Each $1 of PV imported could displace ~$50 of fuel imports of its operating lifetime.

"A solar panel can pay back imported diesel within months. In Nigeria, a 420 Watt solar panel retails for around $60 USD ($0.14 USD/watt), and would produce 550 KWh in a year. At the current diesel price of $0.66 USD per litre, $60 USD of diesel would make only 275 KWh of electricity, implying a payback time of just six months."