A configuration for electrically coupling photovoltaic roof tiles together is described herein. Specific embodiments for describing redundant connections between the photovoltaic roof tiles are described. In particular, a junction box on each photovoltaic roof tile includes a two cable terminals that are electrically coupled together by a diode. One of the cable terminals is electrically coupled to two cables that run in parallel to a junction box on another photovoltaic roof tile and is also coupled to internal circuitry of the photovoltaic roof tile. The diode allows the internal circuitry to be bypassed through a bypass cable for safety purposes.