MaPrimeRenov is a grant made up of several parts - some funded by the government and managed by the organisation L’Anah, and some funded by fuel suppliers such as EDF - and it now replaces the Credit d’Impôts system for eco renovation reimbursement, which ended on 31 December 2020. It’s not actually a new thing; the government has simply opened the grant system (previously reserved for those with a very modest income) to everyone. They say it’s to boost the economy, improve the housing stock’s energy rating, and encourage the population to make changes to improve their energy consumption.