Tesla and NatPower Sign $5 Billion Megapack Agreement for 25 GWh of Battery Storage Across Europe
5 min read read
Tesla's Energy division scored its largest European contract on June 23, 2026, when independent energy developer NatPower signed a multi-year supply and execution agreement for more than 25 gigawatt-hours of Megapack battery storage systems across Italy and the United Kingdom. The Phase 1 program spans five projects in two countries, with a construction value estimated at $4–5 billion and projected revenues of more than $15 billion over 20 years.
At 25 GWh, the initial tranche alone represents more than half of Tesla's entire 2025 global energy storage deployments — which totaled 46.7 GWh for the full year. The deal was announced the same week Tesla hosted European utility customers in Munich for the Megablock product reveal at ees Europe, signaling an accelerating push into the continent's grid-scale storage market.
What the Deal Covers
Tesla will supply its flagship Megapack battery systems alongside engineering, procurement, and construction services. Beyond hardware, the agreement also includes integration of Tesla's Autobidder trading platform, which enables the storage assets to participate in electricity market arbitrage and ancillary services — generating recurring revenue well beyond the initial construction phase.
NatPower CEO Fabrizio Zago framed the partnership as a structural fix for a chronic industry problem:
“The sector has access to technology and capital but still struggles to deliver infrastructure consistently and within the required timelines.”
By bundling hardware, EPC services, and revenue-generating software under one agreement, Tesla and NatPower are targeting exactly that delivery bottleneck.
Scale and Strategic Context
| Metric | Value |
|---|---|
| Phase 1 capacity | 25+ GWh |
| Phase 1 projects | 5 (Italy + UK) |
| Phase 1 construction value | $4–5 billion |
| Total program target | 100+ GWh |
| Projected 20-year revenue | $15 billion+ |
| Tesla Lathrop annual capacity | ~40 GWh |
| Phase 1 as % of Lathrop output | ~62.5% |
The total program across both countries targets more than 100 GWh of storage capacity — a scope that would require roughly 2.5 years of Tesla's entire Lathrop, California Megapack factory running at full output to fulfill if executed in sequence.
Why Italy and the UK
Both markets are under significant grid investment pressure. The UK's electricity system operator has set ambitious capacity market targets to replace retiring gas peakers, while Italy is grappling with intermittent renewables integration as it pushes toward its 2030 clean energy commitments. Both countries have regulatory frameworks that compensate grid-scale storage through frequency response and capacity payments — exactly the revenue streams Autobidder is designed to capture.
NatPower is an independent power producer with development pipelines in Europe, the Americas, and Asia-Pacific, making the 100 GWh total program plausible as a multi-market expansion play rather than a single-country bet.
Megapack 3 and the Margin Question
The deal arrives at a complex moment for Tesla Energy. The division posted record deployments in Q1 2026 — approximately 14.4 GWh — but faces mounting margin pressure from Chinese manufacturers like CATL and BYD offering competing utility-scale storage at lower prices. The NatPower agreement, which bundles software and services alongside hardware, represents Tesla's clearest public demonstration of a differentiated value proposition: not just cells and steel, but a full-stack platform with bankable revenue warranties.
Megapack 3, currently in the production ramp at Lathrop, delivers 5 MWh per unit — a 28% increase in energy density over Megapack 2 with no change in physical footprint. Tesla's new Houston Megafactory, targeting a 50 GWh annual capacity, is expected to come online in late 2026 and would provide significantly more headroom to fulfill large European orders.
The Bottom Line for Tesla Owners
The NatPower deal matters beyond the energy division's balance sheet. Tesla Energy's margins directly subsidize the vehicle business — and every large-scale deal that demonstrates the Autobidder platform's commercial value adds to the case that Tesla is a vertically integrated grid-software company, not just an EV maker with battery packs on the side. As Q2 2026 results approach, watch Energy revenue as a swing factor in whether Tesla can sustain the profitability it reported in Q1.
Photo: Tesla energy storage facility / Pexels