Alettaoceanempirecompletesiteripmegapack20 39link39: 2021
| Phase | Planned | Actual | Comments | |-------|--------|--------|----------| | Engineering & Procurement | Jan 2020 – Jun 2020 | Jan 2020 – Apr 2020 | Early supplier lead‑time reductions saved 2 months. | | Marine Fabrication | Jul 2020 – Feb 2021 | Jul 2020 – Jan 2021 | Accelerated by parallel sub‑assembly. | | Transportation & Installation | Mar 2021 – Aug 2021 | Mar 2021 – Sep 2021 | One‑day delay due to a tropical storm (Storm Eira). | | Commissioning | Sep 2021 – Oct 2021 | Sep 2021 – Sep 2021 | Completed ahead of schedule. | | Commercial Operation | Oct 2021 | Sep 2021 | Early entry into service (first revenue month). |
Critical Path: Battery module delivery → Marine platform integration → HVDC converter installation.
Risk Management: A comprehensive Marine‑Installation Risk Register was maintained (see Annex A). No major safety incidents occurred.
| Lesson | Explanation | Recommended Action | |--------|-------------|--------------------| | Modular design reduces schedule risk | The “plug‑and‑play” rack system allowed simultaneous offshore and on‑shore works. | Continue to standardise rack dimensions for future Megapack‑X series. | | Corrosion data should be logged continuously | Unexpected micro‑galvanic currents were detected on the first‑month inspection. | Deploy permanent corrosion
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| Year | Milestone | |------|-----------| | 2018 | Feasibility study (Aletta Energy + Oceanic Infra) – identified “Megapack‑20” as optimal size to match 20 % of the 250 MW wind farm’s peak output. | | 2019 | Concept selection: Tesla‑Giga‑Battery 4 MWh modules, 5 modules per rack, 4 racks. | | 2020 | Detailed engineering & marine platform design (sub‑sea‑rated steel jacket, anti‑corrosion coating, wave‑motion isolation). | | Jan 2021 | Final investment decision (FID) – capital budget approved at USD 85 M. | | Apr 2021 | Procurement of battery modules and marine‑installation contract (Marine‑Construct Ltd.). | | Sep 2021 | Commissioning, successful “Grid‑Sync Test” with National Grid. | | Phase | Planned | Actual | Comments
| Metric | Value (2021 USD) | Benchmark / Comment |
|--------|-----------------|---------------------|
| CAPEX | 85 M | 15 % lower than average offshore battery (≈ USD 100 M). |
| OPEX (annual) | 3.2 M (≈ 3.8 % of CAPEX) | Includes battery warranty, O&M crew, insurance, and grid‑connection fees. |
| Revenue streams | • Energy arbitrage (peak‑shaving): USD 4.5 M/yr
• Frequency‑response market: USD 2.2 M/yr
• Capacity market “Firm Capacity” payments: USD 1.7 M/yr | Total 2022‑2025 revenue ≈ USD 8.4 M/yr. |
| Pay‑back period | 5.8 years | Based on a 7 % discount rate, 2022‑2027 cash‑flow forecast. |
| IRR | 12.4 % | Meets AOE’s hurdle rate of 10 %. |
| NPV (10‑yr horizon) | USD 31 M | Positive, driven largely by ancillary‑service earnings. |
| CO₂e avoided | ~ 0.45 tCO₂e/MWh | Compared to diesel‑gen backup (≈ 0.7 tCO₂e/MWh). |
Assumptions: Market price volatility (average £ £70/MWh), frequency‑response remuneration (£ 30/MW‑h), no major regulatory changes.
| Item | Summary |
|------|----------|
| Project name | iTerip Megapack‑20 (internal code 39‑Link‑39) |
| Owner/Lead consortium | Aletta Ocean Empire (AOE) – a joint‑venture between Aletta Energy Holdings, Oceanic Infrastructure Group and Empire Renewable Solutions. |
| Scope | Installation of a 20 MW / 80 MWh lithium‑ion battery storage system (the “Megapack‑20”) at the offshore wind hub “Lighthouse 39” in the North Atlantic. |
| Location | 45°12′ N, 12°34′ W – 12 km off the coast of Scotland, within the “North‑West Atlantic Renewable Zone”. |
| Completion date | 14 September 2021 (commercial operation start). |
| Key objectives | 1) Provide firming and frequency regulation for the adjacent 250 MW offshore wind farm.
2) Demonstrate grid‑scale battery performance in a marine environment.
3) Create a replicable template for future offshore storage assets. |
| Outcome | • 99.8 % availability in the first 12 months.
• 1.6 % reduction in wind‑farm curtailment (≈ 4 GWh/year saved).
• 0.45 tCO₂e/ MWh avoided compared with diesel‑gen backup. |
| Financials | Total capital cost: USD 85 M (incl. marine platform, battery modules, installation).
Capital cost per MWh: USD 1,060/kWh (≈ 15 % lower than the 2021 global average for offshore battery storage).
Projected pay‑back: 5.8 years (based on market‑price arbitrage and ancillary‑service revenues). |
| Stakeholders | • Aletta Ocean Empire (project sponsor)
• UK National Grid (system operator)
• Marine Scotland (regulatory authority)
• Ørsted – Wind farm owner
• Tesla‑Giga‑Battery (module supplier)
• DNV‑GL (independent verification) |
| Strategic impact | • First offshore battery of ≥ 80 MWh in the Atlantic region.
• Demonstrated corrosion‑resistant enclosure system now being licensed for export.
• Enabled 2023 UK “Zero‑Carbon Grid” roadmap milestone of 10 % offshore storage capacity. |