Series arc-fault detectors (AFDs) are being developed to meet National Electrical Code 690.11. These devices de-energize the photo-voltaic system when an arc-fault occurs in order to prevent electrical fires. Many AFDs use AC noise on the DC side of the PV system to detect arcing conditions. This methodology accurately detects arc-faults, but leaves the PV system vulnerable to nuisance tripping from noise sources and fails to differentiate parallel and series arc-faults. A need remains for AFDs which safely handle series and parallel arc-faults, passive and prognostic arc-fault mitigation tools, and instruments for locating arc-faults after the AFD has tripped.