"Doc Wattson" Amp Hour Meter & DC Ammeter

The Doc Wattson meter is our standard Watt's Up Watt meter model WU100 modified to have higher Ah and Wh limits. This helps for measuring systems that handle more energy. e.g., wind power, solar power, marine and large battery systems. I.e., it is a Higher Energy version of the Watt's Up WU100.

Doc Wattson changes compared to our standard Watt's Up model WU100 are described below.

Upon power up the meter's screen shows: "RCE HEx.x" where x.x is the version number.

Doc Wattson, R102, V2 Measurement Specifications

Measurement range changes compared to "Watt's Up" WU100 are shown in bold type.

Parameter Range Resolution Accuracy
"Watt's Up"
0-60  Volts *
0.01 V ± (1% + 0.035)
0-100  Amps ***
0.01 A ± (2% + 0.06)
0-6554 Watts
0.1 W  
0-6554 Amp hours
0.1 Ah   0-65 Ah, 0.001Ah resolution
0-650 KiloWatt hours
0.01 KWh (10 Wh)   0-6554 Wh, 0.1Wh resolution

* Using auxiliary power/battery input. Minimum is ~4.0 V without it.
*** 50 Amps continuous. Derate for wire temperatures above 70 Deg C.

Other Specifications Compared to "Watt's Up"

Other specifications are the same as the "Watt's Up" dc-amp-meter specs, except Doc Wattson :

  • Doesn't have peak Watts measurement
  • Screen's display format has Amps and Volts in same column
  • Has slightly slower (equals 0.65s) second display update rate.
  • Is only available in Onyx (black) color.

Doc Wattson R102 Specs.