On mains electricity in Nigeria. The people on Band A - i.e. the people the discos are depending the most on for increased revenues, are also the most likely to afford the upfront costs for solar + inverter. Based on advances in solar plus inverter tech, I think that ship has already sailed. In the next ten years, I think hooking up to the national grid, would merely be optional.
I didn't have mains electricity since Saturday - was restored only last night. I have a solar + inverter set up, so do all my neighbours. There are all sorts of devices coming to the market, targeted for lower paying consumers - solar + inverter fan, pay small small solar etc. One thing we have in abundance here is energy; Sunlight, Natural Gas, Petroleum - but with petrol prices at ₦ 1,400 per liter, and erratic mains electricity supply, solar + inverter is a given - and trust me, the Chinese will deliver.
At the end of the day, NITEL could only deliver 300,000 landlines - it couldn't establish the basic infrastructure for xDSL to take off in Nigeria. Even when the successors of NITEL were given billions and a free GSM license - they couldn't hack it.
Something similar is bound to happen to residential electricity - nobody has the competence to deliver 24 hours electricity in Nigeria (to more than an estate or an estate sized location) - and simply telling consumers to "pay more for better/24 hours stable electricity in Nigeria" will not work, because;
1. Nobody in Nigeria believes that is possible.
2. Nigerians simply do not have the money to "pay more".
3. Most importantly, there are alternatives - and in a decade's time, the alternatives will be a lot cheaper and a lot more efficient.