Knowledge Hub

What we are learning about energy flexibility

Market shifts, operations and the engineering behind them, written by the people who run flexibility in 14 countries, with 9 TSO integrations.

Article · 4 November 2026

ACER gave energy traders a year to rebuild their reporting

ACER published the first set of Europe's revised REMIT reporting rules and fixed 29 October 2027 as the date they bind, Lithuania halved the performance guarantee a project posts to its grid operator and opened a year-long window to switch a permit between generation, storage and consumption, and sixteen Gelderland municipalities go on a connection waiting list from January. What each one changes for a flexible asset.

Article · 4 November 2026

Bulgaria's batteries passed 6 GW and started charging at night

Bulgaria's battery fleet reached 6.23 GW in late October, equal to 85% of national peak load, and has moved its charging into the night as the solar day shortens. Energinet put two curtailable connection products for Danish producers out to consultation, and four operating one-hour batteries in England changed hands on an augmentation case.

Article · 4 November 2026

Elexon asked seven aggregators to prove the flexibility they sold

Elexon has asked the seven independent aggregators trading flexibility in Britain's wholesale market for the evidence behind their baselines, and Ofgem set out what it wants those arrangements to deliver. In France, new rules on what a demand-response operator pays the supplier, and on how the reduction is measured, took effect on 1 November.

Article · 4 November 2026

Lithuania's balancing market outgrew its state battery

The Lithuanian regulator cut the balancing capacity bought from the state-owned Energy Cells battery to 20 MW from 1 November, because commercial storage now covers the need without it, and Britain's backstop for its last pre-2030 connection offers fell on 31 October.

Article · 4 November 2026

Spain would trade grid access for the right to switch loads off

Spain's draft royal decree reached the Council of State with grid access for data centres of 10 MW and above tied to hourly renewable cover, surcharges of up to 500% and an optional automatic power reduction signal, while Brussels asked whether the text needs EU notification. The Commission's 2027 work programme cut new initiatives to 23 and withdrew the energy taxation overhaul.

Article · 3 November 2026

France's subsidised wind and solar can now sell balancing services

A French decree in force since 29 October lets wind and solar farms on state support contracts sell network services and balancing energy, while Britain confirmed that chosen demand projects can jump the connection queue and Norway found data centres holding about half of its reserved grid capacity. Finland raised the price of being balanced and Sweden widened the zonal hedge in the same seven days.

Article · 3 November 2026

German battery spreads hit their widest since the 2022 energy crisis

A simulated German battery saw its widest day-ahead spread since the 2022 energy crisis in September, and wholesale trading out-earned the reserve stack. Three financings that closed in the same days, in Baden-Wurttemberg, Finland and South Yorkshire, each answered the same question differently: how much of a battery's income has to be contracted before a lender will fund the rest.

Article · 3 November 2026

Agora puts Germany's avoidable grid build-out at 66 billion euros

Agora costed the German distribution grid that would not have to be built if flexible demand were planned in, Ember measured how much relief a data centre can hand back, and a listed British battery fund put itself up for sale.

Article · 3 November 2026

Germany's first capacity auction went to gas, Belgium's to batteries

Germany's first StromVKG auction handed 15-year contracts to three gas plants, Belgium's capacity market filled up with four-hour batteries and selected no two-hour ones at all, and eight British developers put a 13% revenue hit on buying too much long duration. What discharge duration now decides.

Article · 3 November 2026

Italy approved 3.7 GW of batteries in October

Italy's ministry authorised 24 battery projects totalling 3.7 GW in October, Modo cut its forecast for the British fleet in 2029 to 17.7 GW as connection dates slipped, and two small projects in Spain and Germany found the counterparties they needed. What decides whether a storage project now gets built.

Article · 28 October 2026

Sold on completion, paid on access: 3 shifts in what a European battery is worth

Greenvolt sold two finished Polish batteries with 80 million euros of the price tied to balancing-market approval, Portugal made grid-forming and inertia mandatory for large plants, and Czechia pushed two capacity auctions into 2027. What each one changes for flexible assets now.

Article · 23 October 2026

Smaller cheques, a shorter leash, and a storage pioneer in insolvency

Italy cut the capacity credit of a four-hour battery from a single national 67% to as little as 21% by zone, Poland gave grid operators the right to switch batteries off for a day, and Sonnen filed for insolvency two months after Shell sold it.

Article · 22 October 2026

The regulator showed up, and battery capex stopped falling

Estonia fined a balancing bid that was priced so it would not be called, Wood Mackenzie logged the first rise in European battery installation costs in three years, and ACER set dates to consult on the model that will size EU flexibility needs. What flexible assets now cost to build, and what it costs to get the bidding rules wrong.

Article · 22 October 2026

Connect it, control it, or lose it: Europe's new flexibility rules

France made remote control a condition of public support for heat pumps and chargers, Poland more than doubled the battery a household may connect behind its solar system, and Spain rejected almost twice the renewable capacity that entered consultation. What these rules mean for a flexibility business case.

Article · 22 October 2026

The reserve premium is wearing off: how European flexibility gets paid now

September revenue data from the Baltics and the Nordics, a saturation warning out of France and a German filing deadline all point the same way: capacity reservation is thinning where batteries arrived first, and energy trading is taking over the stack.

Article · 7 October 2026

Paid on contract, or squeezed on spread: Europe battery market is on split

How a battery locks in revenue now decides whether it gets built: the largest EU tolling deal yet in Poland, Bulgaria testing merchant-only spreads at scale, and Spain's co-located hybrid contracts.

Article · 30 September 2026

Building fast, paid differently: signals from the Baltic and Nordic battery market

Developers pushed record volumes into construction across Poland, Lithuania and Estonia, while Baltic revenues per MW slipped again and Nordic grid operators rewrote the rules on frequency reserves.

Article · 23 September 2026

Earning with batteries in Europe

Battery revenue in Europe is still there, but the rules are tightening: index-linked swaps, grid access disputes, and new capacity markets in Spain and Italy.

Article · 16 September 2026

Flexibility, not megawatts: 3 shifts reshaping Europe's storage business case

Three stories from the week to 16 September 2026 point the same way. A veteran German solar-and-storage developer slid into insolvency even as Vattenfall, Masdar and others…

Article · 9 September 2026

Battery revenue swung south in July: signals reshaping the European storage business case

Europe keeps adding batteries at pace, with EUPD Research expecting European storage installations to grow about 78% in 2026, led by Germany, Bulgaria, Italy, the UK and Spain (…

Article · 2 September 2026

Baltic batteries just got a trading brain: 3 shifts in where European flexibility money is moving

Between 26 August and 2 September, one thread ran through the European flexibility news: value is moving from building megawatts to routing and controlling them. A Finnish…

Article · 26 August 2026

A virtual battery hit full power this week: 3 signals on where flexibility money is moving

Between 19 and 26 August 2026, the market kept paying for control rather than raw capacity. A virtual battery in Germany reached its full contracted power, a Swiss utility bought…

Article · 19 August 2026

Europe's biggest battery just switched on: 3 signals shaping storage revenue right now

The week of 12 to 19 August 2026 handed battery owners three things to weigh at once. Europe's largest battery went live and a fund bought a set of already-running ones, a solar…

Article · 12 August 2026

3 shifts in Europe's battery business case this week: proven revenue, a wider map, a shorter supplier list

The week of 5 to 12 August handed battery owners three things worth filing. Germany, Europe's largest storage market, showed the merchant business case works, then admitted…

Article · 11 August 2026

The rising cost of imbalance in European energy markets

Settlement periods are shrinking, renewables are harder to forecast, and cross-border platforms are exposing national markets to steeper price swings. Here is what is driving imbalance costs up, where it is sharpest, and what portfolio teams are doing about it.

Article · 5 August 2026

France switches on locational grid tariffs, Brussels backs storage, traders underwrite the fleet: 3 shifts in Europe's battery business case

The week of 29 July to 5 August made one thing plain: in Europe, what a battery earns is now set as much by rules and contracts as by the price spread. France switched on a grid…

Article · 29 July 2026

Battery Storage Markets This Week: Capacity Auctions, Grid Queues & M&A

Battery Storage Markets This Week: Capacity Auctions, Grid Queues & M&A Notes from the flexibility desk for 23 to 29 July 2026. Two capacity-market moves this week ran in…

Article · 27 July 2026

3 shifts reshaping where European battery revenue comes from

Three developments in the week of 16 to 23 July 2026 point the same way: a European flexibility market that's getting bigger, more volatile, and more contracted, all at once.…

Article · 20 May 2025

Estonia Just Fixed a Massive Roadblock for Batteries

Estonia has taken a major step toward fairer grid economics by removing double grid fees for batteries.

Article · 30 April 2025

Raido Seppam: The One Pain Point All EPCs Share

EPCs and asset owners are all hitting the same wall: too many assets, too much complexity. Fusebox EMS simplifies it all: saving money, boosting output, and turning storage into profit.

Article · 13 March 2025

AI in Energy Management: Hype or Gripe?

AI promises smarter energy management, but does it deliver real value or just buzz?

Article · 20 January 2025

Fusebox Secures €2.6 Million to Strengthen European Energy Market

Fusebox, an Estonian startup and the leading flexibility provider in the Baltic states, has secured €2.6 million in funding to accelerate its expansion across Europe.

Article · 14 January 2025

10 Years Strong: Driving Smarter Energy Solutions

As 2025 begins, we proudly celebrate a decade of innovation: Fusebox turns 10!

Article · 5 December 2024

Fusebox: Active Across 13 Markets and Growing Strong

Discover how Fusebox grew from its roots in demand response to become active in 13 markets, offering cutting-edge energy solutions. With insights from our founder, Tarvo Õng.

Article, case study · 30 October 2024

VPP Product Update: Introducing FCR-D Up and Down Capability for PV Assets

We're now offering FCR-D for PV panels in the Nordics, enabling direct market participation without extra batteries. Tested and ready for real-life use!

Article · 28 October 2024

VPP Product Update: 15-Minute Resolution Support for mFRR

Fusebox’s VPP now supports 15-minute bid resolutions for the MARI platform, enhancing Baltic flexibility with precise forecasting, bidding, and reporting for accurate market alignment.

Article · 8 October 2024

MARI Platform Goes Live in Estonia Tomorrow: What to Expect

Starting tomorrow, October 9, 2024, Estonia joins the MARI energy balancing platform, boosting grid stability and energy efficiency across Europe. Learn more about its impact!

Article · 7 October 2024

Inside Solar & Storage UK: Tackling Scalability and Turnkey Challenges

Our team attended the Solar & Storage UK trade show to explore the current state and future direction of the solar and storage sector in the UK and Europe—read our blog to learn more.

Article · 12 September 2024

I Sell VPP Software for a Living: These Are the Top 2 Problems Power Utilities Face

Power utilities face two major challenges: managing complex systems and accessing lucrative markets. Learn how smart solutions can turn chaos into opportunity

Article · 16 April 2024

Virtual Power Plants: What are they and why are they important?

What a virtual power plant is, how it works, which assets it can run, how it makes money, and what to look for when choosing VPP software.

Article · 1 April 2024

Fusebox's Groundbreaking Tech Is Disrupting the Energy Industry's Backstage

In a groundbreaking development that promises to redefine the energy landscape, Fusebox has introduced its latest innovation.

Article · 10 January 2024

The Essential Guide to Smart Batteries: 6 Insights for Battery Owners

Discover the essential insights about Smart Batteries in our guide, helping battery owners revolutionize energy management with six key revelations.

Article · 1 September 2023

Flexible energy use: powering a cleaner future

Reducing energy consumption is considered one of the best ways to mitigate climate change. But where reducing energy consumption is not possible, flexible energy use can be a powerful way to reduce CO2 emissions.

Article · 12 January 2023

6 examples of flexible energy consumption

Sooner or later you are bound to run into such hype words as demand response and flexible energy consumption. But what do these words mean and where does flexibility come from?

Article · 8 December 2022

Fusebox raised €2.5 mln to bring our energy flexibility software to Europe

The investments came from the Dutch energy giant Eneco and the largest Polish bank PKO.

Article · 6 January 2022

Four key trends accelerating demand response adoption

In the renewable energy sector, four main trends will give us momentum this year.

Article · 28 October 2021

Fusebox won the Siemens Future Buildings Hackathon at World Expo

Out of hundreds of competitors Siemens selected Fusebox's solution of easily connecting demand response to different electrical assets.

Article · 3 September 2021

EV charging stations to be tested for the first time for balancing the electricity system

Ignitis, Litgrid and Fusebox have launched a pilot project in Lithuania to investigate how EV charges can help balance the grid.

Article · 12 July 2021

Fusebox raised 1.3 million euros

The raised money will go towards growing the team and expanding to new markets.

Article · 8 July 2021

Fusebox among 41 suppliers to be selected by AI4Cities

Fusebox takes up the challenge of creating an AI for cities to accelerate their transition towards carbon neutrality.

Article · 15 June 2021

FuseBox and Pixii joined forces to develop a unique energy storage system

Combining Pixii batteries with Fusebox's smart software allows for real-time communication between the energy market, client and the storage system.