PAS 1878:2021 and PAS 1879:2021 Explained

The British Standards Institution (BSI) recently published two new standards for energy efficient appliances: PAS 1878:2021 and PAS 1879:2021, which are designed to be read in conjunction with each other. The standards came into effect on 31st May 2021.

PAS 1878:2021

PAS 1878:2021 addresses the operation of energy smart appliances (ESAs). It specifies the requirements and criteria that an electrical appliance needs to meet to perform and be classified as such. It defines the attributes, the functionalities and performance criteria for an ESA as well as specifying how compliance with these can be verified.

PAS 1879:2021

PAS 1879:2021 provides a set of minimum recommendations to perform Demand Side Response (DSR) based activities involving electrical appliances that are used in either domestic or small business settings. This standard addresses the demand side response operation of ESAs. The minimum recommendations that are set out in PAS 1879:2021 ensure that a sufficient level of interoperability, security and optionality is met all the while not limiting the opportunity for product and service innovation.

PAS 1879:2021 is aimed at organisations who are responsible for supplying energy services to domestic or small business premises. Within this PAS there are also cyber security principles set out, and these apply to organisations that perform any form of DSR or send remote signals to appliances to shift or modulate their energy consumption of supply.

What is the purpose of these two standards?

The purpose of PAS 1878:2021 and PAS 1879:2021 is to enable standardised control, subject to explicit consumer consent, of ESAs, to:

  • match the short-term availability of intermittent renewable energy generation sources;
  • decrease the peak load on the electrical transmission and distribution networks to alleviate the need for network upgrades to handle new domestic appliance types;
  • allow control of electricity network characteristics and help prevent network and generation outages; and
  • to allow the offset of short-term market imbalances by controlling flexible load on the network.

Faisal Hussain, HIES Chief Executive, comments:

“The two new standards are extremely important, and we strongly encourage installers to familiarise themselves with them. However, it is just as important that consumer protection be considered alongside these two new standards and for that consideration to happen at an early stage.”

Click here to download PAS 1878:2021 and click here to download PAS 1879:2021.

Image by Gerd Altmann from Pixabay