Executive Viability Abstract
This feasibility study evaluates the development of a 100MW/200MWh Battery Energy Storage System (BESS) in Ireland, focusing on the EirGrid DS3 system services market and the transition toward 80% renewable energy by 2030. The project demonstrates strong financial viability driven by Ireland's high wind penetration and the critical need for grid stability services.
Return on Investment
18.5% (15-year horizon)
Payback Span
6.2 years
Net Present Value
€42,500,000
IRR Index
17.8%
## Market Analysis
Ireland's Climate Action Plan mandates 80% renewable electricity by 2030. Currently, high wind penetration leads to significant curtailment. The 'Delivering a Secure, Sustainable Electricity System' (DS3) program by EirGrid/SONI creates a high-value market for BESS providing Fast Frequency Response (FFR) and Operating Reserves. Competitive pressure is increasing, but the 'Future of DS3' transition suggests a shift toward long-term auctions and fixed-term contracts, providing revenue certainty.
## Capex Summary
Estimated Total Capital Expenditure: €75,000,000.
- Battery Modules & Inverters (EPC): €55M
- Grid Connection (Contestable/Non-contestable): €8M
- Land Acquisition & Civil Works: €5M
- Soft Costs (Permitting, Legal, Insurance): €7M
## Revenue Model
1. **DS3 System Services**: FFR, POR, SOR, TOR (Primary revenue stream, ~60%).
2. **Energy Arbitrage**: Buying low during peak wind, selling during demand peaks (~25%).
3. **Capacity Remuneration Mechanism (CRM)**: Annual payments for guaranteed availability (~15%).
## ROI Summary
The project shows an Internal Rate of Return (IRR) of 17.8% over a 15-year asset life. While DS3 tariffs are subject to scalar degradation as more capacity enters the market, energy arbitrage spreads in the I-SEM market are widening due to gas price volatility and renewable intermittency.