The transformation of the global energy system is under way, driven by the needs to address climate change and broaden access to affordable and secure energy, and enabled by cost-competitive renewable power and emerging innovative technical, policy and market solutions. Technology innovation has been and will continue to be a critical enabler of progress, but innovation priorities need to be refreshed to address the new challenges of integrating high shares of renewable power and electrifying the end-use sectors of transport, industry and buildings.