AUSTIN, Texas — Tesla has landed one of its largest European energy contracts to date, agreeing with independent power producer NatPower to deploy 25 gigawatt-hours of Megapack battery storage across Italy and the United Kingdom. The pact, announced Tuesday, is the first phase of a program the two companies value at up to $5 billion.
Under the multiyear agreement, NatPower will install Tesla Megapack systems at five initial project sites and run them with Tesla's energy-trading software, which decides when to charge and discharge the batteries to capture price swings on the grid. The first phase alone carries a construction cost of $4 billion to $5 billion, and the broader program is targeted to exceed 100 GWh of capacity over time, with revenue NatPower says could top $15 billion across 20 years.
A $5 Billion Bet on Europe's Grid
The 25 GWh first phase is enormous on its own. For perspective, it is more than half of everything Tesla deployed worldwide in all of 2025. The deal extends Tesla's reach deeper into a European storage market that is expanding quickly as Italy and the UK lean on batteries to balance growing fleets of wind and solar that generate power when the weather allows rather than when the grid needs it.
The momentum builds on a remarkable run for Tesla's energy division, which has quietly become the company's fastest-growing line of business even as rivals questioned its valuation. That strength has also fed the balance-sheet debate explored in our coverage of Tesla's cash position and credit rating.
Software Is the Real Moat
What makes the NatPower deal stand out is not just the steel boxes full of cells. Tesla is embedding its trading and dispatch platform into each project, turning the batteries into revenue-generating assets rather than passive backup capacity. That combination of hardware and software is stickier and higher-margin than selling Megapacks alone.
"What we have built with Tesla is an ecosystem that enables alignment between capital and execution, and that can be replicated across multiple markets," said NatPower CEO Fabrizio Zago. As detailed by Electrek's report on the agreement, the framework is designed to scale across additional European countries.
Energy Keeps Carrying the Story
Tesla deployed a record 46.7 GWh of storage in 2025, up roughly 48% year over year, and analysts pegged first-quarter 2026 deployments near a record 14.4 GWh. The product roadmap is moving just as fast, with pre-integrated Megablock and Megapack 3 systems engineered to cut installation time and speed up deployment. That same ambition runs through Tesla's wider AI and infrastructure push, including the modular data-center concept covered in our look at the company's MEGAPOD trademark filing.
For Tesla, the NatPower agreement is a marker of where the company is heading: less dependent on quarterly car deliveries and increasingly defined by energy, software, and recurring revenue. If the first five projects break ground on schedule, the path past 100 GWh would make NatPower one of Tesla's most significant storage customers anywhere in the world, and another sign that the energy business may end up justifying the entire company.
