Define small. There’s “I’m going backpacking and I might need to charge my cell-phone” small; and then there’s “I’m at home and I need to charge cell phones and multiple sets of AA batteries, power banks and tablets at the same time” small.

My small backpack-able panel is 21W and my panels for home range from 14 to 100 watts. The 100 watt unit has a 10 amp charge controller with dual 2 amp USB ports (for AA/AAA/18650 batteries) as well as an output for my GZ Yeti 400.

Small is relative.