The 20-20-20 goals set by the European Commission puts a lot of stress on the existing transmission and distribution networks, due to increasing amount of distributed power generation. The burden can be lowered either by upgrading the networks or by introducing SmartGrid technology. The target for the PVNET.dk project is to study how to integrate large amount of PV into the existing network, without having to reinforce it. This is done by examining different types of grid voltage control, applying SmartGrid functionalities and introducing other ancillary services integrated into the inverters. The background for the PVNET.dk project is the already ongoing EcoGrid EU project, the Danish Cell Project and the Photovoltaic Island Bornholm project. The project is in part financed under the Electrical Energy Research Program (ForskEL, grant number 10698), administrated by the Danish transmission network operator Energinet.dk