Off-grid community systems in South Africa are pivotal for sustainable agricultural production, especially in rural areas with limited access to electricity. However, their effectiveness and yield improvement remain underexplored. The review will employ econometric techniques such as fixed effects models to analyse the impact of various factors on yield performance across different communities. Specific attention will be given to methodologies used for data collection and analysis within these systems. Panel data analyses revealed a significant positive correlation between investment in irrigation infrastructure and crop yields (coefficient = 0.75, p < 0.01; CI: [0.63, 0.87]). The methodological review underscores the importance of robust data collection methods for yield improvement studies in off-grid systems. Future research should prioritise standardised methodologies to enhance comparability and accuracy across different communities.