Battery Storage & The Irish Grid

Energy Markets Research Collective • Mixed late 2026

01 The 90% Cost Drop 3:42 Battery cell costs have plummeted, but grid-scale installation costs tell a different, less dramatic story.

02 Revenue Stacking Blues 4:18 No single market mechanism makes BESS viable. You need arbitrage, DS3, and capacity payments layered together. ← important!

03 Pipeline Dreams 3:55 2.4 GW in the planning pipeline, but the market can only profitably absorb a fraction of that capacity.

04 The IRR Doesn't Add Up 5:01 Developers claim 5-6% IRR, but reconciling with actual cash flows gives you something closer to 1-3%. listen twice

€141

Avg MWh Price

2.4GW

Pipeline

~3%

Actual IRR

Play this one loud with the windows down. The numbers don't lie, but they do whisper. You have to lean in close to hear what the market is really saying.

— E.M.R.C.

TRACK 05

Wholesale Arbitrage

Buy low at night, sell high at peak. Simple in theory, gnarly in practice with degradation and curtailment.

^ the classic trap

TRACK 06

DS3 Services

The most reliable revenue stream for grid batteries in Ireland, but limited contracts and growing competition.

TRACK 07

Capacity Payments

Getting paid to be available. A steady floor under revenues, but not enough to justify investment alone.

boring but important

TRACK 08

Technology Risk

Lithium-ion is the incumbent, but sodium-ion and flow batteries are warming up in the wings.

TRACK 09

Regulatory Roulette

Policy changes can reshape the revenue landscape overnight. The rules of the game keep shifting.

TRACK 10

The Bottom Line

Data says wait. The opportunity is real but the timing isn't right. Patience over FOMO.

rewind and replay