science & techanalysisOur World in Data

China added an electricity grid the size of Germany's in a single year

the gist

China added a new electricity grid in one year that is roughly the size of Germany's entire system, a measure that gives a better sense of scale than counting gigawatts of solar farms or coal plants. Grids are the wires, transformers and substations that carry power from where it is made to where it is used. Building them lets solar and wind power reach cities and factories. China's expansion reflects both new renewable capacity and rising demand from homes, industry and electric vehicles.

how it works

Power plants produce electricity, but grids move it through high-voltage lines and transformers to users. Each new solar farm or wind park must be connected to the network before it helps. Without enough grid capacity, generation can be wasted or curtailed.

so what

Grid expansion is often the hidden bottleneck for clean energy, because power can only be used if it can be carried. China's scale of building shows how much infrastructure a fast energy transition requires.

Our World in Data · CC BY 4.0

Image: Our World in Data, CC BY 4.0