Sundrop system. The primary inputs to a greenhouse are heat, electricity, water, and nutrients. The Sundrop System is a collection of technologies which, when used in combination, reduce the need for finite resources in these inputs versus conventional greenhouse production. In Sundrop Farms’ first facilities in South Australia, these technologies include concentrated solar power, thermal desalination, and steam-driven electricity generation. This is the first combined heat, power, and water system powered by solar energy for greenhouse production.