Solar and renewables installers A–Z dictionary

UK trade reference · plain English

Safety: use a registered electrician, for example one registered with a competent person scheme such as NICEIC or NAPIT, for electrical installation work. Do not remove covers or open electrical equipment yourself.

Compare system designs rather than headline equipment ratings. Heat loss, roof conditions, electrical capacity, controls and real usage can be more important than the panel count or a single laboratory efficiency figure. Installation certification, network procedures and funding eligibility are separate checks. Do not treat generation forecasts as guaranteed savings. Keep commissioning information and ensure the property owner controls monitoring accounts.

This A–Z combines useful technical vocabulary with links to full references where the article meets our depth and sourcing checks. An unlinked definition is intentionally kept here rather than turned into a shallow standalone page. Read a quotation against its actual scope: a familiar word is not a complete specification.

For chats and social posts, explore free solar and renewables installers stickers and emoji images. These are decorative downloads, not technical symbols or certification marks.

A

Air source heat pump
An air source heat pump uses electricity to move heat from outside air into a building. In an air-to-water system it supplies water-based heating and usually a hot water cylinder. An air-to-air system distributes warmth through indoor air units. These arrangements meet different needs and should not be treated as identical products.

B

Battery capacity
Stored-energy capability under specified conditions. Nominal capacity and energy actually available for household use may differ.
Battery storage
Battery storage stores electricity for later use. A domestic system includes more than battery cells: controls, electrical conversion, protection and installation location all affect how it operates.

C

Commissioning
Verification and setting of the installed system, including relevant controls, records and user access to monitoring.

E

Export
Electricity sent to the network rather than used on site. Connection permission and payment arrangements are separate questions.

G

Generation forecast
An estimate based on stated assumptions about the system and site. It is not a guaranteed saving or output.
Getting into solar installation
Solar photovoltaic installation brings together roof work, electrical installation, design and commissioning. A team may contain different specialists. Entry routes must distinguish mounting panels from electrical connection and verification, rather than suggest that a short product course gives a novice every skill needed for a complete installation.

I

Inverter
Equipment converting electrical power in the system. Capabilities differ, including whether operation during a grid outage is supported.

M

MCS certification
MCS certification is a scheme for relevant small-scale renewable-energy products and installation businesses. Installer certification, product listing and the certificate for an individual installation are different checks. MCS is not a universal statutory licence or a guarantee that every renewable project receives a grant or achieves identical savings.

O

Orientation
The direction a collector or array faces. It affects performance alongside shading, inclination and system design.

S

Self-consumption
Using generated energy on site rather than exporting it. Practical results depend on timing and household demand.
Shading
Reduced solar exposure caused by surrounding obstructions. Its effect depends on location, time and the array arrangement.
Solar photovoltaic (PV)
Solar photovoltaic equipment converts daylight into electricity. A typical building installation includes modules, electrical wiring, an inverter and connection equipment, with storage optional rather than automatic.
Solar PV installation
Solar photovoltaic installation fits equipment that converts daylight into electricity for use in a property or export to the network. A typical system includes panels, mounting, DC wiring, an inverter and electrical protection. Solar PV generates electricity; solar thermal collectors heat a fluid and are a different technology.

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Sources and further reading

Linked article sources support the technical background; informal usage is editorial and varies by region. Full specification and legal requirements must be checked in the original.

Sources checked: 8 November 2026. General reference, not instructions for safety-critical DIY. National regulations and current standards must be checked for the project.

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