Household number outdoor power supply

In 2020, 1.7 billion external power supplies (EPS) were in use in the EU27, of which 75% for residential use, on average 6.5 units per EU household. They converted 48 TWh/a of electricity from the 220V mains to the input needed by the powered products.

What you plan to do in the outbuilding will dictate the power required. If all that is needed is a socket or two and some lighting, then the power requirements are fairly modest, a 13A supply would probably be more than adequate.

If you need more power than that, then you may need to approach your electricity supplier about providing a dedicated supply to your outbuilding. To estimate the total power requirement, think of the likely activities, and what equipment will be involved. What devices could you conceivable need to use at the same time.

In 2020, due to Ecodesign measures, EU27 users saved € 0.9 billion on external power supplies. This is projected to increase to € 1.3 billion in 2030, a 16% saving. In 2030, the annual household expenses for EPS are projected to decrease from € 33 (without measures) to € 28.

If all that is needed is a socket or two and some lighting, then the power requirements are fairly modest, a 13A supply would probably be more than adequate. To power a full workshop including equipment, lighting and heating however may require a far more substantial power supply.

A fundamental requirement for all electrical equipment selected for installation in your outbuilding is that it must be appropriate for the location and the expected use. This does not mean it has to be colour co-ordinated, but it does need to be moisture resistant if the building can not be assured of remaining completely dry.