Solar Energy Costs Dropping Dramatically

Solar energy costs continue to plunge across the world

Two stunning auction results in India and Chile in the last week have underscored the extraordinary gains that large-scale solar has made against its fossil fuel competitors.

In both countries, solar is now clearly the cheapest option compared to new coal-fired power stations. In Chile, where the auction was open to all technologies, fossil fuel projects did not win a single megawatt of capacity. And the auction produced the lowest ever price for unsubsidised solar – US6.5c/kWh.

In India, US firm SunEdison won the entire 500MW of solar capacity on auction in the state of Andhra Pradesh, quoting a record low tariff for India of INR 4.63/kWh (US7.1c/kWh). Again, this was unsubsidised. And again, it beats new coal generation, particularly generation using imported coal.

These bids follow an auction in the US last month by the Texas city of Austin, which contracted to build 300MW of large-scale solar PV at a price of less than US4c/kWh. Even after backing out a tax credit, this is still less than US6c/kWh, and still beats gas and new coal plants, if anyone was planning to build one.

As Greentech Media reported last month, and we have signalled in the past, that means utilities are choosing large-scale solar over new peaking gas plants. Solar PV is beating gas on fuel costs alone, and is acting as a safe hedge against fuel price volatility.

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