Design and Fabrication of a Solar-Powered Multipurpose Agricultural Sprayer for Smallho...

Objective: To develop and demonstrate a solar-powered, mobile sprayer capable of efficient pesticide, fertilizer, and water application for small-scale Indian agricultural operations.

Indian farmers, especially smallholders, face challenges in accessing affordable and versatile mechanized spraying solutions for pesticides, fertilizers, and irrigation. Manual spraying is labor-intensive, inconsistent, and exposes workers to chemicals, while diesel/electric machines are costly and often unavailable in rural areas.

This project proposes an engineering solution: a compact, solar-powered multipurpose agricultural sprayer. The system integrates photovoltaic panels, rechargeable batteries, a variable-speed pump, and modular tanks, mounted on a mobile frame suitable for uneven farm terrain. The sprayer is designed for ease of use, efficiency, and safety, with adjustable nozzles and flow controls.

Key deliverables include: A fully fabricated working model with solar charging, pump, and spray mechanisms; performance validation for pesticide, fertilizer, and water delivery; ergonomic controls; cost analysis; and a technical report. Students demonstrate the prototype in live field conditions, highlighting solar energy utilization and multi-functionality.

Industry and societal impact: The solution reduces operational costs, promotes sustainable energy use, minimizes chemical exposure, and improves productivity for rural farmers. The design is scalable for local manufacturing and adaptation to various crop types, supporting India's agricultural modernization and environmental goals.