The following factors need to be considered when judging the durability and deformation resistance of plastic meter box and small power distribution units:

Material quality: First, check the material of the meter box and small power distribution unit. High-quality engineering plastics, such as polycarbonate or fiberglass-reinforced polymers, generally have better durability and resistance to deformation.

Thickness: Thicker meter box and small power distribution unit walls will be more durable because they are more resistant to physical damage and environmental influences.

UV Stability: If the meter box and small power distribution unit will be exposed to sunlight, make sure the material has good UV stability to prevent the color from fading and the material from becoming brittle.

Temperature range: Understand the temperature tolerance range of the meter box and small power distribution unit material to ensure that it will not deform or crack under extreme temperature conditions.

Resistance to chemical substances: Check whether the meter box and small power distribution unit can resist the erosion of chemical substances (such as acids, alkalis) to prevent material corrosion or deformation.

Structural design: The structural design of the meter box and small power distribution unit also affects its durability. There is a strong outer shell and support structure that enhances resistance to deformation.

Certification standards: Check whether the meter box and small power distribution unit meets relevant certification standards, which can be used as an indicator of product quality.

The best approach is to check with the manufacturer or supplier to find out how their products are designed and tested to ensure durability and resistance to deformation. Additionally, reviewing reviews and feedback from other users can also provide information about a product's performance.