In some examples, a power adapter for sharing redundant power comprises a primary power input; a redundant power input; a redundant power supply identification signal (RPS ID) input; and a controller coupled to the RPS ID input. The controller is to direct power from the primary power input to an electronic device; direct power from the redundant power input to the electronic device, to another power adapter, or both; modify an RPS ID from the RPS ID input in response to directing power from the redundant power input to the electronic device; and output the modified RPS ID to the another power adapter.