三一重工STC250C5-1混动版起重机的优点有：1. 高效节能：该起重机采用了混合动力技术，将内燃机和电动机相结合，使起重机在高负荷工况下能够减少燃油消耗和排放，实现节能环保。2. 灵活多变：起重机配备了全地形四轮驱动系统，可以适应各种复杂的工地地形和条件，灵活性和适应性强。同时，还具备折叠臂装置，可以方便地进行运输和储存。3. 操作方便：起重机采用了智能化控制系统，具有自动平衡和抗干扰功能，操作简单方便，提高了起重机的安全性和准确性。4. 承载能力强：该起重机具有较高的承载能力，最大起重量达到250吨，可以满足大部分工地的起重需求。5. 低维护成本：起重机采用了优质的材料和先进的制造工艺，具有较长的使用寿命和良好的可靠性，维护成本较低。总的来说，三一重工STC250C5-1混动版起重机具备高效节能、灵活多变、操作方便、承载能力强和低维护成本等优点，适用于各种起重作业的需求。

The advantages of Sany Heavy Industry STC250C5-1 Hybrid Crane include:1. Energy efficient: the crane adopts hybrid technology, combining the internal combustion engine and the electric motor, so that the crane can reduce fuel consumption and emissions under high load conditions, realizing energy saving and environmental protection.2. Flexible and versatile: the crane is equipped with an all-terrain four-wheel drive system, which can be adapted to a variety of complex construction site terrain and conditions. Flexibility and adaptability. Meanwhile, it is also equipped with folding jib device, which can be conveniently transported and stored.3. Convenient operation: the crane adopts intelligent control system with automatic balancing and anti-interference function, which is simple and convenient to operate, and improves the safety and accuracy of the crane.4. Strong loading capacity: the crane has a high loading capacity, and the maximum lifting capacity reaches 250 tons, which can satisfy lifting needs of most construction sites. 5. Low maintenance cost: the crane adopts high-quality materials and advanced manufacturing technology, which has a long service life and good reliability, and low maintenance cost. Overall, Sany STC250C5-1 Hybrid Crane has the advantages of high efficiency and energy saving, flexibility, easy operation, strong load capacity and low maintenance cost, which is suitable for all kinds of lifting needs.