Solar will get too cheap to connect to the power grid

Solar economics & negative prices

• Surplus solar and wind can drive wholesale prices to zero or negative.
• Some argue this is “bad for everyone” because producers must recover costs at other times; others see it as a useful market signal.
• Negative prices are linked to inflexible thermal plants and policy designs like guaranteed feed‑in tariffs, not inherent to solar itself.
• Past policies (e.g., German EEG) are debated: credited with global PV cost declines and lower spot prices, but also described as costly for the host country.

Storage, flexible load & market responses

• Many expect negative prices to incentivize storage (home batteries, grid batteries, EVs) and flexible loads (HVAC, industrial heat, data centers).
• Examples: using batteries with dynamic tariffs, bulk resistive heat storage up to very high temperatures, ice or thermal storage for cooling, and demand-response programs.
• Some think we’ve moved from “build more solar” to “build more storage next to solar.”
• Idea of EVs and home batteries acting as virtual power plants is popular, though not yet mainstream.

Grid vs off‑grid and microgrids

• Question raised whether cheap solar + cheap batteries could make the traditional grid partially obsolete.
• Skeptics point to seasonal variation and high-latitude winters: diurnal storage is plausible, seasonal storage with current batteries is not.
• Microgrids and community solar are seen as complementary, not full replacements; cities will still need large shared infrastructure.

Land use & siting

• Concern over solar farms displacing agriculture, especially in SE England.
• Counters: solar land share could be under 1% nationally; agrivoltaics and grazing under panels can coexist with farming; offshore wind and rooftops reduce land pressure.
• Nuclear is far more land‑efficient but faces cost, planning, and political barriers.

Alternative sinks & fuels

• Ideas for soaking up surplus: hydrogen production, synthetic hydrocarbons via captured CO₂, desalination, sewage treatment, industrial furnaces, and compute workloads.
• Debate over hydrogen vs synthetic hydrocarbons: hydrogen is harder to store/transport but zero‑carbon; e‑fuels can use existing infrastructure but reintroduce combustion CO₂ unless feedstock carbon is captured.

Policy, subsidies & market design

• Large energy subsidies in Europe, especially during crises, raise questions about whether markets alone can handle volatility.
• Some see reserve payments for gas plants and connection fees as necessary reliability tools; others want faster phase‑out and better incentives for storage and demand response.

Nuclear, CCS & SAF

• Nuclear is portrayed by some as economically undermined by cheap daytime solar; others point to low‑carbon grids built with nuclear (e.g., France) as proof of concept.
• Carbon capture and storage is criticized as politically unattractive because it doesn’t reduce fossil extraction.
• Sustainable aviation fuel (SAF) exists at modest scale; producing it purely from electricity and air (via CO₂ capture) is seen as technically possible but currently uneconomic and policy‑dependent.

Bitcoin and speculative energy sinks

• Using excess energy for Bitcoin mining is raised and largely criticized as wasteful and socially harmful compared to productive uses like storage, hydrogen, or industrial processing.