Battery　capacity　degradation　in　battery　electric　buses　(BEBs)　poses　a　significant　operational　challenge　for　transit　agencies.　This　study　presents　a　sustainable　battery　scheduling　and　echelon　utilization　framework　considering　battery　capacity　fading　and　charging　infrastructure　integrated　with　solar　photovoltaic　(PV)　and　energy　storage　systems.　The　framework　aims　to　minimize　the　sum　of　bus　charging,　battery　replacement,　and　carbon　emission　costs　during　the　BEB　lifespan.　We　first　present　a　power　battery　replacement　problem　for　a　single　bus　fleet,　then　extend　it　to　a　joint　power　battery　replacement　and　fleet-depot　matching　problem.　Finally,　we　propose　a　power　battery　replacement　and　fleet-depot　problem　by　introducing　solar　PV　and　energy　storage　systems.　Dynamic　programming,　Lagrange　relaxation,　and　a　two-step　approach　are　adopted　to　solve　the　three　problems.　A　case　study　involving　six　bus　depots　in　Beijing　demonstrates　that　optimal　battery　replacement　schedules　can　significantly　lower　charging　costs.　Moreover,　integrating　solar　PV　and　energy　storage　is　shown　to　considerably　reduce　both　charging　costs　and　carbon　emissions.