LEU Calculator
Large Energy User connection · DCCOPP Version 3 · 20 May 2026 · ≥10 MVA
Key inputs
Data centre MIC
100
MVA
IT load: 76.9 MW
(÷ 1.3 PUE)
(÷ 1.3 PUE)
10 MVA200 MVA
Annual demand701 GWh/yr
80% renewable target560.8 GWh/yr
20% residual grid draw140 GWh/yr
Dispatchable generation mix
0%
BESS
Gas CCGT: 100%
of de-rated capacity
of de-rated capacity
0% (Gas only)100% (BESS only)
BESS durationDR: 0.15
118 MW nameplate Gas — BESS
Generation ramp & renewable glide path
Gas (de-rated)
BESS (de-rated)
MIC ramp
80% target
Renewable %
Renewable mix
Wind / solar split
100% wind / 0% solar
100% solar100% wind
Wind nameplate
—
MW (incl. dispatch down)
Solar nameplate
—
MW nameplate
De-rated credit
—
MW off dispatchable req.
Renewables serve a dual purpose: they meet the 80% annual demand obligation and also contribute a de-rated credit against the dispatchable generation requirement. In practice this credit is small — wind de-rates at 0.056× and solar at 0.01× nameplate per CRM T-4 — so dispatchable generation remains the dominant requirement.
Assumptions
DC average annual MIC utilisation
80%
701 GWh/yr
Wind capacity factor
35%
Typical Irish onshore wind
Solar capacity factor
12%
Typical Irish utility solar
Wind dispatch down
30%
DCCOPP V3 App.1: 30%
Dispatchable generation
Gas CCGT nameplate
—
MW @ 0.863 de-rating
BESS nameplate
—
MW @ 0.15 de-rating
BESS storage
—
MWh (2-hr duration)
Revised gas (post ren. credit)
—
MW after wind/solar DR offset
Renewable & energy
Renewable required
—
GWh/yr (80% of demand)
Renewable nameplate
—
MW combined wind + solar
Annual consumption
—
GWh/yr | IT: — GWh/yr
Carbon — gross / post-80%
—
kt CO₂e/yr | 295 g/kWh 2025
Indicative capital cost estimate(order-of-magnitude only — not a quotation)
Gas CCGT
—
€900k/MW
BESS
—
€350k/MW + €300k/MWh
Wind
—
€1.6m/MW
Solar
—
€0.8m/MW
Total indicative capex
—
Generation + renewables (excludes DC build, grid connection, land)