Import supply meters affected by onsite generation

Electricity meters affected by renewable electricity generating equipment


Import supply meters affected by onsite generation

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Since the introduction of the feed-in tariff (FIT) scheme in 2010, an increasing number of consumers have installed renewable electricity generating equipment, such as solar photovoltaic (PV) at their homes or premises. In some cases the import supply meter, which measures the electricity a consumer uses from the grid, is being affected by this onsite generation. This sometimes results in inaccurate meter readings that can lead to billing issues and affect the accuracy of electricity settlement.

This is a complex problem which interacts with different parts of the electricity system. Identifying and resolving the faulty meters requires cooperation from different industry parties. The Office for Product Safety & Standards (Safety & Standards) believe this has led to gaps in identifying and then correcting problems. Safety & Standards welcome the proactive steps that have been taken already by industry participants to resolve this issue going forward.

This joint letter sets out the issues as we understand it and clarifies the current obligations and expectations on industry parties. Alongside this letter, Ofgem have published a domestic consumer factsheet, to answer their questions and to assist them if they suspect their meter is being affected.


If you wish to speak to a member of staff please contact:

Electricity Metering Team

Utilities Team
Office for Product Safety and Standards
Stanton Avenue

TW11 0JZ

Published 14 February 2014