Medupi's last unit produces first power

First synchronisation or first power is when the generator in the unit is, for the first time, electrically connected to the national power grid so that it is aligned with all other generators on the grid. It will then start to generate and deliver electricity into the grid over several months. During this testing and optimisation phase, Unit 1 will be delivering power intermittently; and will ensure the country has stable electricity supply.

The next step will be the testing and optimisation of the Unit which then results in it being able to generate full power of 800MW of electricity whilst completing the construction and commissioning of dust handling plant. Interestingly, all electricity that is generated is fed into the national grid for the country’s consumption. Once Unit 1 has attained full power, it will be a step closer to reach commercial operational which occurs within six to nine months after first synchronisation.

Eskom is developing Medupi, and its sister plant, Kusile, to supplement the country's ageing power infrastructue, but both are years behind schedule and tens of billions of rand over budget.