I thought the 300MW sounded too low so I checked the BP Statistical Review of World Energy June 2017
but they do not even bother to included most African countries.
I see they only have a few hydro stations. Do they buy any power from a neighbour? https://en.wikipedia.org/wiki/List_of_power_stations_in_Malawi
Foreign aid has been going to Africa for ~60 years - how come a country can be so lacking in 2018.
They have some coal but have been importing coal.