Rural electrification remains a persistent challenge across sub-Saharan Africa, where extending central power grids to remote communities is economically prohibitive and technically complex. A research team evaluated hybrid renewable energy systems as a decentralized alternative for powering rural areas in Auchi, Nigeria, where daily electricity demand reaches 2,255 kilowatt-hours with a peak load of 214 kilowatts.
Using HOMER Pro optimization software, engineers modeled three fully renewable configurations: a combined solar-wind-battery system, a solar-battery system, and a wind-battery system. All were evaluated under identical environmental and economic conditions to determine which delivered the best balance of cost, reliability, and environmental performance.
The hybrid solar-wind-battery configuration emerged as the superior solution. The system combines 1,177 kilowatts of photovoltaic capacity with two wind turbines, 1,033 battery units, and a 198-kilowatt converter. This setup delivers electricity at $0.085 per kilowatt-hour while maintaining 100 percent renewable generation and zero carbon emissions. The Net Present Cost over the system's lifetime reaches approximately $904,000, with initial capital investment of $503,000.
The optimized system achieves exceptional reliability, meeting 99.93 percent of load demand with only 0.07 percent unmet energy. Excess renewable generation totals 57.5 percent, which operators could allocate to future load growth or adjacent communities. Sensitivity analysis identified solar irradiation and discount rates as the primary economic drivers, indicating that improved photovoltaic efficiency and favorable financing would further reduce costs.
These findings demonstrate that autonomous hybrid renewable systems provide a viable alternative to diesel generators and costly grid extension. For Nigeria and similar African nations with abundant solar and wind resources, such decentralized approaches can accelerate rural electrification while supporting climate objectives and energy independence.
