Spain has approximately 42GW of utility-scale solar and 50GW when rooftop is included, yet less than 100MW of grid-connected battery storage. In February, solar capture rates hit €1.30 per megawatt hour, a fraction of the €30–35/MWh needed for a solar project to break even. So why hasn't battery storage followed the solar boom and could it be the key to rescuing solar revenues?

Pablo Martinez Serrano, Iberia Industry Lead at Modo Energy, joins Ed Porter to break down why Spain's energy market defies easy assumptions, and what the Iberian blackout changed.

They cover:

- Why Spain's hydro fleet masked the need for batteries for years, and why that's no longer enough as solar saturation bites.

- Why solar developers are earning less and less for every unit of power they generate and what that means for the projects still in the pipeline.

- The co-location thesis: why existing solar asset owners are turning to BESS to fix their generation profile and unlock ancillary service revenue

- What actually caused the Iberian blackout: voltage instability, cascading disconnections, and why the TSO had already flagged the risk

- Spain's new voltage control market: how it works, why priority of dispatch may be more valuable than the reactive service payment itself

Want to model battery revenue stacks in Spain or track Iberian power market dynamics? Ko, Modo Energy's AI analyst, is built for exactly these questions. Free sign up: https://help.modo.energy/en/articles/13335470-ko-your-ai-analyst?utm_source=podcast&utm_medium=podcast_apps&utm_id=pablo_martinez

⏱ CHAPTERS

00:00:00 Introduction

00:00:50 What everyone gets wrong about Spain

00:01:54 Spain's generation mix: solar, wind, hydro, gas and nuclear

00:04:43 Seasonal demand dynamics and why spring is the problem

00:06:03 Solar capture price collapse: €42 to below €30/MWh

00:08:19 PPA contracts, negative prices and the solar momentum problem

00:11:52 The co-location pivot: why developers are turning to storage

00:13:58 Why Spain has less than 100MW of batteries vs GB's 6GW

00:15:33 Where the money is coming from: two types of investor

00:17:11 The Iberian blackout: what went wrong and why

00:20:04 How Spain is rebuilding grid stability after the blackout

00:21:04 Spain's new voltage control market and what it pays

00:24:43 Grid forming inverters and the future of ancillary services

00:26:38 Contrarian take: Spain hasn't actually decoupled from gas

00:29:15 The three phases of displacing thermal generators

00:30:39 Closing remarks

You can watch or listen to new episodes every Tuesday. Transmission is a Modo Energy production. Your host is Ed Porter - Director EMEA & APAC at Modo Energy.

Solar Saturation & Grid Collapse: Spain's BESS Opportunity - Modo Energy