This project implemented a simple and efficient off-grid solar water pumping system in a rural Tanzanian community during 2025.

1. System Configuration:

The core system was designed for reliability and ease of setup, consisting of:

• Solar Array: A 4 kW photovoltaic system comprised of 16 panels, each rated at 250 watts.

• Water Pump: A single-phase submersible pump with a power rating of 2.2 kW and an operating voltage of 220VAC.

• Solar Inverter: A dedicated solar pump inverter (model: SP1002) with a 12.2 kW capacity, converting DC power from the panels to AC for the pump. This unit featured Maximum Power Point Tracking (MPPT) technology for optimized energy harvest and provided essential protections against issues like dry-running or motor overcurrent.

2. Impact and Advantages:

The installation provided a consistent and sustainable water source, likely for community use, irrigation, or livestock. Key benefits included:

• Energy Independence & Cost Savings: The system eliminated reliance on expensive and polluting diesel generators or the unreliable grid, leading to zero fuel costs and low maintenance.

• Simplicity and Reliability: The design prioritized straightforward installation and robust operation, suitable for remote areas with limited technical expertise.

• Environmental Sustainability:  The solution provided clean water using renewable energy, reducing carbon emissions and environmental impact.

This case demonstrates how a well-sized solar pumping system can offer a practical and sustainable solution for water access challenges in off-grid regions of Tanzania.