Europe — United Kingdom
HOMER software for energy projects in the United Kingdom
The UK leads Europe in deployed grid-scale battery storage. HOMER Front, HOMER Grid, and HOMER Pro are each used across the distinct layers of the UK energy system — from Capacity Market auctions to C&I behind-the-meter to Scottish island microgrids.
The UK energy storage and modelling landscape
The UK operates one of the most sophisticated ancillary services markets in the world. The National Energy System Operator (NESO), which replaced National Grid ESO in October 2024, procures frequency response, reserve, and reactive power through competitive auctions. HOMER Front models battery assets across these stacked revenue streams alongside Capacity Market obligations.
Elexon administers the Balancing and Settlement Code. Battery assets participating in the Balancing Mechanism — accepting BM instructions from NESO — require revenue modelling that accounts for Bid-Offer Acceptance rates, system price exposure, and energy imbalance cash-out. HOMER Front handles this stacking alongside Dynamic Containment, Dynamic Moderation, and Dynamic Regulation.
For behind-the-meter and distributed assets, Ofgem's regulatory framework — Distribution Network Operator charges, time-of-use tariffs, and the evolving smart export guarantee — creates the economic context for HOMER Grid modelling of C&I, EV charging infrastructure, and data centre resilience.
Grid-scale BESS and ancillary services
The UK's Dynamic Containment (DC), Dynamic Moderation (DM), and Dynamic Regulation (DR) services replaced the legacy Firm Frequency Response product. HOMER Front models battery dispatch across these products, capturing the 1-second response requirement of DC and the slower, higher-energy DM and DR profiles. Stacked with Capacity Market T-1 and T-4 auction revenues, HOMER Front produces the bankable cashflow models that project finance lenders require for UK BESS debt.
Contracts for Difference (CfD) allocation rounds have increasingly included co-located solar-plus-storage projects. HOMER Front's combined generation and storage dispatch engine models these co-located configurations under CfD strike price and capture price assumptions.
Commercial and industrial
UK commercial electricity prices — among the highest in Europe before the Energy Price Guarantee interventions — make behind-the-meter solar-plus-storage, demand flexibility, and Triad avoidance economically compelling. HOMER Grid models C&I sites against half-hourly DNO distribution use-of-system charges, time-of-use rates from major UK suppliers, and the evolving demand flexibility service (DFS) that NESO procures through aggregators.
EV charging infrastructure — both workplace charging and public rapid-charge hubs — represents one of the fastest-growing HOMER Grid use cases in the UK. HOMER Grid models the load profile interactions between EV charging demand, grid import, and on-site generation under Distribution Network Operator connection agreements.
Scottish island and remote systems
Scotland's island communities — the Western Isles, Orkney, Shetland, and the smaller inhabited islands — operate partially or fully isolated power systems. Orkney's Community Energy project and Shetland's diesel-heavy grid are among the most studied energy transition cases in the UK. HOMER Pro models these islanded systems, capturing diesel generation costs, interconnector capacity constraints, and the role of wind, tidal, and hydrogen storage in reaching net zero on islands where grid connection costs are prohibitive.
HOMER Pro's hydrogen module is particularly relevant in the UK context — several Scottish island projects are exploring green hydrogen as seasonal storage and as a fuel for island ferry services.
UK regulatory and market context
Ofgem
Office of Gas and Electricity Markets — economic regulator for gas and electricity networks in Great Britain.
NESO (National Energy System Operator)
Replaced National Grid ESO in October 2024. Procures balancing services including DC, DM, DR, BM. Independent of any transmission owner for the first time.
Elexon
Administers the Balancing and Settlement Code (BSC). Governs how electricity is bought and sold, metered, and settled. Central to understanding BESS trading revenue streams.
Capacity Market
T-1 (one year ahead) and T-4 (four years ahead) auctions for capacity to deliver in a delivery year. BESS routinely clears T-1 auctions. Agreements run 1 year (new), 3 years (refurbished), or 15 years (new-build with enhanced obligations).