With　global　warming　and　rising　energy　consumption,　energy　conservation,　emission　reduction,　and　the　development　of　renewable　energy　have　become　critical　global　priorities.　In　this　context,　phase-change　refrigeration　technology　has　emerged　as　a　promising　solution　for　energy　savings.　This　paper　explores　the　integration　of　phasechange　cold　storage　technology　and　mini-electrical　storage　technology　in　direct　current(DC)　refrigerators.　Firstly,　household　refrigerators　were　converted　to　DC　operation,　and　a　test　bench　for　phase-change　cold　storage　DC　refrigerators　was　constructed.　Subsequently,　experimental　research　was　carried　out　on　the　temperature　maintenance　time　of　the　refrigerator　after　power-off　and　the　energy-saving　effect　of　phase-change　cold　storage　refrigerator　in　the　process.　The　results　demonstrated　that　the　temperature　retention　time　of　in　the　refrigerator＇s　compartments　increased　by　30　h,　20　h,　and　5　h,　respectively,　after　power　failure　compared　to　the　refrigerator　without　phase　change　materials.　The　18-h-on/6-h-off　mode　is　the　most　energy-efficient　and　cost-effective　approach,　while　the　12-h-on/12-h-off　mode　offers　significant　advantages　in　grid　load　balancing　and　system　reliability,　despite　causing　minor　temperature　fluctuations.　Moreover,　integrating　phase-change　cold　storage　with　mini-electrical　storage　not　only　enhances　energy　efficiency　but　also　helps　reduce　carbon　emissions.