The Rain factory was built in 1957 and processes 12,000 tonnes of beets per day during the campaign. The factory operates around the clock during the beet campaign from September to the end of December and 2,000 tonnes of sugar are produced daily. In other words, on average, the annual requirements of one German citizen are met every two seconds. The plant's production output is thereby able to satisfy the needs of about five million consumers. The silos can hold 90,000 tonnes of sugar.

Some of the sugar produced is stored loose in dry bulk tankers and delivered in 50 and 25 kg bags. The following products are also manufactured at the Rain facility:

In addition to the systems for manufacturing sugar, the factory has a laboratory in which soil samples or plant diseases are analyzed, depending on the time of year. Every year, lab technicians analyze about 50,000 soil samples for the purpose of making fertilizer recommendations and carry out around 4,000 investigations into plant diseases.

During the campaign, about 250 people are employed at the plant. The number drops to 220 the rest of the time. Most are specialists qualified to handle the sugar extraction equipment, as well as repair and maintain the sophisticated technical systems.

Sugar beets are planted for the factory on an area of 16,000 hectares by 3,100 farmers. The area covered includes Swabia, upper Bavaria and parts of Württemberg. Beet cultivation and payment are regulated by a contract. In areas such as beet growing and the associated logistics, among others, Südzucker and farmers work in partnership in order to ensure that the quality of the raw materials supplied to the factories; i.e., beets, is the best possible, and that they arrive at the right time.