Calibrate the EC480 battery amps

Calibrate the EC480 battery amps

The EC480 (or EC300) control panel, connected to the EC500 PSU has the ability to measure and display the current (A) going into or out of the active (Selected) battery. Positive Current (+) indicates charging of the battery whilst Negative Current (-) indicates discharging of the battery.

The EC480 control panel also displays the approximate remaining capacity of the leisure battery (AH). As the battery is charged this gauge will increase and as the battery is discharged it will reduce. This is a useful indication of useable battery power, however is only a guide and you should always take note of the actual battery voltage (See table below)


Capacity % (Amp Hours) - EC480 Control Panel ONLY

The AH reading is not a reading or measurement from the battery, it is purely a calculation based on battery size, the charging current into the battery and the current drawn from the battery and as such is reliant upon a correctly calibrated ammeter and the correct sized battery being programmed into the control panel (See Below).

This reading will also be inaccurate if the leisure battery has been removed from the van and charged independently, or an additional\larger battery fitted. In this case a programming option is available to reset the AH Start Point. To check\change the programming options follow the below instructions:

  1. Turn off the 12V Power to the Van.
  2.  Scroll to the manufacturer logo screen (E.g. Autotrail).
  3. Press and Hold the Up and Down Scroll arrows to enter the programming mode.
  4.  Use the scroll keys navigate the menus a) Battery Size (Set to Appropriate Size) b) AH Start Point (Set to Estimated Battery Capacity, I.e. 100% when fully charged).
  5.  Use the Select ( < ) key to adjust the settings.
  6. Scroll to "Exit Advanced" and Use the Select key to exit.

Calibration of the Ammeter - EC480 / EC300 Control Panels

The ammeter is within the EC500 PSU and requires calibration to the EC480 (Or EC300) control panel at initial install. Following this initial calibration, you may need to re-calibrate if the reading is inaccurate, one cause of an inaccuracy could be due to a replacement control panel being installed. To re-calibrate follow the below instructions:

  1. Turn off the 12V Power to the van.
  2.  Turn off the Battery Charger.
  3.  Where possible solar panels should be covered.
  4.  Scroll to the active battery screen (Battery Current Screen on EC300).
  5.  Press and hold the select button (<) to start the calibration process. 6) Note the "A" \ "Batt Amps" Reading reset to 0 7) Once calibrated you should see a more accurate display of the current. > < ) to start the calibration process.
  6. Note the "A" \ "Batt Amps" Reading reset to 0.
  7.  Once calibrated you should see a more accurate display of the current.

Note: Best operation of this functionality is achieved with V131 Control Panel and PSU, A programmer is available to update to this version.

    • Related Articles

    • The battery current reading seems incorrect on my EC620 control panel

      If the battery current reading seems incorrect on your EC620 control panel, you may need to calibrate the current sensor in the PSU to the control panel in order to get a true reading.​ Ensure the mains charger is switched off at the EC600 PSU.  If ...

    • The battery current reading seems incorrect on my EC700 / EC800 control panel.

      If the battery current reading seems incorrect on any of the listed control panels, you may need to calibrate the current sensor in the PSU to the control panel in order to get a true reading. Ensure the mains charger is switched off at the ...

    • The battery current reading seems incorrect on my EC325 / EC328 / EC300 control panel.

      If the battery current reading seems incorrect on any of the listed control panels, you may need to calibrate the current sensor in the PSU to the control panel in order to get a true reading. All of the above panels share the same layout and menu, ...

    • I would like to fit a different AGM battery

      For systems using the PX300 charger (EC400/EC400+, EC500, EC600, EC700, EC800, & EC328): Whilst we do not recommend any specific make or model of battery, the PX300 charger used in these systems is compatible with the majority of good quality AGM ...

    • Leisure Battery Testing

      Introduction This guide has been put together to help test and diagnose cases where a caravan or motorhome user is experiencing leisure batteries discharging or not lasting as long as expected and refers to electrical systems supplied by Sargent ...