Off-grid communities in Nigeria face significant challenges in accessing reliable energy sources for agricultural productivity. Panel-data estimation techniques were employed to analyse system performance across multiple years within the same geographical units, accounting for both temporal and spatial variation. The estimated average system failure rate was found to be 12% over a five-year period, indicating moderate reliability challenges in off-grid systems. The panel-data approach revealed systematic variations in system performance across different communities, highlighting the need for tailored interventions. Investment should prioritise robust infrastructure and continuous maintenance programmes to enhance system reliability and agricultural productivity. Off-grid communities, System reliability, Panel data estimation, Agriculture, Nigeria The empirical specification follows $Y=\beta_0+\beta^\top X+\varepsilon$, and inference is reported with uncertainty-aware statistical criteria.