Larger sizes are usually laminated, and only those of a few tenths of a watt use epoxy panels.
Because laminated battery panels have a longer lifespan than epoxy panels. However, they are longer and more effective. cannot be used for low power, so small ones can only be packaged in epoxy form. At present, epoxy boards are mainly used for mobile phone chargers, lawn lamps, other low-power solar toys, etc.
Epoxy board is a process used on low-power solar panels less than 3W. Generally, the lifespan is not long. The die casting process is typically used on large components from 3 to 280 W to produce finished products. high demands on quality and service life
I hope this can be helpful to you.