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 What does the dSM measure: Active power or apparent power? How often are the energy readings updated in the dSM? Installation and assembly of the 7'' touch panel SVEN Why are there only digitalSTROM meters dSM up to 16A? Does a digitalSTROM meter (dSM) have to be reconfigured after an exchange?