Tesla's energy storage business just landed its largest reported European deal to date. The company has signed an agreement with independent energy firm NatPower to supply more than 25 GWh of Megapack battery storage systems across Italy and the United Kingdom, in a deal valued at up to $5 billion. The order dwarfs most single-customer contracts in the grid-scale storage market and signals that Tesla Energy is operating at a scale few competitors can match.
The Scale of This Order
To put 25 GWh in context: Tesla's Megapack factory in Lathrop, California has an annual production capacity of 40 GWh. This single NatPower order accounts for 62.5% of that entire yearly output. Fulfilling it will require sustained, prioritized production runs — and likely reinforces why Tesla has been steadily expanding Megapack manufacturing capacity over the past two years.
The deal is structured as the initial phase of a much larger program. According to reporting on the agreement, the full project targets more than 100 GWh of storage capacity across both markets, with the companies projecting that the complete program could generate over $15 billion in revenue across a 20-year operating period. Five initial battery storage projects are planned under this first deployment phase.
What NatPower Gets — and Why Tesla
NatPower isn't just buying hardware. The agreement includes Tesla's energy trading and optimization software alongside the Megapack units themselves — a bundled approach that turns a hardware sale into an ongoing services relationship. NatPower CEO Fabrizio Zago described the partnership as creating 'an ecosystem that aligns capital and execution' that can be replicated across multiple markets, suggesting Italy and the UK are a template, not a ceiling.
That framing matters. Grid-scale battery storage is increasingly competitive, with multiple manufacturers vying for large European contracts. Tesla's edge here appears to be the combination of proven hardware at scale, integrated software for energy optimization, and the manufacturing capacity to actually deliver 25 GWh without years of delay. For a developer like NatPower, execution certainty is arguably as valuable as unit economics.
Key Figures
| Metric | Value |
|---|---|
| Initial phase capacity | 25 GWh |
| Deal value (initial phase) | Up to $5 billion |
| Full program capacity target | 100+ GWh |
| Projected 20-year revenue | $15+ billion |
| Lathrop factory annual capacity | 40 GWh |
| This order as % of annual capacity | 62.5% |
| Deployment markets | Italy, United Kingdom |
| Initial projects planned | 5 |
What It Means for Tesla Energy's Trajectory
Tesla's automotive business gets most of the attention, but the Energy division has been quietly building toward exactly this kind of deal. Megapack deployments have grown substantially year over year, and a contract of this magnitude — spanning two major European markets with a pathway to 100 GWh — validates the bet Tesla made in scaling Lathrop well beyond what its early utility customers required.
The European grid storage market is under significant pressure to expand as both Italy and the UK accelerate renewable energy buildouts. Battery storage is the critical infrastructure piece that makes intermittent wind and solar reliable at scale. Landing NatPower as a multi-decade partner positions Tesla not just as a supplier, but as foundational infrastructure for two of Europe's largest energy transitions. Whether the full 100 GWh program materializes on schedule will be the real test — but the initial 25 GWh commitment alone is a landmark number for any single Megapack customer.
Sarah focuses on Tesla Energy, SpaceX missions, and the broader Musk AI portfolio. Former data analyst in clean energy. Based in San Francisco.
Sources verified at publish time. Spotted an inaccuracy? Email editorial@basenor.com.
