Sofia Offshore Windforce 2020 3rd September 2020

David Few CEng FICE Project Director Sofia is 100% owned by RWE

No. No. No.

globally in in renewables globally in renewables in Europe offshore wind

31 August 2020 2 Sofia is part of RWE’s* UK offshore wind fleet

* Operated, fully or partly owned by RWE

England – North Sea 1400MW

Wales – Denbighshire/Conwy 576MW England – Lincolnshire 857MW

England – Humberside 219MW – Conwy 90MW England – Suffolk 353MW

In Operation England – In Construction Suffolk Consented 60MW Wales – Denbighshire 60MW England – Suffolk 503MW England – Sussex 3 31 August 2020 400MW Track record of installing bigger turbines, farther from shore and in a range of water depths

Greater Thornton Nordsee North Hoyle Gabbard Bank Gwynt y Môr Nordsee Ost One Galloper Sofia Project 2004 2010 2012 2009 – 2013 2015 2015 2017 2018 2021/22 2025/26 (Expected) CoD 60 MW 90 MW 504 MW 325MW 576MW 295MW 332MW 353MW ~860MW ~1400MW Capacity 30 × 2.0MW 25 × 3.6MW 140 × 3.6MW 54 × 5-6.15MW 160 × 3.6MW 48 × 6.15MW 54 × 6.15MW 56 × 6.3MW 90 × 9.5MW Up to 200 x TBC Turbines 7 – 11m 10 – 15m 24 – 34m 12 – 30m 12 – 28m 22 – 26m 26 – 29m 27 – 36m 15 – 24m 21 – 36m Water depth 7 km 8 km 23 km 28 km 13 km 60 km 45 km 30 km 32 km 195 km Distance to shore 1.0 ROC + WS 1.5 ROC + WS 2.0 ROC + WS WS + Certificate 2.0 ROC + WS EEG 20145 EEG 20145 1.8 ROC + WSUK CfD UK CfD Support scheme

Monopile Jacket

In operation Under construction Final development

31 August 2020 4 1.4GW - the largest project in RWE Renewables’ development portfolio

Development & Developed and owned 100% by innogy since ownership 2017. One of four projects consented by the consortium

Status Won a Contract for Difference in UK 2019 auction

Support scheme UK CfD - £39.65/MWh for 15 years

Investment ~£3 billion FID FID planned for Q1 2021 Consents All required consents are in place Next steps Further development to achieve a positive final investment decision

31 August 2020 5 Sofia Offshore Wind Farm Sited on Dogger Bank in the central North Sea

Key facts and figures

Location and 195 kilometres off the UK’s North East coast size on a 593 km2 site on Dogger Bank Capacity Consent for up to 1400 MW Number and 100 turbines size of Maximum tip elevation - 262 metres turbines Blade length – 108 metres Water depths 21 to 36 metres on site Up to 80 metres along export cable route Landfall Between Redcar and Marske-by-the-Sea, Teesside Grid Located at Lackenby, Teesside connection Generation Potential to power more than 1.2 million average UK homes with each year

31 August 2020 6 Onshore cable route – landfall in Teesside

31 August 2020 7 Sofia project timeline as at August 2020

All dates are indicative and 2026 subject to change Project fully operational

Q1 2025 First generation and start of Q1 2023 commissioning Start of offshore construction Q1 2021 Final investment decision and start of onshore construction

Q4 2020 All preferred suppliers chosen

September 2019 Contracts for Difference auction 8 Prime package structure: Design > Manufacture > Install

National Grid Substation Onshore Converter Offshore Converter Wind Turbines Station Transition Platform Joint Bay

> To the national grid Foundations

Wind Turbine Contractor

Foundations Supplier

HVDC Onshore Cable Export Cable Supplier HVDC Array Cable Supplier Contractor Supplier Contractor

31 August 2020 9 generators Status: preferred supplier agreement with Technology 14MW capacity, largest currently on market Three blade horizontal axis turbines 25 year design life 25% more powerful than SGRE’s previous version

Key activity to Awarded preferred supplier agreement in June date 2020

Current status Finalising contract with preferred supplier

Timeframe Ready for FID in Q1 2021

31 August 2020 10 WTG Foundations Status: tenderers shortlisted

Technology Monopile foundations with transition piece Variant designs also being considered

Key activity to Concept designs completed date Tenders received and suppliers shortlisted

Current status Optimizing and final tendering

Timeframe Preferred supplier to be chosen late 2020

31 August 2020 11 Electrical system – status: agreement signed with GE’s Grid Solutions and Sembcorp Marine

Technology 1320MW HVDC +- 320kV DC Converter System

Key activity Parallel FEED studies with suppliers to to date define scope, programme, converter layouts & costs. Preferred supplier consortium selected Current Early works contract with preferred status suppliers GE’s Grid Solutions and Sembcorp Marine commenced in July 2020

Timeframe Ready for FID in Q1 2021

31 August 2020 12 Onshore and offshore cables Status: tenderers shortlisted

Technology 320kV HVDC export cable plus fibre optic communications 66kV AC 3-phase cores plus integrated fibre optic communications

Key activity to Tenderers shortlisted date

Current status Optimizing and final tendering

Timeframe Preferred supplier to be chosen late 2020

31 August 2020 13 Thank you. Any questions?