The dairy farm consumes around 40,000 kWh of electricity a year. In addition to the milking machines and automatic feeding systems, other loads in the cowshed and neighboring buildings need to be supplied with power. In order to save money on energy costs and generate green solar power supply in the future, the farm operator has decided in favor of SMA Energy Systems Business with two Sunny Tripower CORE1 inverters as well as the commercial storage system, SMA Storage Business.
In addition to a 100 kW solar system, which modules were installed on the roof of the cowshed, the farmer's Energy Management System also has the SMA Storage battery with a capacity of 67 kWh and a Sunny Tripower Storage 60 battery inverter that ensures that the solar power generated on the roof is stored in the battery and can be provided at all hours if required. This gives the farm a 97% independence rate, and the purchase of electricity from the grid is almost 0%. The entire system was installed by the SMA Solar professional partner Vetter.
The SMA Data Manager M is an essential part of SMA Energy Systems Business. The energy manager monitors and analyzes all of the farm's energy flows and sends the data to the Sunny Portal powered by ennexOS or the SMA Energy app on a smartphone or tablet, where the data are then clearly visualized. Through this process, the dairy farm owner now knows that it is not the milking process that consumes most of the energy, but rather the mixing of the feed and the cleaning of the milking equipment. He carries out these two daily routine processes in the morning or afternoon, if green power from his own PV system is available. In doing so, he avoids expensive load peaks and prevents purchasing power from the grid.
„This installation is a worthwhile investment, even on cloudy days with little sunshine. Even the installer didn't expect such results. When it pays for itself, the energy won't cost me a cent more.“
Michael Nägele, dairy farmer.
During the night hours, the electricity requirement of the barn is low. With a herd of around 80 dairy cows, the energy required for night is always 100% covered by the energy stored during the day, even on cloudy days with little sunshine. "Even the installer didn't expect such results," said Michael.
The time is long-lived when solar energy from one's own roof was generated solely for feeding electricity into the grid. Harmonized systems such as the SMA Energy System Business make it easy for farmers not only to generate solar power, but also to optimally control and store solar power and thus use it flexibly. For PV systems above 100 kW, the self-produced electricity can be sold using SMA Data Manager M and direct selling SMA SPOT, thereby generating additional yields.