Solar power is becoming bigger than nuclear

Original Article ↗ Hacker News Discussion ↗

Solar power has now overtaken nuclear in global electricity generation, driven largely by rapidly falling panel and battery costs and massive utility-scale deployments, especially in China and other emerging markets. Commenters contrast this with the high, often opaque costs of residential solar in places like the US, pointing to permitting, grid-connection rules, labor, financing schemes, and policy choices as major barriers. Much of the conversation focuses on what is still missing for a fully decarbonized grid—cheap, scalable storage, better transmission, and a realistic role for nuclear—while noting that distributed solar is already reshaping energy access in both rich and poor countries.

Residential vs utility-scale solar costs

  • Many commenters note a huge gap between residential ($3–4/W in the US) and utility-scale ($1/W or less) solar.
  • In the US, typical quoted home systems are ~$20–30k, which often doesn’t pencil out quickly where electricity is cheap.
  • In Australia and parts of Europe, comparable home systems cost 3–4× less; small plug-in kits can be a few hundred euros.

Soft costs, regulation, and business models

  • Hardware (panels, inverters, even batteries) is now relatively cheap; most cost is “soft”: sales, permitting, inspection, custom racking, code compliance, and financing margins.
  • Some argue US installers behave like financing scams, pushing long-term loans and capturing high markups on simple installs.
  • Others point out that as long as demand is strong and crews are scarce, high prices can persist.
  • Regulations and utility interconnection requirements vary widely and can force homeowners to use “blessed” installers.

DIY, balcony, and off-grid solar

  • DIY buyers report panel costs around $0.25–$0.30/W and whole off-grid systems with batteries for under $20k.
  • “Balcony solar” in Europe (self-install microinverters plugged into a socket) is growing; in the US it awaits standards (e.g., UL 3700) and regulatory acceptance.
  • In many developing countries, unregistered home and business solar plus batteries or small generators provide resilience where grids are weak.

Storage and grid integration

  • Diurnal storage (hours) with LiFePO₄ and upcoming sodium-ion batteries is seen as “mostly solved” and rapidly scaling.
  • Longer-duration storage (days–weeks/seasonal) is debated: options include flow batteries, thermal storage, pumped hydro, gravity systems, and synthetic fuels; none dominate yet and economics are uncertain.
  • Several note that much fossil generation can initially be displaced without huge storage if solar/wind just remove daytime fossil use.

Nuclear vs solar

  • Strong disagreement: some see nuclear as unmatched for dispatchable, low-carbon baseload; others say it is ruinously expensive, slow to build, and plagued by project risk.
  • Several argue nuclear’s main problem is cost, not safety; even with perfect safety it can’t beat cheap solar+storage.
  • Others counter that abandoning nuclear accelerated gas/coal growth and that some countries still pursue new reactors.

Politics, grid, and system design

  • US policy is portrayed as heavily influenced by fossil and domestic-industry lobbying, slowing imports of cheap Chinese solar/batteries and offshore wind.
  • Some emphasize grid needs beyond cheap kWh: inertia, fault current, and transmission (HVDC build-out, synchronous machines, flywheels).
  • Broad consensus: future systems will mix solar, wind, storage, some dispatchable thermal (gas/e-fuels), and possibly nuclear; rooftop solar is valuable for resilience but not the sole national strategy.