BloombergNEF Ups BESS Forecast as Renewables Add Resilience From Fossil Fuel Price Shocks

Why It Matters

The widened investment gap underscores the urgency for policymakers and capital markets to accelerate low‑carbon financing, while data‑centre growth threatens to erode emissions gains unless paired with storage and renewable upgrades.

Key Takeaways

• BNEF lifts battery storage outlook to 3.8 TW by 2050.
• Data centres could boost power‑sector emissions 6% by 2035.
• Global energy‑transition investment needs $4.8 trillion annually to meet net‑zero.
• Solar PV expected to become top generation source by 2032.
• US policy may curb cheap battery imports, slowing deployment.

Pulse Analysis

BloombergNEF’s 2026 New Energy Outlook revisits its Economic Transition Scenario, incorporating the latest geopolitical shocks—from the Persian Gulf conflict to lingering supply‑chain disruptions—and underscores how these events sharpen the case for resilient, low‑carbon power systems. The firm’s analysis shows that $2.3 trillion poured into clean‑energy technologies in 2025 aligns with its baseline forecasts, yet the Net‑Zero pathway still demands nearly double that amount each year through 2030. This investment shortfall highlights a financing bottleneck that could stall the decarbonisation of heavy industry, transport, and grid infrastructure.

A standout revision in the report is the aggressive battery‑storage outlook: BNEF now expects global BESS capacity to climb from 223 GW in 2025 to 3.8 TW by 2050, driven by falling lithium‑ion costs and the need to smooth solar‑induced duck‑curves. However, policy headwinds in the United States—such as the One, Big, Beautiful Bill Act limiting foreign‑entity battery imports—could temper deployment rates, while China’s pivot toward pumped‑hydro and other flexibility resources may slow its own battery growth. Long‑duration storage remains under‑penetrated, leaving a gap in grid‑scale firm capacity that could become critical as variable renewables dominate.

The rapid expansion of data centres adds a new dimension to the emissions equation. Forecasts indicate that data‑centre electricity demand will triple by 2035, potentially accounting for up to 23 % of regional load in markets like PJM. If powered largely by fossil generators, this could raise global power‑sector emissions by 6 % despite broader decarbonisation trends. Utilities therefore face a dual challenge: scaling up solar and utility‑scale storage to meet the surge while integrating cleaner generation for data‑centre loads. The report’s scenario modeling suggests that meeting these needs will require coordinated investment, policy support, and innovative storage solutions to keep the power sector on track toward its 2050 climate goals.