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Moody's says proposed A-to-G green grades for bit barns could affect financing

The European Union's proposed environmental rating system for datacenters could could carry significant credit implications for facility operators and their lenders when they are finally implemented.

The European Commission published draft regulations in March proposing an A-to-G rating scale for datacenters based on energy and water efficiency. The system is intended to drive greater sustainability in an industry forecast to expand sharply over the next decade, fuelled by surging demand for AI and cloud services.

These plans have since stalled. According to Politico. the Commission delayed the scheme following heavy industry criticism, despite ratings having been due to take effect from August 2027.

The pause has not, however, eliminated the risk. A report from global risk assessment biz Moody's warns the rating system could have both operational and credit consequences for bit barn operators. 

The European Central Bank's (ECB) 2021 climate action plan made the integration of climate risks into its collateral framework a stated priority, meaning that across EU member states, firms with stronger environmental ratings are statistically more likely to secure lines of credit and less likely to face heavy collateral requirements. 

One of the most contentious objections to the proposed scheme is its failure to account for Europe's climate diversity. Members of the Climate Neutral Data Centre Pact (CNDCP) published a paper stating that "without embedded climate normalization, facilities operating under different environmental conditions cannot be fairly compared."

A datacenter in southern Europe will inevitably consume more cooling energy than an identical facility in a cooler climate, not because of inferior design or operations, but because of where it sits on the map. Under the current proposal, that geographic disadvantage would show up as a lower efficiency rating.

Beyond the rating system itself, Moody's flags Europe's fragmented financing landscape as a structural drag on datacenter development. Projects spanning multiple currencies and jurisdictions face compounding layers of regulatory and legal complexity that inflate costs. Matching the scale and pace of US and Chinese datacenter build-outs, the report suggests, is unlikely without structural reform.

Tripling EU datacenter capacity over the next five to seven years would require between €250 billion to €500 billion capital investment. 

Decentralization will be critical to achieving that. The FLAP-D cluster - Frankfurt, London*, Amsterdam, Paris, and Dublin - currently dominates European capacity but each market faces serious constraints in further growth: power availability, severe grid congestion, land scarcity, and, in some cases, growing public opposition to datacenters.

As The Register has previously reported, the pressures are shifting development toward secondary markets, particularly in the Nordics and southern Europe.

These areas tend to offer better access to power, more available land, and shorter grid connection timelines. Nordic markets also carry the advantage of a cooler ambient temperatures and ample water resources, which can lower long-term operating costs.

Overall, Europe's AI compute capacity continues to lag well behind the US and China - a gap that will persist, Moody's argues, until the structural barriers outlined above are addressed. ®