Green capitalism is an approach that attempts to use free-market mechanisms to mitigate anthropogenic climate change. Its advocates argue that the market supplies the best means to innovate technological solutions that can compete with existing polluting practices. Using a relational, post-anthropocentric and materialist ontology, this article analyses the micropolitics underpinning the capitalist market economy in terms of production and market assemblages and the affective forces within them. This novel approach reveals previously overlooked more-than-human affects within these capitalist assemblages. These affects generate the unintended and inevitable consequences of a capitalist economic framework: growth, waste and inequalities. Based on this micropolitical assessment, the article uses the example of the electric car to conclude that green capitalism is inadequate to address the climate crisis, and offers an alternative approach.