Region: Sub-Saharan Africa
Local Application Sector: Agricultural Irrigation (PV Pumping Systems)
Associated Inverter Model: SD600 Series (0.3–400 kW)
Project Scale: Covers multiple farm clusters, comprising dozens of PV pumping systems.
Project Background
Sub-Saharan Africa boasts excellent solar resources; however, vast tracts of farmland are situated far from the power grid. These areas have long relied on diesel-powered generator sets for water pumping, facing persistent challenges such as unstable fuel supplies, high operating costs, and difficult maintenance. Local power supply is predominantly three-phase 380V or single-phase 220V. Furthermore, the outdoor environment—characterized by high temperatures, dust, and heavy rainfall—imposes stringent requirements on the environmental durability of the inverters.
Customer Pain Points
High costs and instability associated with diesel transportation; frequent maintenance requirements and high failure rates for generator sets; continuous exhaust emissions and noise pollution generated during operation; and a lack of intelligent protection features in traditional systems—which previously led to pump damage caused by dry-running (due to water source depletion), resulting in significant economic losses.
Customized Local Solution
Optimized MPPT algorithm parameters tailored to local solar irradiance levels and well depths, ensuring high-efficiency output across the entire range of solar radiation;
Incorporation of an IP65 high-protection rating and a wide-temperature-range thermal design, providing robust resistance against sand, dust, torrential rain, and high temperatures;
Built-in dry-running protection for the water pump: the system automatically enters sleep mode when the water source is depleted and automatically restarts once the water source is restored;
Integrated GPRS remote communication capability, supporting real-time monitoring of operational status and power generation output via a dedicated mobile application.
Product Performance
The SD600 series supports dual AC/DC power input, allowing for seamless switching to grid power during periods of insufficient solar irradiance; its MPPT tracking efficiency reaches 99%, thereby maximizing the utilization of solar energy; the series is capable of driving a wide variety of pump motors—including synchronous, asynchronous, single-phase, and reluctance motors—offering flexible compatibility with diverse local water pumping equipment.
Project Operational Results
Zero Energy Costs: By replacing diesel power with photovoltaics, annual fuel expenditures are reduced by thousands of dollars, resulting in a payback period of approximately two years.
Drastically Reduced Failure Rate: The annual failure rate has dropped to below 5%; remote diagnostics cover the majority of software-related issues, leading to a sharp decline in the frequency of on-site maintenance visits.
Doubled Pump Lifespan: Dry-run protection completely eliminates pump damage incidents, extending the service life of the pumps to more than double that of the original solution.
