Skeeby battery storage project goes live under Alpiq’s 90% stake deal

The Skeeby battery storage project (a 35MW/70MWh facility near Richmond, North Yorkshire) has been energised by Harmony Energy, marking the developer’s first site to go live since Alpiq moved to acquire a 90 per cent stake in the business. The timing matters: the Skeeby project is the first tangible proof point that the Alpiq investment is translating into operational assets, not just a balance-sheet manoeuvre.

Built using Tesla Megapack technology, the system is designed to store electricity generated from sources including wind and solar, then dispatch it to the grid when demand rises. Harmony Energy says it can power around 120,000 homes for two hours. The core logic (store when the grid is long, release when it is short) is straightforward. What the project needs to demonstrate over time is whether it can do so profitably enough to justify the capital, particularly as Britain’s wholesale and balancing markets grow more competitive for battery operators.

Alpiq’s acquisition and what the Skeeby battery storage project signals

The strategic context here is worth unpacking. Alpiq is not simply writing a cheque; it is acquiring a 90 per cent stake in Harmony Energy, positioning itself as a majority owner of a pan-European developer and operator of battery energy storage systems. Harmony Energy’s CEO, Peter Kavanagh, framed Skeeby accordingly, saying the site’s energisation matters ‘not only because it brings another important battery storage project online, but because it is the first site to be energised since our strategic investment from Alpiq.’

Kavanagh added that the Alpiq backing gives Harmony Energy ‘additional backing to accelerate the delivery of projects like this across the UK and Europe, while continuing to operate with the same team, brand and development expertise.’ That last clause (same team, same brand) is the kind of assurance developers typically offer when a majority sale risks unsettling existing counterparties or pipeline relationships. Whether that continuity holds in practice is a question the pipeline will answer.

A German pipeline and a French project add substance to the European ambition

The Alpiq story does not rest on Skeeby alone. According to Mercom Capital Group, Harmony Energy has secured a development financing facility from Navigator Energy Debt Finance (NEDF), a Triple Point-managed partnership, expected to support the development of 3 GW of battery energy storage system assets in Germany. That is a significant pipeline commitment, and it puts some numerical weight behind the pan-European rhetoric. Germany’s grid, with its high penetration of intermittent renewables and ongoing coal phase-out, creates genuine demand for large-scale flexibility, so the market logic is defensible, even if 3 GW of development pipeline is a long way from 3 GW of operational capacity.

Alpiq’s own parallel moves reinforce the picture. According to Energy Storage Europe, a 100 MW battery energy storage system in the department of Oise, north of Paris, is scheduled to be commissioned in autumn 2026. Taken together, a live Yorkshire asset, a 3 GW German development pipeline, and a 100 MW French project approaching commissioning, the scale of the combined entity’s ambitions becomes clearer. The question for ESG analysts and infrastructure investors is whether the revenue streams backing that pipeline are sufficiently contracted, or whether the business is running long on capacity factor assumptions.

At Skeeby, Harmony Energy is also delivering biodiversity measures alongside support for Richmond Bike Park, a free-to-access bike skills park expected to launch in late 2026. Community benefit measures of this kind are increasingly standard for energy infrastructure consents, modest in carbon terms, but useful for social licence.

The more substantive environmental claim rests on curtailment reduction: by absorbing surplus clean power that would otherwise be constrained off, the project can improve the effective utilisation of existing wind and solar capacity. That is a genuine grid benefit, though the Scope 2 accounting implications depend on how the stored energy is ultimately dispatched and whether the offtake is matched against renewable generation on any certified basis. Harmony Energy has not, in its public statements on Skeeby, addressed those specifics.

The next operational test for the combined Harmony Energy-Alpiq portfolio is the Oise commissioning, currently targeted for autumn 2026.