解法
In 1991 Hans-Josef Fell, a self-described 'solar freak' in a small town in northern Bavaria, paid about $70,000 in today's money for the solar panels that run his whole home — a price most Germans could not afford, on an investment most saw as financially hopeless. As a Green member of Germany's national parliament, he later helped create the policy that changed that.
The law allowed Germans to sell the renewable energy they generated to the grid at a high fixed price — one that more than covered the cost of installing a solar panel or investing in a wind turbine — with Germany paying for it through a surcharge on every electricity consumer's bill.
It succeeded beyond Fell's wildest dreams: demand for renewables grew so much in Germany that other countries, including China, started to mass-produce solar panels and wind turbines, driving prices down so people all over the world can afford the technology. The documented flip side: amendments and technology improvements pushed the surcharge up until Germany had Europe's highest electric bills, and electricity became a burdensome expense for some households on welfare.
What it achieved
Guarantee a fixed, above-market price for anyone feeding renewable power into the grid, funded by a small surcharge on every bill.
为什么有效
It solved the adoption problem with a pricing structure, not a technology push: make the grid a guaranteed buyer at a guaranteed price.
One national market's demand industrialised global supply chains, so the whole world inherited cheap panels — a spillover few policies achieve.
The design's failure mode is documented as clearly as its success: socialising the cost through bills became politically painful.
可以借鉴什么
A price guarantee can do what per-unit subsidies cannot: manufacture a market whose scale drives the technology's cost down for everyone.
后续
By the joint Vox/NPR reporting in 2020, the surcharge had skyrocketed: Germans paid the highest electric bills in Europe, with some welfare households spending a lot of time in the dark.
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