Falling Battery Storage Costs Are Quietly Reshaping Electricity Markets

January 23, 2026, Opinion: "Rising electricity prices will likely spur more people to embrace battery systems that store solar power, says research by Christian Kaps. Do governments still need to offer incentives? Sustainability and self-reliance motivated early adopters of solar energy and battery storage in Germany. Now, falling costs and rising electricity prices—could compel more people to pull back from the grid.

As solar panel and battery prices drop, research by Harvard Business School Assistant Professor Christian Kaps predicts some 54% of German households would benefit from using a solar-battery combination. The rise of self-generated electricity would have major implications for German utilities and the country’s power grid, which gets a substantial, yet decreasing share of energy from fossil fuels. Incentives and subsidies helped drive $807 billion in renewal energy investment globally in 2024 alone, as part of efforts to confront climate change. With electricity costs surging in many parts of the world, Germans stand to become producers and consumers of power in one of the most advanced clean-energy economies—even without such enticements."