A semi-electric straddle stacker is a type of material handling equipment used to lift and move heavy loads in warehouses, factories, and other industrial settings. It combines manual and electric operation to provide lifting and stacking capabilities. Here are some key features and characteristics of a semi-electric straddle stacker:

Lifting Capacity: Semi-electric straddle stackers are designed to lift and transport loads of various weights. The lifting capacity can range from a few hundred kilograms to several tonnes, depending on the specific model.

Manual and Electric Operation: The term "semi-electric" refers to the combination of manual and electric operation. The stacker is manually propelled and steered by an operator using handlebars or a control panel. The lifting mechanism, on the other hand, is electrically powered, usually by a rechargeable battery, which eliminates the need for manual lifting. 

Straddle Design: A straddle stacker is characterized by its straddle legs, which straddle the load to be lifted. This design allows the stacker to lift loads that are wider or longer than the forks themselves. The straddle legs provide stability and support during lifting and stacking operations.

Forks: The stacker is equipped with forks or adjustable forks that slide underneath the load. The forks are used to lift the load off the ground and transport it to its desired location. The forks can be raised and lowered using the electric lifting mechanism.

Lifting Height: Semi-electric straddle stackers have a maximum lifting height, which determines how high they can lift loads. The lifting height can range from a few meters to several meters, depending on the specific model.

Maneuverability: The stacker is designed for maneuverability in confined spaces, such as aisles in warehouses or narrow passages. It typically has a compact size and a tight turning radius, allowing it to navigate tight corners and congested areas with ease.

Safety Features: Safety is an important aspect of semi-electric straddle stackers. They are equipped with features such as brakes, emergency stop buttons, and safety sensors to ensure safe operation. Some models may also have features like load backrests, horns, and visibility aids for enhanced safety.

Application: Semi-electric straddle stackers are commonly used for stacking and transporting palletized loads, such as pallets of goods or materials. They are suitable for various industries, including warehousing, logistics, manufacturing, and distribution.

When choosing a semi-electric straddle stacker, consider factors such as lifting capacity, lifting height, maneuverability, battery life, and safety features. It's important to select a stacker that meets your specific lifting and stacking requirements and complies with safety standards and regulations in your region.