A 69-year-old from Glasgow invested in renewable home energy including solar panels, a battery, and a heat pump roughly a decade ago, expecting to reduce both costs and environmental impact. However, rising electricity prices in recent years made operating the heat pump uneconomical compared to his gas boiler backup, prompting him to switch back to gas heating.
Gavin’s situation reflects broader concerns about the UK’s energy transition strategy. A survey of heat pump owners found two-thirds reported higher heating costs after installation. Critics argue the government has emphasized cleaning up electricity generation—which accounts for roughly 10% of UK emissions—while neglecting heating and transport, which together comprise over 40% of emissions. This focus, they contend, drives up electricity prices and discourages switching from gas boilers and petrol vehicles.
The core economic challenge extends beyond generation costs. Sir Dieter Helm, a professor of economic policy at Oxford University, explains that while renewable electricity generation itself can be inexpensive, the broader system required to deliver it carries substantial expenses. Renewable sources like wind and solar need backup capacity for periods of low production, requiring system capacity to roughly double from historical levels—from around 60 gigawatts to potentially 120 gigawatts. Grid expansion, including new transmission lines and pylons, further increases costs.
Additional expenses include balancing costs—payments to wind farms to reduce output when the grid cannot absorb generated electricity—and network charges for infrastructure upgrades. The UK’s reliance on offshore wind, a more expensive renewable resource compared to solar in other regions, compounds costs. Material price increases and higher interest rates have further elevated expenses.
Government officials maintain that prioritizing renewables will ultimately enhance energy security by reducing dependence on imported gas, lower emissions, and cut bills. However, the timing of those benefits and the immediate cost burden on households remain points of contention as energy prices face upward pressure from geopolitical tensions.
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