Solar-powered Irrigation System

Sustainability Issues

Unlike farmers in developed countries who have full access to sophisticated technologies, framers in many poorer countries are facing many challenges such as unreliable rainfall, low crop yields – lacking access to modern farming technologies. Powered- efficient and cost effective method of irrigation system being one of the most largest challenges as farmers are far away from stable utility grid and results in low crop yields and income of farmers.

Technology: SunCulture AgroSolar Irrigation System 

  • The Sun Culture AgroSolar Irrigation Kit combines cost-effective solar pumping technology with a high-efficiency drip irrigation system.
  • The solar panels provide the pump’s electricity directly without the need for expensive batteries or inverters.
  • Water is pumped from water source (lake, river, stream, well, etc.) into a raised water storage tank during the day.
  • When irrigation occurs during the evening, a valve on the water tank is opened and water flows down (gravity) through a filtration system and onto crop root zones through irrigation tape.


  • Farmers in developing countries that lack access to modern irrigation system
  • Department of Agirculture
  • Governmental entities that oversights agriculture practices
  • Investors of agriculture in developing countries


  • Farmers with potential demand of such system contact Sun Culture to determine feasibility of installation
  • Contact department of agriculture or municipal government for potential subsidies and funding options
  • Install and deploy the irrigation system in large scale



UNI: MH3730



GravityLight: power from the lift of a weight.

1. Sustainability Problem: Kerosene lamps

2.3 billion people across the world have unreliable or no access to electricity. Consequently, many african countries rely on kerosene lamps, which pose economic, health and environmental hazards.


2. Technology solution: Gravity Light

The set-up is pretty simple, the whole thing works a bit like a pulley – all you need to do is add 12 kg of weight to one end of the bead cord (this can be a bag of sand, rocks, whatever you like), and then lift that weight up by pulling down on the lamp attached to the other end.

Thanks to gravity, the weight slowly descends back down to the floor, transforming potential energy into kinetic energy as it drops. This kinetic energy then powers a drive sprocket and polymer gear train that lights up the LED as it goes. Once the weight gets to the floor, the light goes out and you need to repeat the process, but each pull provides you around 20 to 30 minutes of light, depending on how high you lift the weight up in the first place.



The stakeholders

  • Potential users and crowdfunding donors
  • The company (The GravityLight Foundation)
  • Retailers
  • Local governments / NGOs to foster usage of this product



  • The GravityLight Foundation has successfully gathered
    $400,927 USD (128% of the original goal) on July 18, 2015.  This enabled the plans to set up an assembly line in Kenya. First units should be available in 2016.
  • Support from NGOs, retailers and local governments is key to allow distribution of the GravityLight in areas with excess usage of kerosene lamps and/or limited access to electricity.