How accurate is the power measurement of the dSM? digitalSTROM Support October 12, 2018 08:37 Updated Follow The specified measurement accuracy is: +/- 5 % (I ≥ 0.02 x I nominal) real power. Related articles Can digitalSTROM be used with the Apple HomeKit? How often are the energy readings updated in the dSM? Light flickers or switches off briefly when switching on/off other loads Does a digitalSTROM meter (dSM) have to be reconfigured after an exchange?