Power Monitor Accuracy

For the last week I've taken some measurements to see how accurate the power meter is. To do this I:

• Took a reading from my proper electricity meter when I installed the power monitor.
• Noted the daily measurements from the power monitor for the remainder of that day and the rest of the week.
• A week later took another proper meter reading and noted the cumulative measurement up to that point.

Results:

My meter readings state I used 111 kWh

The power meter readings state I used 145 kWh

So a 31% error.....

I will contact LightwaveRF support as this can't be correct. Another update when I know more.....