Green Energy Investments: Clean Tech in 2026

Global investment in the energy transition crossed $1.7 trillion in 2023, according to the International Energy Agency's annual World Energy Investment report, with spending on solar photovoltaics alone overtaking spending on upstream oil and gas for the first time. For 2024 and 2025, BloombergNEF and the IEA have flagged a continued shift in the mix: capital is moving away from headline-grabbing project announcements and toward the grid, storage, and supply chain pieces that determine whether the projects actually run.

For an investor, that shift in the underlying spending pattern is more useful than any sector index. The companies positioned to benefit are not necessarily the ones with "clean" in the name. Transmission, transformers, mid-stream metals, and software for grid balancing have all become parts of the trade, and many of them sit inside utilities, industrials and materials, not inside a thematic ETF.

Where the policy floor sits

The US Inflation Reduction Act of 2022 created production and investment tax credits for clean electricity, hydrogen, advanced manufacturing and several other categories, with most credits running into the 2030s. The Internal Revenue Service has continued to release implementing guidance, and the Congressional Budget Office's revised cost estimates put the gross fiscal cost of the energy provisions in the hundreds of billions of dollars over a decade. In Canada, the federal government's Clean Economy investment tax credits, including credits for clean technology and clean hydrogen, were enacted in stages through Budget 2023 and Budget 2024 and are administered by the Canada Revenue Agency.

The policy support matters because it sets a floor under project economics, not because it guarantees a stock will rise. Investors learned that lesson the hard way in 2023, when the iShares Global Clean Energy ETF (ICLN) fell more than 20% even as installation volumes hit records. Higher interest rates, supply-chain costs and the way many clean energy revenues are tied to long-dated contracts hurt valuations regardless of policy signals.

The grid is the bottleneck

Industry groups and operators on both sides of the border have flagged interconnection queues and transmission build-out as the main constraint on new renewables. The North American Electric Reliability Corporation's long-term reliability assessments and ISO/RTO interconnection reports show queues stretching into the late 2020s in much of the US. Companies building high-voltage equipment, conductors and grid-scale battery systems are responding to a demand backlog that does not depend on next quarter's commodity print.

Storage is the other piece. The IEA's Renewables 2024 report projects battery storage additions outrunning earlier forecasts, with utility-scale lithium-ion systems dominating the pipeline. The economics work because storage smooths out the intermittency of solar and wind, which in turn lets developers sign firmer offtake contracts. That feedback loop, more than any single technology breakthrough, is what makes the grid build-out a multi-year capital cycle rather than a one-off.

“The energy transition is no longer mainly about adding generation. It is about being able to move and store what we already build.”

Risks the brochure leaves out

Concentration in critical minerals is the cleanest example. The IEA's Critical Minerals Market Review has flagged that processing capacity for lithium, cobalt and rare earths remains heavily concentrated in a small number of jurisdictions, which translates into price volatility and geopolitical risk for downstream manufacturers. Project delays, permitting fights and changes in tax-credit interpretation can all reset valuations quickly, as the past two years have shown.

For most retail investors, a diversified, low-cost approach to the theme, whether through a broad ETF or through exposure inside a total-market fund, is the simpler default. Concentrated bets on a single technology or single company in this sector have a wider distribution of outcomes than a sector-fund chart suggests. This piece is general reporting based on publicly available data; nothing in it should be read as a recommendation to buy or sell a specific security.