By Emmanuel Addeh The nationâs electricity grid yesterday suffered another system collapse, throwing Nigerians into darkness and leaving businesses to hook on to alternative electricity sources. Nigeriaâs erratic power grid, along with the resulting precarious energy supply is a key issue hindering growth in the continentâs largest economy. However, the country has continued to implement tariff increases in state-controlled prices since 2015, which the government insists is needed to allow distribution companies to recoup costs and pay to generate companies. Operators have said that a âspinning reserve,â the amount of unused capacity in online energy assets which can compensate for power shortages or frequency drops within a given period of time holds the solution to the occasional collapses.