It's always the same problem: You save energy but the electricity bills are still getting more expensive. Luckily, there is a solution: Solar power can be generated in Germany for 12 cents per kilowatt hour. In contrast, utilities currently charge an average of 25 cents for domestic electricity. What better reason to invest into your own photovoltaic system? Solar storage systems can increase on-site consumption by up to 70 percent. They absorb surplus solar power and pass on the energy as required — expensive grid power is hardly necessary. This makes the systems very attractive for consumers: According to an EuPD Research survey, almost 90 percent of solar operators are already thinking about buying an additional storage system.