When ATevo is equipped with a temperature compensation probe, it auto-adjusts output voltage applied to the battery to keep float current constant, thereby avoiding overcharging and undercharging.

The probe senses battery temperature variation and adjusts output float/equalize voltages to compensate. If battery temperature increases, ATevo’s output voltage decreases. If you are experiencing any inconsistencies in ATevo when the probe is installed, temporarily disable the TempCo Option per Section 4.11.


  • Set Float Voltage and Equalize Voltage to the values recommended by the battery manufacturer for 77 °F / 25 °C.
  • When you enter or adjust Float or Equalize voltage, the front panel meter displays the 77 °F / 25 °C value, even if the battery is warmer or cooler than 77 °F / 25 °C.
  • ATevo’s actual output voltage may be different from the set point, if the battery is warmer or cooler than 77 °F / 25 °C.
  • Use a digital multi-meter to measure the actual dc output voltage. Determine temperature at the compensation probe, and use the graph in Section 10.4 to verify that output voltage is correct.
  • If battery temperature falls below 32 °F / 0 °C, there will be no further increase in ATevo output voltage. Likewise, if battery temperature rises above 122 °F / 50 °C, there will be no further decrease in output voltage.

10.3.1. HOME Screen with TempCo Option

Additional parameters appear on the HOME SCREEN when the TempCo option is installed and enabled.

  • The LARGE FONT voltage value is the actual charger output voltage, compensated for the present battery temperature.
  • Present battery temperature (in °C) appears in small font to the right of the actual charger voltage.
  • The charger set point voltage (at 25 °C) appears in small font directly below the present battery temperature.

Last modified: 27 September 2023