Does TED measure VOLTAGE?

Many people concerned about accuracy ask this question all the time.  And rightfully so.

Yes, TED does measure VOLTAGE and POWER FACTOR in its calculations.   Measuring these components is critical if you want accurate data. Here is the very fundamental formula for calculating AC POWER: 

Power = Voltage x Current x Power Factor

As you can see, there are 3 vital ingredients that must be known to have accurate energy and power data.  If you don't measure them all, you will not have accurate data.

Systems that use batteries cannot measure either Voltage or Power Factor and therefore are missing 2 of the 3 vital ingredients in the formula.  If voltage and Power Factor are NOT measured, it is the equivalent to having a BLT sandwich without the bacon and lettuce....two of the 3 important ingredients are missing.