CAE system · Frequently asked questions
Who can benefit from CAE.
Who the owner of the energy saving is and in which cases they can cede it in exchange for consideration.
- Can an individual benefit from CAE?
- Yes. Any individual who carries out a savings-generating action (e.g. installing an air-source heat pump) owns the saving and can cede it to an SO/SD in exchange for consideration.
- If I'm neither an SO nor an SD, are CAE of interest to me?
- Yes, if you are going to carry out an energy-efficiency action: as the owner of the saving you can cede it through a CAE agreement (to an SO/SD) or a private cession contract (to an intermediary) and be paid for it (RD 36/2023, art. 12.1).
- Can a company monetise its savings?
- Yes, any company that invests in efficiency (lighting, HVAC, processes, fleets…) can cede the savings. For large projects not in the catalogue, via a non-standard action.
- Can a homeowners' association generate CAE?
- Yes (building envelope, windows, centralised boilers, etc.). The agreement must be signed by the president with a digital certificate (mandatory for applications from 15/12/2024) or by the property manager with an express mandate from the owners' meeting documented in the minutes.
- Can a public-sector entity cede its savings?
- Yes, if it has made the investment. The cession may take any legal form (contract, agreement, auction, even the tender specifications themselves with the breakdown of the consideration), provided it includes: determination of the savings, express cession of ownership and onerous consideration.
- In a rented home, the owner or the tenant?
- The owner of the saving is whoever makes the investment. If the landlord pays for it, it is theirs; if the tenant pays for it, it is the tenant's. It is advisable to document this (invoice in the name of whoever invests).
- Renting and leasing? (criterion in force since 15/07/2025)
- Renting (operating lease): the owner of the saving is the supplier of the asset, who must demonstrate that they pass part of the income on to their customers. Finance lease: the owner is the lessee (end user). These are arrangements treated differently in the CAE system.
- Can the installer cede its customers' savings?
- Only if it has first acquired ownership through a private cession contract signed with the customer (the original owner). Important: in agreements signed from 15/12/2024, only one intermediary at most is allowed between the original owner and the SO/SD.
- Can a company in the energy sector generate eligible savings?
- Yes, provided the saving does not come from the energy transformation, transport or distribution itself. Eligible examples include renovating its offices or telemetry in its fleet; not eligible are improvements to the refining process or the transmission grid.
- Can several actions be grouped in one application?
- Yes: standardised actions carried out in the same year and in the same autonomous community can be grouped in a single application, with a single verification opinion for the whole set (if one fails, the opinion is unfavourable for all of them) (Orden TED/815/2023, art. 13.5).
Main sources: official FAQ of the CAE System, MITECO v1.6 (23/04/2026); Real Decreto 36/2023; Orden TED/815/2023; Orden TED/845/2023; Orden TED/133/2026; 2026 market references. This text is informational and has no legal value; the applicable regulations always prevail.
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