A municipal water treatment plant in central Tanzania is responsible for supplying drinking water to nearby urban and rural residents. The plant is located in a remote area with no public power grid coverage, relying entirely on diesel generators for power supply. High diesel fuel costs, frequent maintenance failures, and unstable power supply often lead to interrupted water treatment processes, resulting in insufficient drinking water supply and affecting residents’ daily life. The municipal government urgently needs a stable, clean, and cost-effective off-grid power supply solution to ensure the continuous operation of the water treatment plant.
Location/Time: Central Tanzania, February 2025
Configuration: PCS: 450kW, BAT: 1100kWh, PV: 380kW, Backup Diesel Generator: 280kW
Load: Water pumping systems, aeration equipment, water filtration machinery, disinfection systems, plant monitoring equipment, office and staff living electricity
Operating environment: Remote area, high temperature, strong sunshine, high humidity, large dust from surrounding construction
Operating modes: Off-grid operation, solar energy priority, energy storage system for peak load regulation, continuous power supply and emergency backup, diesel generator starts automatically in continuous rainy days or peak water supply periods to ensure uninterrupted water treatment and supply.
The system adopts a waterproof, dust-proof and corrosion-resistant integrated design, which can adapt to the high-humidity and dusty environment of the water treatment plant. It is equipped with an intelligent energy management platform that links with the plant’s water treatment control system, adjusting power supply according to water demand changes to optimize energy utilization. The system also has a fault self-diagnosis function, reducing maintenance workload and ensuring long-term stable operation.
Since the system was put into operation, the water treatment plant has achieved 24-hour continuous operation without interruptions caused by power outages. The annual diesel fuel cost has been reduced by 58%, and the maintenance cost has decreased by 65%. The stable power supply has ensured sufficient and safe drinking water supply for 50,000+ residents, improving the municipal public service capacity and winning wide recognition from the local government and residents.
