Solar Glossary

Embodied Carbon

Embodied carbon is the total CO₂ emitted during the manufacture, transport, installation, and eventual disposal of a solar panel system, before it generates any clean electricity.

Embodied Carbon explained

Embodied carbon refers to the greenhouse gas emissions associated with the full lifecycle of your solar system — from mining the raw materials (silicon, aluminium, silver) through manufacturing, shipping, installation, and eventually decommissioning and recycling.

For a typical monocrystalline solar panel, embodied carbon is approximately 20–50 gCO₂e per kWh of electricity generated over its lifetime. Compare this to:

  • UK grid electricity (2024): ~190 gCO₂e/kWh
  • Natural gas: ~490 gCO₂e/kWh
  • Coal: ~820 gCO₂e/kWh

This means solar electricity produces 4–10× fewer lifecycle emissions than grid electricity even accounting for manufacturing. The embodied carbon "debt" is typically repaid within 1–3 years of operation (the energy payback time).

Factors affecting embodied carbon:

  • Manufacturing location: panels made with coal-heavy electricity have higher embodied carbon than those made with renewables
  • Panel type: thin-film CdTe panels (e.g. First Solar) have among the lowest embodied carbon in the industry; standard monocrystalline panels are roughly in the middle
  • Transport distance: panels shipped from Asia have higher transport emissions than European-manufactured products

As the global electricity grid decarbonises, solar manufacturing emissions will fall further, improving the already excellent lifecycle carbon credentials of solar PV.

How this affects your solar decision

Understanding embodied carbon helps you make a fully informed environmental case for solar. Use the Solar Estimator to explore the carbon and financial benefits for your home.

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Related terms

Energy Payback TimeEnergy payback time is how long a solar panel takes to generate the same amount of energy that was used to manufacture, install, and eventually recycle it.Solar PVSolar PV (photovoltaic) is the technology that converts sunlight directly into electricity using semiconductor cells, and is what most people mean when they say "solar panels."Solar ThermalSolar thermal systems use sunlight to heat water for domestic use rather than generating electricity, and are a separate technology from solar PV panels.
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