However, the subsidy application must always be submitted before purchasing the device, which is also known as a balcony power station. If the system costs up to 500 euros, 100 per cent is subsidised; if it is more expensive, the buyer must pay the difference themselves. The background to the changes is the Solar Package I recently adopted by the German government. According to the economic administration, the corresponding improvements for consumers will be adapted in the funding guidelines of the Berlin Solarplus funding programme on 31 May. According to the Senate, Berlin should become climate-neutral well before 2045. The expansion of solar energy production on roofs and balconies is seen as a building block for achieving this goal.