"Boost by EDF" Prize... Boost by EDF" -a promise for a future collaboration... Coldhubs, NIGERIA-, a young Nigerian start-up, offers 100 % solar-powered cold rooms used by famers and retailers... To guarantee the whole Ghanaian population an access to a reliable and clean source of energy: here was the huge challenge launched by the three EDF Pulse Africa Tour candidates in Ghana, Northlite Solar Limited, Ray Solar Power Africa and Sustainable Energy Technologies.