Heat Reflective paint for cool roofs .

Solid waste piling up in our cities, methane emissions from landfills, our dependence on imported fossil fuels, and the overuse of chemical fertilizers—all of these are silently eroding our environment, our health, and the very food we eat. These are not isolated problems; they are deeply connected. At Hinren Engineering, we believe the answers lie not in bigger landfills or more imports, but in transforming waste into resources. Through our decentralized biogas plants, household food waste can be converted into clean cooking gas and the residue into natural liquid fertilizer. How it works: 1. Food waste is fed into a digester, where microorganisms naturally break it down. 2. The result? Biogas—a renewable fuel that can replace LPG in the kitchen. 3. What remains is a nutrient-rich liquid that works as an organic fertilizer, reducing the need for harmful chemicals in our fields. The impact: A. Less waste in landfills, fewer methane emissions. B. Energy independence with a clean, renewable fuel. C. Healthier soil, crops, and food without chemical residues. D. A simple yet powerful step towards fighting climate change. Most importantly, this is a decentralized solution. Families and communities can take control of their waste, energy, and food security—creating a true circular economy right at the grassroots. At Hinren, we see waste not as a burden, but as an opportunity: to cook our meals, to nourish our soils, and to heal our planet.

Off-grid solar photovoltaic (PV) systems are designed to operate independently of the utility grid, making them the perfect solution for rooftops in areas with unreliable or poor-quality power supply. By combining solar panels with battery storage, these systems ensure a continuous supply of clean energy—day and night, throughout the year—without depending on the grid. How It Works A. Solar Panels (PV Array): Mounted on the rooftop, they convert sunlight into direct current (DC) electricity. B. Charger: Directs DC power from the panels into the battery bank. C. Lithium Batteries: Store excess solar energy during the day for use at night or during cloudy periods. D. Inverter: Converts DC power into alternating current (AC) for household appliances. During the day, solar power directly runs your loads while also charging the batteries. After sunset, the stored energy powers your home seamlessly—ensuring uninterrupted electricity. Why Choose Rooftop Off-Grid Solar? 1. Energy Independence: No reliance on grid electricity or power cuts. 2. Resilient & Reliable: Works in remote locations or urban areas with erratic supply. 3. Smart Design: Load analysis, proper battery sizing (C-rating), and efficient wiring ensure reliable performance. 4. Sustainable Power: 100% solar-based, reducing dependence on diesel generators and minimizing carbon footprint. Ideal For 1. Homes and farmhouses in areas with frequent power cuts. 2. Rooftops in villages or towns without reliable grid connections. 3. Institutions, offices, and small businesses seeking self-reliant energy solutions. Off-grid rooftop solar systems are rugged, functional, and future-ready, giving you the freedom to generate, store, and use your own clean energy—anytime, anywhere. “Your roof, your power—independent, reliable, and sustainable.”

Agro-Photovoltaics or Agro-PV or Agri-PV is a rooftop innovation that brings together solar power generation and urban farming in one integrated system. Instead of choosing between panels or plants, Agro-PV makes rooftops work smarter—producing both clean electricity and fresh nutrition. By doing so, it turns unused roof space into a productive, climate-positive asset. How it Works Solar panels are mounted on elevated structures, allowing sunlight and airflow to reach the plants below. Walkways are incorporated for easy maintenance, while the design ensures that crops receive balanced light and shade. This dual setup not only creates food and energy but also keeps the rooftop cooler, improving comfort and boosting solar efficiency. Key Benefits 1. Dual Purpose Use: Generate electricity and grow fresh produce from the same roof. 2. Cooling Advantage: Plants reduce rooftop heat, cut AC demand, and enhance panel performance. 3. No Roof Damage: Crops are grown on raised platforms, removing the need for extra waterproofing. 4. Livable & Green: Creates shaded sit-outs, fosters biodiversity, and improves rooftop aesthetics. 5. Water Wise: Solar panels double up as rainwater catchment systems, supporting harvesting. Why it Matters for India With over 1.5 billion people and rising demand for food and energy, Agro-PV offers a scalable urban solution. Rooftops across homes, apartments, schools, and offices can be transformed into self-reliant systems that contribute to both climate action and community well-being. “Clean energy and clean nutrition—right from your roof. A step toward a greener, healthier nation.”