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Coupling renewables and cleanflexibility growth, the EU can benefit fromabundant home-grown wind and solar, reduce dependence on importedfossil energy, and avoid costs. Published date: 26 September 2024Lead author: Dr. Beatrice Petrovich, Harriet Fox, Dr. Chris Rosslowe Contents Executive SummaryMoreflexibility brings benefitsRenewables and cleanflexibility are a perfect matchThe EU cannot afford to delay cleanflexibility deploymentMore hours already powered by wind and solar in the EUPairing solar with batteriesAn opportunity for batteries emerges as solar boomsBatteries can reduce evening fossil relianceRecommendationsSupporting MaterialsMethodologyAcknowledgements About This report analyses the system benefits of coupling renewables with cleanflexibility, with afocus on the opportunity for pairing solar electricity generation and battery storage in the EU. Using Ember’s dataset on hourly generation mix and power prices in the EU, the analysisdemonstrates that midday solar abundance is a valuable resource. It illustrates theopportunity for cleanflexibility to reduce the EU’s fossil dependance and avoid energy costs.It concludes with recommendations for next steps on cleanflexibility in the EU to keep pacewith ambitious decarbonisation goals, with a focus on deploying battery storageimmediately. Highlights 36 GWh Between August 2023 andJuly 2024, nine EU countriessaw solar alone exceeding80% of their hourly domesticdemand. In 2030, the EU could avoidgas costs worth €9bn bycapturing excess wind andsolar. Germany could haveavoided 36 GWh ofexpensive fossil power andup to €2.5mn fuel costs inJune 2024 alone with 2 GWmore of additional batteries. Executive Summary Moreflexibility brings benefits With faster cleanflexibility rollout, the EU can get home-grown cheaprenewable power around the clock. A power system backed by renewables will need to beflexible and responsive. Whilerenewable shares are quickly growing across the EU, measures to provide thatflexibility havenot yet been equally planned for or implemented. Now is the time for all Member States togive strong policy signals and remove existing barriers to swiftly deploy cleanflexibilitysolutions alongside new and existing wind and solar capacity. The opportunity is particularly clear for pairing solar with battery storage, taking advantageof their mutually reinforcing business cases.Years of strong solar growth and high gas priceshave increased electricity price volatility across the EU, strengthening opportunities for batterystorage. In turn, batteries can increase power demand at peak solar times, supporting solarrevenues.If existing barriers to the deployment of battery storage are removed, countries canshift abundant and cheap solar power beyond sunny hours and reduce reliance on expensivefossil fuels. 01EU countries could save €9bn in gascosts by capturing excess wind andsolar By 2030, wind and solar power could exceed domestic demand by 183 TWhacross all EU countries, equivalent to the annual power consumption ofPoland. If EU countries were to deployflexibility solutions, such as batteriesand interconnectors, they could shift this excess clean power to replacefossil gas generation. Doing so would avoid gas purchase costs worth €9billion annually. 02Solar surpasses 80% of demand atpeak hours in nine countries Between August 2023 and July 2024, nine EU countries saw solar sharepeaking at or above 80% of their hourly power demand, including theNetherlands and Greece where solar generation at times surpassed 100%of demand. 03 Germany could have avoided up to€2.5mn fuel costs in June alone with2 GW additional battery storage If Germany had an additional 2 GW (+20%) of battery capacity in operationin June 2024, the ability to shift midday solar power to the evening couldhave displaced 36 GWh of fossil power. Depending on which fuel wasdisplaced, this would have avoided €1.3 million in hard coal costs or €2.5million in fossil gas costs. ”It just makes sense to capture all the low-cost renewable power we can. Assolar continues to soar, batteries will help ensure that abundant power can beused at all hours. While the EU’s renewables scale-up has been rapid andambitious, the same focus on cleanflexibility is still lacking. This needs to beaddressed, and quickly, for consumers and businesses to feel the benefits ofreducing fossil dependence.” Beatrice Petrovich Senior Energy and Climate Analyst,Ember Moreflexibility brings benefits Renewables are growing,flexibility must grow too Within the next six years, wind and solar generation will surpass EUdemand in certain hours of the year. Being able to shift that power towhere and when it can be used through cleanflexibility solutions is anenormous opportunity. Renewables and cleanflexibility are a perfectmatch As wind and solar grow rapidly in the EU,a swift scale-up of cleanflexibilitywill be needed toenable decarbonisation across the system. Flexibility can include any measures to