First and foremost checkout the Smappee Academy video that handles this subject:
In case you have incorrect readings for either your consumption, grid, production or submeters, you can follow this guide to help you resolve it.
The reason for wrong measurements can be:
- The CT itself is placed in the wrong direction.
- The CT is place on a wrong place (Grid CT must always be placed where all import and export is measured)
- A wrong phase has been assigned to the CT configuration (in this case you need to set the CT to the correct phase under load configuration in the App)
Note that in case of Grid the measurements can be negative due to excessive production being exported towards the grid.
Check CT direction
On the CT('s) you have a mark "K -> L", you need to make sure this is correctly installed. The arrow has to point to the direction of the current flow.
- For production/battery the arrow needs to point away from the inverter towards the fusebox.
- For Grid the arrow must point away from the meter towards the fusebox.
- For a submeter the arrow must point away from the fusebox towards the submetered load.
Wrong phase assigned
If the CT clamp(s) are all connected correctly and you still get wrong measurements, probably the wrong phase is assigned to the CT clamp.
To solve this, check in the fuse box the phases with a multimeter.
Warning: The phases labeled in the fusebox are not always the same phases that Smappee is using, it depends on how you've connected the Smappee Power box.
Warning: For Delta (3*230) always measure L1 and L2 of a 3 phase load. (L3 has a special meaning in Delta and is only meant for monophase loads between L1 and L2)
A detailed description on how to do this can be found in chapter 9 of our manual:
Smappee Infinity Installation manual
Tips on how to solve
Make sure you have a Board with the "Live Electricity Values" and the "Load Configuration" cards
Go to Settings -> Your Smappee Monitors -> Load configuration
Tips for Solar panels
Check the power and the power factor.
Power should always be positive and power factor should be around 1.0
Example of Solar configured to the wrong phase.
-> Power is negative
-> Power factor is 0.47
Changing the Phase of Solar to Phase L1 yields much better results, do this via "Load configuration"
Don't forget to press "Complete configuration" after change.
After change to L1 to power factor is now 0.99, power is not negatief
Tips for Grid and other loads
Turn on heavy load or charge a car and check the power and power factor.
See the example below of a location that has correct measurements.
- For the Charging station submeter that the power factor is 1.0 and power is positive, this means that the submeter is correctly configured.
- For the Grid you can clearly see that L2 and L3 have at least the power of the Charging station, except L1, but this is normal because on L1 there are solar panels. On L1 there is currently a export of 737w.
- For the Solar values the power factor is 0.99 and the measurements are positive
Warning: for the Grid it can be normal that there is negative power, because the sign negative power means export. As soon as you have import you will also see a positive value.