David Mirzai at SP Angel argues EnergyPathways (AIM:EPP)’ launch of front‑end engineering and design on the Marram Energy Storage Hub (MESH), a proposed 300MW/55GWh compressed air energy storage project, positions the company to harness curtailed offshore wind and push for a final investment decision in 2028.
He says the CAES design, using purpose‑built offshore salt caverns, offers multi‑day dispatch at lower storage cost than batteries or pumped hydro, and so can capture value beyond hour‑scale arbitrage into longer duration energy cycles.
Mirzai points to the Siemens Energy FEED partnership, the project's proximity to crowded offshore wind assets and a March estimate that annual BESS revenues ran around £70,000/MWh as supporting signals that MESH can access a more diversified revenue stack including capacity, multi‑day arbitrage, frequency response, inertia and peaking services.
He adds the thesis will be tested through the FEED outcomes and the targeted 2028 FID, ahead of the project's expected commercial operation in late 2031.
