Cheap electrons, contested supply

Solar generation is now the cheapest new electricity in most of the world, which settles the technology question. What remains contested is manufacturing: where panels are made, under what subsidies, and whether domestic production can survive without them.

Historically the industry went through repeated boom and bust cycles as capacity outran demand and prices collapsed. Several generations of manufacturers went bankrupt while deployment kept rising, which is a useful warning.

The structural driver is demand from data centres and electrification meeting policy that wants domestic manufacturing. Those two forces do not point the same direction on cost.

The technology layer spans polysilicon and wafer production, cell and module manufacture, next generation tandem and perovskite cells promising higher efficiency, trackers and inverters, and the recycling of panels reaching end of life.

Adoption economics differ sharply between deployment and manufacture. Deploying solar is economic almost everywhere; manufacturing it outside the dominant producer usually is not without support.

The beneficiaries include developers and independent power producers, inverter and tracker manufacturers, domestic module producers with subsidy support, and the balance of system suppliers.

The value chain runs from polysilicon through wafer, cell, and module to project development. Project development and the balance of system are where returns have been most durable.

The overlooked layer includes tracker and mounting system makers, inverter manufacturers, panel recycling firms, and the engineering contractors building at utility scale.

Competitive dynamics are dominated by manufacturing overcapacity, which has repeatedly destroyed module maker margins even while installations grew.

Risks: module oversupply crushes manufacturer economics, trade policy shifts abruptly, subsidy regimes are political, interconnection queues delay projects regardless of panel availability, and the sector has bankrupted many investors.

What to watch: module pricing, domestic manufacturing capacity utilisation, trade policy announcements, interconnection queue progress, and inverter shipment volumes.