Accelerated Capital Allowance (ACA)
ACA is a tax incentive for companies paying corporation tax and aims to encourage investment in energy efficient equipment. The ACA offers an attractive incentive whereby it allows companies to write off 100% of the purchase value of qualifying energy efficient equipment against their profit in the year of purchase.

The formal acceptance of an energy supply contract offer from a supplier. Acceptance of the offer must be in writing, but does not constitute a contract. Bravo Energy can be authorised to act on the client's behalf with respect to 'accepting' a contract offer.

Acceptance time/date
The time and date by which a supply contract offer must be accepted, failure to 'accept' will result in the offer being withdrawn.

Active Power
Also known as Real Power or simply Power. Active power is the rate of producing, transfer or using electrical energy. Measured in watts and often-expressed in kW or MW.

In the context of renewable generation, additionality is about whether the customers action or decision has made a genuine reduction in emissions above and beyond what would have happened anyway.

Advanced Conversion Technology
It is a new and developing thermal processes, such as gasification and pyrolysis, which can be utilised to dispose of Municipal Solid Waste (MSW).

Advanced gas-cooled reactor (AGR)
A nuclear reactor which is cooled by carbon dioxide gas.

Agreed Capacity
An agreed amount of electrical load for a property, as stated in the property's Connection Agreement with the Network Operator.

Air Handling Unit (AHU)
An equipment package that includes a fan or blower for providing heating, ventilation and air conditioning (HVAC) to a building. Efficiency is improved through enabling control.

Air Source Heat Pump (ASHP)
The heat pump absorbs heat from the outside air and transfers the heat to the space to be heated in the heating mode. In the cooling mode the heat pump absorbs heat from the space to be cooled and rejects the heat to the outside air.

All-inclusive offer
An offer to supply electricity to a supply-point at a fixed price which is inclusive of delivery charges (DUoS & TUoS) - see Energy only offer.

Allocation Agreement
Some meter (supply) points are supplied by more than one Supplier. An Allocation Agreement sets out how the metered gas flow will be divided between them for billing and management purposes.

Alternating Current (AC)
Electricity that changes direction periodically. The period is measured in cycles per second (Hertz, Hz).

American-Style Option
An option which can be exercised at any time during its life by the purchaser - generally more expensive than European-Style options which can only be exercised at expiry.

Amp (Ampere)
The unit that measures the rate of flow of an electrical current.

Anaerobic Digestion
A biological process that produces a gas principally composed of methane (CH4) and carbon dioxide (CO2) otherwise known as biogas. These gases are produced (in the absense of oxygen) from organic wastes such as livestock manure, food processing waste, etc.

Annual Quantity (AQ)
The maximum quantity of gas measured in therms or kW which the network operator estimates a supply point will use during one year, the AQ is based upon the previous year's consumption at the same site and takes no account of any change of ownership, tenancy or use which might have taken place.

Apparent Power
The product of the voltage (volts) and the current (amps). Comprises both active and reactive power. Measured in kVA or MVA.

Amsterdam Power Exchange, run European spot market platforms.

Amsterdam, Rotterdam and Antwerp, the European pricing hub.

A purchase in one market and sale in a different market or different commodity to capitalise on what appears to be a temporary price distortion.

The simultaneous purchase of one commodity against the sale of another in order to profit from fluctuation in the usual price relationship.

Asian Option (Average Rate Option)
Gives the buyer the right to deal at the average price of the underlying asset over the life of the option. Normally a European-Style exercises.

At the Market
A futures order placed at the market, executed immediately at the price available when the order reaches the trading floor.

An option whose exercise price equals or is close to the current price in the underlying market.

Generation of electricity by companies for their own use, whose main business is not electricity generation.

Automatic Meter Read (AMR)
AMR is the term given to a system that provides automatic meter readings remotely. It uses telephone technology and holds the ability to transfer data into a billing system.

Availability (kVA) or Agreed Capacity refers to the limit of capacity for a site, e.g. if a site has an Availability of 150 kVA then maximum demand should not exceed that figure at any time. It is set and charged by the local Distribution Network Operator (DNO), according to the kVA of a premise. This fee covers investment and maintenance of the electricity network and can also be called the Capacity Charge. Customers pay a fee (per unit) according to the agreed capacity for that site. In theory, maximum demand should not exceed the agreed capacity at any time.

Availability Charge
A charge levied each month for each unit of kVA made available by the Distribution Company.

Available Supply Capacity (ASC)
Also known as the Agreed Capacity, this is an agreed amount of electrical load for a property, as stated in the property's Connection Agreement with the local Network Operator.