The invention relates to a capacitor charger system (100) comprising a capacitor charger module (110), an isolated acquisition module (120), and a digital control module (130). The isolated acquisition module (120) is configured for sampling an output voltage level of said capacitor charger module (110). The digital control module (130) is connected to the isolated acquisition module (120) via a bi-directional link and connected to the capacitor charger module (110) via a control signal interface. The digital control module (130) is configured for generating control signal information and synchronization signal information based on data representative of sampled output voltage levels received via the bi-directional link from the isolated acquisition module. The digital control module (130) is further configured for sending the control signal information to the capacitor charger module (110) via the control signal interface and for sending the synchronization signal information to the isolated acquisition module (120) via the bidirectional link. The capacitor charger module (110) is controlled based on the control signal information from the digital control module, and the isolated acquisition module (120) is configured for performing sampling based on the synchronization signal information.