Measuring DC2DC Converter Efficiency - 12v Solar Shed

As charge controllers and solar panels get more efficient we shouldn't be throwing away the energy when we use it. I wanted to see how efficient my DC2DC converter was on the load of my 7s Lithium Ion pack. All the items used in this video: LM2956 Buck Converter: https://goo.gl/M3UY8w TusoTek Buck/Boost 5A Converter: https://goo.gl/XiUbfT Winners LCD Buck Converter: https://goo.gl/o8WIUe CPT Step Down Converter 24-12v: https://goo.gl/FEJgTx PortaPow Premium DC Monitor: https://goo.gl/uFS3DC