In the case you have an existing energy monitoring device, e.g., in the form of an inverter monitor, the Powersensor reading may, from time to time, slightly differ from this reading.
The inverter or meter power measurement is made instantaneously and is highly dependent on the interval used for the measurement.
Independent measurement devices tend to have a different view of what is occurring, and the reason for this is two-fold;
- Your home’s power usage and generation can change rapidly, so any small variation between when the inverter measures that of the Powersensor can appear different.
- Powersensor averages power levels over a 30-second interval, which means power levels will smooth out over the period.
- Comparing this number to that of the inverter is difficult as we don’t know how the inverter makes the same measurement.
- If the inverter uses a shorter interval, it will tend to show data with higher peaks.
- For Powersensor, we adopted an approach defined for Energy monitors under the Victorian government's program for in-home energy displays.
Tips and tricks:
- For the most precise reading, you can follow these steps:
- Comparing the kilowatt-hours (or kWh) totals from both the inverter and the Powersensor app over a longer period of time may show a more accurate reading.
- Checking once at the end of the day is a very simple way to compare how the two compare and how accurately your Powersensor installation is calibrated.