Updated technical guidance by Ofgem released

The Ofgem clarification is good news for people with existing solar homes looking to invest in battery storage alongside a smart meter.
The Ofgem clarification is good news for people with existing solar homes looking to invest in battery storage alongside a smart meter.

Updated technical guidance by Ofgem has clarified the treatment of existing payments for homes that currently export solar power to the grid and that want to install battery storage and smart meters.

The clarification is good news for people with existing solar homes looking to invest in battery storage alongside a smart meter, because it means they will continue to be eligible to keep their ‘deemed’ payments for their solar exports. The market had previously been hindered by conflicting guidance.

Nick Wood, chair of the Solar Trade Association’s (STA) Residential Energy Storage Working Group, said: “The government has been telling the industry that it wants to see battery storage market take off in the UK, but the confusion around installing battery storage with existing Feed-In Tariff-accredited solar has been a key barrier.

“It’s very good news that Ofgem has listened and that it has made the right decision to help unlock the retrofit market. This now means that the domestic battery storage industry in the UK can install batteries and smart meters in existing solar homes with confidence that deemed export payments, which are valued by solar home owners, are safe.”

The news helps to unlock the tremendous potential for storage in the UK’s 900,000 solar homes, which represent low hanging fruit for the smart energy transition.

While the explanation published is complex and would benefit from greater clarity, from conversations with Ofgem the STA is confident the updated configurations published means that, in practice, where a domestic customer already has FIT-accredited solar and wishes to install battery storage behind a smart meter, they can now retain their deemed export payments provided that the usual requirements to quality for deemed export are met.

Recent analysis by Imperial College for Ovo Energy estimates that the full flexibility potential from ‘smart homes’ could save the power system up to £6.9 billion per annum.

STA members are already able to provide smart home functionality, but regulatory barriers for export metering need to be addressed and markets for local flexibility created.