity Net Gain (BNG)
A policy approach requiring developers to ensure that any biodiversity loss resulting from development is offset by an overall gain, typically quantified as a minimum 10% increase in biodiversity value. In England, this became mandatory for most developments in 2024, allowing developers to purchase biodiversity credits if on-site compensation isn’t feasible
Biodiversity Offset
Compensation for biodiversity loss due to development by restoring, enhancing, or creating habitats elsewhere to achieve no net loss or a net gain in biodiversity.
Biodiversity Unit (BU)
A quantifiable measure of biodiversity, calculated using metrics that consider habitat type, condition, and area. Biodiversity Units are used to assess losses and gains in biodiversity, particularly in the context of Biodiversity Net Gain policies.
Biogas
Biogas is a renewable energy made up of a mixture of methane, carbon dioxide and hydrogen sulphide.
BioResources
BioResources refers to the wastewater sludge transport, disposal, and recycling.
BREEAM
The world’s leading sustainability assessment method for buildings and infrastructure, used to measure and certify the environmental performance, design, construction, and operation of built assets.
Building-Integrated Photovoltaics (BIPV)
Solar technology integrated directly into building materials, such as roof tiles, façades, or windows, allowing structures to generate electricity without the need for separate mounted solar panels.
Capacity
The amount of natural gas that can be produced in a period under network design conditions.
Capped Pricing
An electricity or gas tariff that guarantees the price per kWh will not increase above a certain price for a fixed period.
Capped Tariffs
The cost of energy per unit is capped at a specified level and cannot rise above that price.
Carbon Bank
A carbon bank is a repository or trading platform for carbon credits, units representing a tonne of CO₂ (or equivalent) either reduced or removed from the atmosphere.These credits are generated through activities like reforestation, peatland restoration, or renewable energy projects and can be purchased by companies to meet net zero targets.Supports voluntary and compliance carbon […]
Carbon Credits
A certificate which allows a country or business to produce a certain amount of carbon emissions and which can be traded if the full allowance is not used.
Carbon Debt
The amount of carbon emissions that exceed sustainable carbon sinks. A carbon debt could be assigned to any entity to which carbon emissions can be attributed, such as an individual, a firm, a group, a country, or an industry. Attribution of emissions and estimation of sustainable carbon sinks are complications to calculating this metric.
Carbon Neutral
The state of making no net release of carbon dioxide to the atmosphere, achieved through offsetting emissions, typically by planting trees.
Carbon Offsetting
The process of compensating for carbon dioxide emissions arising from human activity, by removing the equivalent amount of carbon dioxide from the atmosphere, typically through carbon credits or offsetting projects.
Carbon Price
The value applied to each unit or carbon emissions.
Carbon Tax
An approach to limiting emissions of carbon dioxide, a major contributor to human-induced climate change, by establishing a tax on goods and services that is commensurate with the amount of CO2 released in their creation and delivery.
CBAM (Carbon Border Adjustment Mechanism)
An EU carbon pricing mechanism that applies carbon-related charges to certain imported goods, designed to prevent “carbon leakage” and create a level playing field between domestic and overseas producers. It is becoming an important consideration for businesses involved in international trade, particularly those importing or exporting carbon-intensive products.
CCS
Carbon Capture & Storage. This involves capturing the carbon emission produced through industrial and manufacturing processes, and storing it in special containers underground. It’s often viewed as an innovation in carbon offsetting, and a good step forward towards carbon neutrality.
CfD
Contracts For Difference. A government initiative designed to provide significant levels of support and funding to renewable energy generation.
Climate Change Levy (CCL)
A government tax aimed at reducing gas emissions and encouraging greater energy efficiency across businesses or non-domestic organisations.
Climate Change Levy (CCL) Exemption
A relief that reduces or removes the Climate Change Levy charge for qualifying businesses, typically those using energy for eligible energy-intensive or environmentally beneficial processes.
Commodity Charge
The common name given to the costs associated with the generation and distribution of the electricity and gas you use.
Conservation Banking
A market-based conservation tool involving the preservation, enhancement, or restoration of habitats to offset impacts to similar habitats elsewhere. Conservation banks sell credits to developers who need to compensate for environmental impacts, promoting habitat conservation.
Consumption
Total energy units used within a specific period, measured in kilowatt-hours (kWh).
Contract End Date
The date your current energy tariff contract ends, and the date by which you’ll need to have arranged your next contract in order to avoid costly deemed rates.
Cooling Off Period
The time you’re given after choosing an energy provider to cancel your contract with no penalty. These are common in domestic contracts, but less so in business energy.
CSRD (Corporate Sustainability Reporting Directive)
A major EU sustainability reporting framework that sets out how large businesses must measure, disclose, and report their environmental and social impact, with increasing alignment influencing UK corporate reporting standards and ESG compliance expectations.
CV
Charging value of a product or service.
DECC
The Department of Energy and Climate Change. Formerly its own branch of government, it was absorbed by the Department for Business, Energy and Industrial Strategy in 2016.
Deemed Rate Contract
This is the contract you’ll be placed on if you move into a new premises without first agreeing a contract with a provider, and proceed to use any energy. These are often much more expensive than an agreed-upon contract.
Deemed Rates
Higher default energy prices charged when a business has not agreed a formal supply contract with an energy supplier.
Department for Business, Energy & Industrial Strategy (BEIS)
The Department for Business, Energy & Industrial Strategy (BEIS) replaced the Department of Energy and Climate Change (DECC) in 2016.
DESNZ
The Department for Energy Security and Net Zero. This split from the Department for Business, Energy and Industrial Strategy in 2023, and seeks to better illuminate the future of renewable energy.
Discharge Points
The point trade effluent service is provided to premises.
Distribution Network
Delivers lower voltage electricity to homes, businesses and industries across the UK.
DNO
Distribution Network Operator, a company that’s licensed to distribute electricity.
Dual Fuel bill (DF)
An energy contract where customers use the same supplier for both gas and electricity.
DUos
The Distribution Use of System. A charge applied to cover the cost of receiving your power from the regional distributor. Closely relates to TNUoS (Transmission Network Use of System).
DUoS (Distribution Use of System)
Charges applied by local Distribution Network Operators (DNOs) for using the regional electricity network infrastructure, the local “wires” that deliver power to a business premises or building.
Ecosystem Service Credits
Market-based instruments quantifying and valuing the benefits provided by ecosystems, such as clean water, air, and carbon sequestration. These credits incentivise conservation and sustainable land management by allowing stakeholders to invest in ecosystem services.
Ecosystem Services
The benefits humans derive from ecosystems, categorised into provisioning (e.g., food, water), regulating (e.g., climate regulation), supporting (e.g., nutrient cycling), and cultural (e.g., recreational) services.
Electrical Installation Certificate (EIC)
A safety certificate issued by an electrician after new electrical work is carried out, ensuring it conforms to the UK national standard BS 7671.
Electricity Bill
The monthly or annual bill you’ll receive for the electricity you’ve used.
Energy Efficiency
The practice of using less energy to provide the same amount of useful output.
Energy Ombudsman
A independent party used to resolve disputes between a supplier and consumer. Free to use and its decisions are binding.
Energy Storage Systems (ESS/BESS)
Battery storage systems that store electricity for later use, helping businesses manage energy demand and reduce costs by avoiding peak-time grid charges.
Energy Supplier
The company that provides your electricity, gas or water. For instance, British Gas (owned by Centrica plc.) are one of the more popular energy suppliers UK-wide.
Environmental Impact Bonds (EIBs)
Financial instruments that fund environmental projects with measurable outcomes. Investors provide upfront capital for initiatives like wetland restoration, and returns are linked to the project’s success in achieving environmental targets.
Estimated Annual Consumption (EAC)
A supplier’s forecast of a customer’s annual energy usage, used for billing estimates when actual meter readings are not available, which can sometimes lead to inaccurate charges.
Estimated Annual Consumption (EAC)
The estimated annual consumption is a measurement in kWh of the estimated usage for the upcoming year.
Estimated Meter Reading
Estimation of your average energy usage to calculate your bill.
Estimated Rate/Rate
This is your energy supplier’s best estimate at your current meter reading. It can mean that your actual bill increases or decreases when an accurate meter reading is received.
Evergreen contract
An energy tariff that is contracted for an indefinite length and does not contain a fixed term period.
Fittings Regulations
The water fixture regulations act 1999.
Fixed Term Contract
A contract that lasts for a specified length of time. This is usually annual, but businesses can have contracts that last up to 5 years.
Fixed-rate tariffs
Can guarantee the price of energy for a fixed time period e.g. 12 months, offering a fixed price for each unit of power.
FMD
Fuel Mix Disclosure. A requirement for all electricity suppliers to disclose openly where they source their electricity from.
Fossil Fuel Power
Electricity generated by coal, oil, and natural gas.
Fossil Fuels
Fuels such as oil, gas and coal which are formed in the earth from plant and animal remains. Typically burnt to release the energy which also produced greenhouse gas emissions.
Fuel Poverty
The term applied to any household or business that uses 10% or more of their annual income to cover energy bills.
Gas Bill
The bill you’ll receive from your gas supplier. Usually issued on a monthly or annual basis, but certain contracts may use a different timescale.
Gas Distribution Networks (GDN)
There are four Gas Distribution Network companies which cover different geographical regions across the UK.
Gas Substation
A small facility located on-site that reduces that stabilises pressurised gas for use in domestic or business properties.
Giggawatt (GW)
A gigawatt is equivalent to 1 billion watts. This would power more then 10 million light bulbs.
Green Gas Support Scheme (GGSS)
The Green Gas Support Scheme is a government scheme that provides financial aid or incentives for new biomethane plants to increase green gas in the gas grid. This scheme is open to applicants within England, Scotland, and Wales.
Green Tariff
Tariffs that use green or carbon offset energy to power homes and businesses.
Greenhouse Gas (GHGs)
Greenhouse gasses are in the earth’s atmosphere that trap heat.
Greenwashing
The practice of making misleading or exaggerated environmental claims to appear more sustainable than a business or product truly is. Addressing and avoiding greenwashing is increasingly important for building trust, maintaining credibility, and meeting growing consumer and regulatory expectations around transparency.
Grid Supply Point (GSP)
The point in which the energy supply is taken from the National Grid transmission systems into a local distribution system.
Habitat Bank
A habitat bank is a system where landowners restore or create wildlife habitats to generate biodiversity units or credits that can be sold to developers needing to offset ecological impacts elsewhere.These banks offer a cost-effective, large-scale alternative to on-site compensation and are often regulated under Biodiversity Net Gain (BNG) frameworks.Promotes long-term habitat conservationUsed in planning […]
Heat Rate
The rate at which energy is produced at power plants. More technically, it’s the amount of input (or heat) needed to produce one unit of output.
HH Meters
Half Hourly Meters. These send reliable data across to the energy provider on a half-hourly basis through AMR, ensuring accurate monthly bills.
HHD
Half Hourly Data. The data and information that HH Meters send across to the energy supplier.
High User
A particularly large consumer of energy. Ofgem states that this is a user who expends more than 5,100 kWh of electricity, and/or 23,000 kWh of gas.
Hydroelectricity
This is any electricity generated through hydropower. These are usually dams or underwater turbines that turn the flow of water into energy.
Hydrogen Ready
Boilers or energy infrastructure designed to operate on natural gas initially, but capable of being converted to use hydrogen in the future.
IDNO
Independent Distribution Network Operator, also licensed to distribute electricity but often on a smaller, local level within a larger DNO.
IGT
Independent Gas Transporter. A gas transportation network that operates outside of the main regional gas distribution networks, and can provide power outside of the main grid.
Indirect Costs
Costs that aren’t a direct result of the energy you consume. This includes your supplier’s operating costs like the CCL and VAT.
Interconnectors
Large cables that transport electricity across country borders and longer distances.
IPPC
Integrated Pollution Prevention & Control. A scheme designed to help manage and mitigate the pollution from industrial-sized businesses.
Kilowatt (kW)
Unit of electric power, equal to 1000 Watts.
Kilowatt-hours (kWh)
Unit of measurement for energy consumption.
KVA (Available Capacity)
The maximum electrical capacity reserved for a site by the network operator. Businesses are often charged for this agreed capacity even if they do not fully use it, making it important to understand whether their capacity allowance is appropriately sized for their actual energy demand.
Large Business
Defined as a business with more than 100 staff, and that uses between 25,000 and 50,000 kWh per year.
Large Energy Suppliers
Also known as The Big Six. This is the collective name given to the 6 largest energy providers in the UK – British Gas, EDF Energy, E.ON, npower, Scottish Power and SEFE.
LCBP
The Low Carbon Building Programme. A former government initiative designed to better promote renewable and forward-thinking energy solutions. It ended in 2010, to be replaced by the RHI in 2011.
LNG
Liquefied Natural Gas. Natural gas that has been cooled to a liquid state so that it can be transported more easily and safely.
LOA
Letter of Authority- A legal document that allows a third party to deal with suppliers on your behalf.
Load Management
Load management is the controlling of energy and electrical consumption, specifically to ensure fiscal security.
Losses
Any lost electricity or gas during the transmission stage.
Low User
A customer that uses a much lower amount of electricity. Ofgem defines this as a company that uses less than 2,100 kWh of electricity, and/or 11,000 kWh of gas.
Loyalty Discount
A discount or additional incentive applied to an energy deal for opting to remain with a company for an extended period of time.
M3
If your business is on a meter, then your water will be measured in cubic metres. A cubic metre is equivalent to 1000 litres of water.
Market Share
The amount of customers, or the share of the market, an energy company has. Larger companies will have a greater share of the market, for example.
Medium Sized Business
Defined as a business that has between 50 and 100 employees, and that uses in the range of 15,000 and 25,000 kWh per year.
Megawatt hour (MWh)
A unit of measurement of electricity used in one particular area. A megawatt hour is equal to 1000 kWh of electricity.
Meter
A device measuring the quantity of water used on a business premise.
Meter Point Reference (MPR)
Is the unique reference number for all gas meters in the UK.
Meter Readings
Used to measure your energy consumption and calculate a bill.
Microbusiness
Defined as a business that has less than 9 employees, and uses less than 5,000 kWh per year.
Million-cubit meters (MCM)
A unit used to measure energy, 1 MCM is approximately 360,000 therms.
MOP
Meter Operator. The company that’s responsible for installing and maintaining your meter, as well as any necessary adjustments or readings.
MPAN
Also known as a supply number, a meter point administration number is a 13-digit code unique to every electric meter.
National Balancing Point (NBP)
Is the point where wholesale gas is traded within the UK.
National Grid
The infrastructure that transports all electricity and gas across the UK. The national grid feeds into the distribution networks.
National Transmission System (NTS)
It is the National Grid’s high-pressure gas network that supplies gas to end consumers, including large end users such as industrial consumers and power stations, who receive gas directly from the NTS.
Natural Capital
The world’s stocks of natural assets, including geology, soil, air, water, and all living organisms, that provide ecosystem services essential for human survival and economic activity.
Nature-Based Solutions (NbS)
Strategies that leverage natural processes to address environmental challenges, including climate change mitigation, flood control, and biodiversity enhancement. Examples include reforestation, wetland restoration, and sustainable agriculture practices.
Nature-Positive
An approach that goes beyond minimising environmental harm to actively restoring and regenerating natural ecosystems, aiming for a net positive impact on nature.
Net-Zero
A target of completely negating the amount of greenhouse gases produced by human activity to net-zero levels. Achieved by reducing emissions and increasing absorbing carbon dioxide from the atmosphere.
Network Costs
The costs needed to maintain, repair and run the energy network. Suppliers are charged this, which they then collect from their customers.
Network Operators
These are the companies responsible for maintaining and repairing the pipes and cabling that directs energy to our homes and businesses.
NHH Data
Non-Half Hourly Data. This is data that’s not sent to the energy provider on a half-hour basis, and is instead reported on a daily, weekly or monthly basis.
No Net Loss
An environmental policy goal aiming to balance biodiversity losses with equivalent gains, ensuring that development activities do not result in a net decrease in biodiversity. This is often achieved through the mitigation hierarchy: avoid, minimise, restore, and offset.
Non Time of Use Tariff (non-ToU)
A tariff that is not a time of use tariff.
Non-Commodity Costs
Charges on an energy bill that relate to the delivery and operation of the electricity network rather than the energy itself, such as TNUoS and DUoS charges. These costs are projected to account for around 60% of a typical business energy bill by 2026.
Non-portable Water
Non-portable water has not been treated to the required standard to enter the public distribution network.
Non-Renewable Energy
Energy that’s sourced from non-renewable or green sources, such as coal, oil and natural gas.
Nuclear Regulated Asset Base (RAB)
A funding model used to support the development of new nuclear projects, such as Sizewell C, where part of the project costs are recovered through charges added to consumer energy bills.
Off-Peak
Any times outside of the peak hours of energy usage. Off-peak times are usually after 9pm until 6am, with peak times being during normal business hours, and into the evening when most are at home.
Ofgem
The Office of Gas and Electricity Markets, a regulatory body for the electricity and gas markets in the UK, is responsible for protecting consumer rights and helping to establish a fairer and greener energy system.
Ofwat
Office of Water Services, is the body responsible for regulating the privatised water and sewerage industry in England and Wale.
Online Account Management
The online functionality of any electricity and gas providers. Most providers will allow you to pay bills, check meter readings, and ask questions through an online portal.
OZEV
Office for Zero Emission Vehicles is a team working across the government to support the transition to zero emission vehicles (ZEVs).
P272
A regulatory change that required many larger electricity customers to move to Half-Hourly (HH) settlement, meaning their energy usage is measured and billed in 30-minute intervals.
Paperless Billing
This is where you’ll receive all of your energy bills online via an email or online portal, rather than through the post.
Peak Demand
This is when the National Grid experiences its greatest amount of demand. It’s usually between the hours of 6am and 9pm.
Pipelines
These are the transportation channels for gas and oil. They’re usually deep underground or on the seabed.
Pre-Payment Tariff
This is where you can pay in advance for the energy you use. It’s most common in domestic properties, where you can top up a prepayment meter at a shop or post office.
Pre-Payment Tariffs
A pay-as-you-go option for houses with a pre-payment meter, you pay for energy before you use it via a key, card, or token.
Principal Terms
These are the primary or main terms of the contract you’ll receive when you first sign up. They’re usually related to payment terms, any limitations, and legal information.
PV
Stands for photovoltaic. This means products (usually panels) that use solar energy to provide power.
Ratchet/Ratcheting
This means the gradual increase of prices, specific to the energy sector. It’s a regular occurrence, and may be a term as energy prices have gone up over the last few years.
Raw Water
Raw water is water that has not been passed through water treatment facilities.
Reactive Power (KVAR)
The difference between the electricity that is supplied and the electricity that is converted into power, which indicates electricity wastage.
Regulator
A person or organisation whose job it is to ensure the fair and stable running of the market. For example, Ofgem is the regulator of the gas and electricity markets.
Renewable Energy
Energy produced from sources that do not run out and are naturally replenished such as the sun, wind, and water.
Renewable Resources
Electricity generated by sustainable sources. For example, solar panels, wind, geothermal, biomass, wave, or tidal power.
RO
Renewables Obligation Scheme. This initiative was designed to improve uptake of renewable energies, and closed in 2017.
SBTi (Science Based Targets initiative)
A globally recognised framework that helps businesses set credible, science-based emissions reduction targets aligned with climate goals. It is widely regarded as the “gold standard” for organisations making verified Net-Zero and decarbonisation commitments.
SEG
Smart Export Guarantee. A government-supported initiative that’s designed to reward small-scale renewable energy generators by paying them for the electricity they produce and ship.
Serial Number
A unique identification number given to products and items. In energy, it’s also called an MPAN or MPRN.
Sewerage Licence
A holder of a sewerage licence is allowed entry into the wastewater and sludge service market.
SIC
Service Industry Code. A specific code that’s assigned to the industry or sector your business operates in. It can be part of any business energy contract application.
Small Business
Defined as a business that has between 10 and 50 employees, and that uses between 5,000 and 15,000 kWh per year.
Smart Meter
A meter that allows you to see your energy consumption in real-time and that communicates directly with your energy supplier.
Solar Panels
Solar (or photovoltaic) panels capture solar energy (from the Sun) to generate electricity. They’re one of the UK’s main sources of renewable energy, alongside wind turbines.
Standing Charge
A daily charge you incur even if you don’t use any energy.
Supplier
The company that provides your gas, electricity and/or water. For example, your gas supplier could be British Gas, and your electricity supplier could be Octopus Energy.
Supply Point ID (SPID)
A unique identifier for a water supply point, similar to an MPAN for electricity, used to identify and manage water meter connections.
Surcharge
An additional charge applied to your bill. This can apply to a variety of factors, from administration costs to standing charges.
Switching
The term given to swapping from one supplier to another. This is usually done towards or at the end of your contract.
Switching Costs
Any costs that are associated with the switching process. This could be exit costs (such as leaving a contract early), metering and equipment charges, or less quantifiable costs like time or effort.
Switching Window
The window at the end of your current contract (usually around a month) where you can switch to a new provider without penalty or termination fees being applied.
Tariff
A documented list of utility rates, and terms and conditions, that have been approved by the Government.
Termination Fees
The costs associated with terminating (or ending) your energy contract early. This is to prevent any constant or disruptive switching.
Therms
A unit of energy measurement. To calculate the equivalent value in kWh, multiply by 29.3071.
TNUoS (Transmission Network Use of System)
A transmission charge applied to electricity bills to cover the cost of using and maintaining the national grid network. Often viewed as the replacement for the former “Triad” charging system, businesses actively look for ways to reduce these regional transmission costs through energy management and demand reduction strategies.
ToU Tariff
A Time of Use tariff. This means you pay less for energy that you use at off-peak times.
Trade Effluent
Liquid waste produced by businesses or industrial processes that is not domestic sewage, often requiring special permits for discharge into the sewer system.
Trade Effluent
Trade effluent is untreated sewage from commercial properties.
Transformer
A component in a circuit that allows electricity to be transferred across. It’s an essential part of the National Grid, and diverting power from cables into homes and businesses.
Transmission Network
A network that carries high voltage electricity from power stations to where it’s needed in the country.
Transportation Charge
A hidden cost on your gas and electricity bills. It’s the cost associated with the creation, maintenance and upkeep of the network, and any associated costs with transporting the power.
TUoS
Transmission Use of Service. Any charges associated with the transmission of moving of large quantities of energy across the power grid.
Unit Rate/Cost
The cost you’ll pay per unit of electricity or gas, measured in kWh.
Unlimited Energy Tariff
A tariff that allows you to pay a set amount per month, for a set fee per month. They’re rarely offered due to the volatility of the market.
Unlimited Energy Tariffs
Offer unlimited energy for a year at a specified cost, which is determined by examining old bills. You’ll never be charged additional fees for using more energy.
Unmeasured
A premise that is not on a water meter.
V2G (Vehicle-to-Grid
A system where electric vehicles act as energy storage, allowing their batteries to supply electricity back to the grid during peak demand periods.
Variable Tariffs
The price will vary with the market, fluctuating up and down depending on conditions.
Variation
The difference between different tariffs and energy charges.
Volume Based Charges
A charge that is calculated based on the amount of water received from a meter.
Water Bill
The bill you’ll receive for the water you’ve used at your property. This is usually issued on a monthly basis, but can be done on an annual, biannual, or quarterly basis.
Water Industry Act 1991 (WIA)
The primary legislation that concerns the regulation of the water industry, including sewage services.
Watt
A unit of measure for power, or how fast energy is used.
WHD
Warm Home Discount. Opening on 23rd October 2023 for ‘23/’24 applications, it provides a £150 discount to lower-income households in England and Wales.
Wholesale Costs
The cost of purchasing the electricity and gas you use. It’s normally included as part of your unit cost, and isn’t usually visible on the average utility bill.
Wind Turbine
A large turbine that generates electricity through its spinning blades. It’s one of the UK’s largest forms of renewable energy generation.
WIVGR
Water Industry (Vulnerable Groups) Regulations 1999.
Woodland Credits
One of the more common forms of carbon crediting, these are assigned to businesses that have been involved with or invested in woodland initiatives, such as planting trees or foliage.