25/07/09
Market eyes grid balance as Europe tests granular GOOs
Market eyes grid balance as Europe tests granular GOOs
London, 9 July (Argus) — Irish and Danish electricity suppliers have recently
tested the use of granular guarantees of origin (GOOs), matching production and
consumption on an hourly basis. But as concerns about grid balance remain among
participants in the wider European GOO market, a gradual approach might be key.
Software provider Granular Energy this week announced the results of a pilot
with Irish suppliers Electric Ireland, Flogas and SSE Airtricity and GOO
registry provider Grexel — part of EEX group. This aimed to test a "hybrid
system", in which hourly matched GOOs are used alongside less granular
certificates. Participating suppliers received hourly GOOs for output from
selected renewables assets, and cancelled them on behalf of users for their
April 2025 consumption. Granular Energy acted as the issuing body, while Grexel
provided a "sandbox version" of the national GOO registry, enabling the
coexistence of certificates at different levels of granularity. One of the key
findings of the study was that "allowing a phased, opt-in rollout" can help
reduce overall data volumes and preserve compatibility with the rest of the
Association of Issuing Bodies (AIB) hub, according to Granular Energy. "This
kind of optionality creates a clear path for Ireland and EU member states to
gradually transition to hourly systems independent of an EU-wide overhaul,"
Granular Energy co-founder and chief operating officer Bruno Menu said. The
pilot follows a late-2024 report by the Sustainable Energy Authority of Ireland
that recommended an upgrade of the national GOO system to enhance emissions
reporting for "large energy users", such as data centres. Grexel has recently
been awarded funds to help interested GOO issuing bodies develop hourly tracking
infrastructure. Meanwhile, Danish electricity supplier Reel also recently
completed a pilot with Granular Energy and national transmission system operator
Energinet, with the results announced at the end of June. As part of this, five
Danish companies matched their electricity consumption to GOOs on an hourly,
weekly and monthly basis. Wider push The 24/7 Carbon-Free Coalition — part of
international non-profit Climate Group — in June released its first technical
criteria for companies claiming to use carbon-free electricity (CFE) globally,
recommending the use of hourly matching for all claims based on certificates. In
addition to that, standard-setting group Greenhouse Gas Protocol has been
conducting a review of its reporting standards. Based on initial feedback , the
technical group working on scope 2 emissions — covering indirect emissions from
purchased energy — is updating inventory rules with greater granularity, with a
public consultation to be launched later this year. A fine balance Some GOO
market participants are concerned about 24/7 CFE matching creating a new system
of incentives that could ignore the needs of the wider electricity network,
where consumption and production must be balanced at all times. In a 24/7 CFE
system, players could make decisions based on their contracted renewable assets,
rather than respond to real-time signals from the grid, independent originator
Axel Baudson told Argus . For example, power oversupply "on a beautiful sunny
afternoon" — when renewables production is high — could increase if renewables
generators are contractually obliged to deliver hourly matched certificates, he
explained. For this reason, granular matching should be expanded "with a
perspective of dynamic grid balancing", Baudson said. These "suboptimal"
scenarios are minimised "once a larger pool of consumers and producers is
involved", Granular Energy's Menu told Argus in response, explaining that the
ultimate aim is to move from individual corporate strategies for procuring
granular GOOs to "a broader optimisation at the country level". This creates
price signals and drives better alignment with the needs of the grid, he added.
Under the annual disclosure regime — the most common across European countries —
consumption can be matched to output at any point during the disclosure year to
reach zero emissions. This is often not possible when first moving to hourly
disclosure, Menu explained, because of the reality of physical power flows
during the day. This, in turn, creates more incentives to decarbonise the wider
grid and invest in storage capacity. Annually (mis)matched Even within the
current annual system, disclosure rules and certificates' expiry periods differ
across European countries . Some national registries allow GOO cancellations for
12 months from the energy production, while others extend this to 18 months. A
harmonised framework for annual disclosure should be the priority, several GOO
traders told Argus , before gradually adopting more specific timeframes, such as
quarterly and monthly. France has the most granular disclosure system in the AIB
hub, requiring monthly matching, with certificates typically commanding a
premium to Europe-wide contracts. Current-year French GOOs from solar, wind and
hydropower traded at an average of €0.93/MWh at the end of June, above average
Argus assessments of €0.74/MWh for 2025 European wind and solar and Nordic hydro
GOOs. By Giulio Bajona Send comments and request more information at
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