Solar-Powered Smart Mini Cold Storage System for Fresh Vegetables in North Eastern Region (NER)

Background: The North Eastern Region (NER) produces a substantial quantity of fresh vegetables and horticultural crops. However, due to inadequate cold storage infrastructure, unreliable electricity supply, difficult terrain, and transportation delays, farmers often face heavy post-harvest losses. Most remote farming areas lack access to affordable small-scale cold storage facilities near production clusters and local markets. As a result, fresh vegetables deteriorate rapidly before reaching consumers, reducing farmer income and affecting supply chain efficiency. There is a need for a low-cost, energy-efficient, and decentralized cold storage solution suitable for rural and remote regions of NER. Description: This problem statement seeks the development of a Solar-Powered Smart Mini Cold Storage System for farmers and vegetable producers in the North Eastern Region (NER) to reduce postharvest losses of perishable vegetables. Due to poor cold-chain infrastructure, difficult transportation routes, frequent power cuts, and long travel durations from remote villages to markets, fresh vegetables often spoil within a short time after harvest. Farmers are forced to sell produce at low prices or suffer financial losses due to lack of nearby storage facilities. The proposed system should function as a decentralized mini cold storage unit that can be installed at village-level collection centres, local markets, farmer cooperatives, and farm-gate aggregation points. The system should: a. Preserve fresh vegetables such as tomatoes, cabbage, beans, leafy vegetables, chilli, and other horticultural produce under suitable storage conditions b. Operate using solar energy with battery backup support for off-grid and low-electricity areas c. Maintain controlled temperature and humidity levels for extending shelf life of vegetables d. Include smart monitoring features for: • Temperature fluctuation • Humidity variation • Power failure alerts • Storage condition status e. Be compact, modular, and suitable for deployment in remote hilly terrain and rural agricultural clusters f. Be energy-efficient, weather-resistant, and capable of operating under varying climatic conditions of NER g. Support easy operation and low maintenance for farmer groups, cooperatives, and local vendors h. Help reduce spoilage during temporary storage before transportation to larger markets The solution should strengthen local agricultural supply chains, reduce vegetable wastage, improve market accessibility, and enhance income opportunities for farmers in the North Eastern Region. Expected Solution: A functional hardware-based smart mini cold storage system suitable for rural and remote agricultural areas of the North Eastern Region. The proposed solution should include: a. Solar-powered cooling system with energy-efficient operation b. Insulated cold storage chamber for preserving fresh vegetables and horticultural produce c. Battery backup support for uninterrupted operation during power outages or low sunlight conditions d. Temperature and humidity monitoring mechanism for maintaining suitable storage conditions e. Smart alert/indicator system for: • Temperature fluctuations • Power failure • Unsafe storage conditions f. Compact and modular design suitable for village-level deployment and difficult terrain g. Weather-resistant and durable structure for varying climatic conditions in NER h. Low-maintenance and cost-effective system suitable for farmer cooperatives, local markets, and collection centres i. Basic digital monitoring/display interface for storage status and system performance The solution should help reduce post-harvest vegetable spoilage, improve shelf life of produce, strengthen local cold-chain infrastructure, and enhance income opportunities for farmers in the North Eastern Region.