Expression of Interest For Design, Supply And Install A Hybrid Solar For Livestock Farmers

Expression of Interest for Design, Supply and Install a Hybrid Solar for Livestock Farmers. Location: Kigali Deadline: Friday, 11/09/2026 17:00 a) Background information. Kilimo Trust Rwanda (KTR) is Non-Governmental Organization (NGO) working on agriculture and agribusiness that specializes in the design and implementation of sustainable agribusiness solutions in Rwanda and across East Africa. Kilimo Trust has worked collaboratively with agricultural value chain actors to co-develop interventions that enhance farm productivity, improve postharvest management, expand access to finance and appropriate technologies. Kilimo Trust Rwanda (KTR) is one of the implementing partners of the Power for Food Partnership (P4FP) Project. The P4FP promotes the integration of Regenerative Agriculture (RA) with the Productive Use of Renewable Energy (PURE) across six districts of Rwanda including Nyagatare, Kayonza, Rwamagana, Bugesera, Rutsiro and Rubavu. The project also aims to increase farmers productivity, strengthen climate resilience, enhance market access, and accelerate the adoption of regenerative agriculture powered by clean energy technologies. Kilimo Trust Rwanda invites qualified and experienced solar technology suppliers to submit Expressions of Interest (EOI) to design, supply and install a hybrid solar system for livestock farmers to promote sustainable use of green energy for livestock farmers. b) Overview of the assignment This call aims to design, supply and install a hybrid solar PV system designed to support Chaff cutter and auxiliary electrical loads with battery backup and grid integration. The proposed solution is designed to promote the use of clean, renewable energy by maximizing solar power generation while reducing dependence on conventional grid electricity. It features high-efficiency solar PV modules, advanced lithium battery storage, and a hybrid inverter with intelligent energy management and grid backup capability. This integrated system delivers a reliable, efficient, and sustainable power supply for the intended application. c) System objectives. The proposed systems are intended to: Provide reliable energy for chaff cutter motor and auxiliary loads Maximize daytime solar energy utilization Provide night-time battery backup for auxiliary loads Utilize the utility grid as supplementary backup. Ensure stable and efficient system operation. d) Load requirements. Chaff Cutter (11KW) + Auxiliary Loads 13KW. System sizing calculations (Daily Energy Consumption): Schaff Cutter: 11KW X 2Hrs =22KWh (Only at Daytime) Cooler: 2KW X 15Hrs= 30KWh Milking system: 2.2KW X 0.3=0.66KWh Mixer: 1200W X 0.3Hrs=360Wh=0.36KWh Lighting: 150W X18Hrs= 27000Wh=2.7KWh Daily Total Energy= 22+30+0.66+0.36+2.7= 55.72KWh/day i. Factor in System inefficiency Solar systems experience energy losses from Inverter conversion, Wiring and Battery heat. Assuming a standard 80% system efficiency (20% loss), divide the daily energy requirement by efficiency. Total Required Generation=55.72KWh/0.80=69.65KWh ii. Determine Solar Array Size Solar Panels only produce peak power during sunlight hours. Assuming an average of 4 peak sun hours per day in Eastern Province, divide the total required generation by the sun hours. Solar Array Size=69.65KWh/4Hours= 17.41KWp iii. Size of Battery storage The battery must power the load when the sun is not shining (roughly 12 hours a day) and handle the cloudy days. Assuming Nighttime Consumption: 2.15KW X 12hours =25.8KWh (all lights and cooler) Lithium Battery Sizing (80% Depth of Discharge): To keep the battery healthy must not drain it completely. Battery Capacity= 25.8KWh/0.80=32.25KWh NOTE: The Chaff Cutter will only operate during the day time, the battery capacity will only consider nighttime load iv. Inverter Sizing The inverter converts DC power into AC power. It must handle the PV power and the potential startup surges from the Chaff Cutter and Other Inductive Loads. [Disclaimer: The above text is machine translated. For accurate information kindly refer the original document.] Tender Link : https://www.jobinrwanda.com/job/call-expression-interest-eoi-design-supply-and-install-hybrid-solar-livestock-farmers