A　solar　air　dual-source　heat　collecting　evaporator　(condenser)　using　a　micro　heat　pipe　array　and　a　dual-source　direct　expansion　heat　pump　system　was　designed.　This　system　effectively　reduces　the　temperature　of　the　photovoltaic　module　to　improve　its　power　conversion　efficiency　and　simultaneously　achieves　heating　and　refrigeration　functions.　The　multiple　energy　complements　each　other　in　such　an　energy　system　for　building　applications.　An　experimental　platform　for　a　solar-air　energy　direct　expansion　heat　pump　system　was　established　and　the　performance　of　the　power　generation,　cooling　supply,　and　domestic　hot　water　supply　was　tested　and　analyzed.　When　the　heating　system　in　the　dual-source　direct　expansion　heat　pump　system　operated,　the　PV/　T　assembly　had　a　significant　cooling　effect　on　the　photovoltaic　module.　Compared　to　the　rest　conditions,　the　photoelectric　power　and　photoelectric　efficiency　were　improved　by　56.　43%　and　53.　15%,　respectively.　During　the　heating　process,　the　dual-source　direct　expansion　heat　pump　heated　180　L　water　from　20　℃　to　50　℃.　The　average　system　heating　COP,　heating　power,　total　power　generation,　and　total　power　consumption　were　4.　59,　3.　20　kW,　1.　43　kW·h,　and　1.　36　kW·h,　respectively.　The　average　refrigeration　EER　was　2.　29　when　cooling　from　12　℃　to　7　℃.　©　2022　Chinese　Academy　of　Sciences.　All　rights　reserved.