Fault current is the electrical current which flows through a circuit during an electrical fault condition. A fault condition occurs when one or more electrical conductors short to each other or to ground. Electrical devices such as inverters are typically rated to withstand a certain level of fault current, meaning. The demand for power generated and consumed by systems including solar, batteries, fuel cells and electric vehicles is accelerating as we transition to a clean energy economy. As these clean power sources are all based in DC, the desire to combine these systems. Having less fault current present on a DC bus will of course increase the safety of your next battery energy storage or hybrid DC energy project. It will also reduce the cost. Each power device connected to a DC bus will make its own fault current contribution to the system. An engineer designing or approving the system for deployment will typically evaluate such.