Once I got the solar powered webcam working, I started thinking about how to make it more power efficient. Looking at the specs of the inverter, I found it consumers 3W all the time. That’s a lot of power wasted. To make things more power efficient, I replaced the inverter with a circuit I built. It is a highly efficient 12v to 5v switcher. The picture below shows the near finished product. It all fit in a box slightly smaller than the inverter. Now that it is installed, the battery lasts about twice as long.