Comparison Between WatchMon 4, WatchMonPlus & WatchMonElite

Have a read about the difference between WatchMon 4, 5 & 6 supervisors and a comparison on their performance, including one with active energy transfer that will be able to move 94 Ah per day in either direction.



This article will help outline the differences and help determine the correct supervisor series for your project. 
  • Watchmon 4
  • WatchMonPlus (WatchMon 5 WM5)
  • WatchMonElite (WatchMon 6 WM6)

Power Comparison Chart

NOTE:  WatchMon 5 is now WatchMonPlus and WatchMon 6 is now WatchMonElite

Typically, the daily balancing requirement is between 100mAh and 1000mAh. This will depend on the cell age, chemistry and configuration. Balancing power beyond this level is useful to have in reserve for the initial balance and any minor fault or reconfiguration event.

Typically Automated Initial Commissioning Comparison

NOTE:  WatchMon 5 is now WatchMonPlus and WatchMon 6 is now WatchMonElite

For those wanting to assemble new cells without any conditioning process into packs, this table compares the options to avoid any manual balancing steps. New cells vary between 40 - 70% SoC% when supplied,  hence assume a 30% variance for the initial balance. After this initial event there is very little need for this level of power unless the battery pack is reconfigured. N/A is listed for scenarios beyond two(2) weeks which will needing additional assistance.

Recovery or Worst Case Commissioning Comparison

NOTE:  WatchMon 5 is now WatchMonPlus and WatchMon 6 is now WatchMonElite

The table above demonstrates the worst case scenario of a battery pack with almost all cells full and one replaced that is empty (or the reverse scenario). Hence the need to balance the full battery capacity, whilst this should not occur it can occur when recovering a battery pack with a significant variance.  

WatchMon4 + Longmon

  • Supervisor with distributed cell monitors
  • 2.2A max 1.2A typical bypass balancing
  • 28.8Ah per day for each cell
  • Available now

WatchMonPlus (WatchMon5)

  • Supervisor with cell management (from 10 to 15 series cells)
  • 500mA bypass balancing
  • 6Ah per day for each cell
  • compatible with many of the OEM shared cell balancing looms
  • Available to beta customers

WatchmonElite (WatchMon6)

  • Supervisor with active energy transfer (fixed 14 series cells)
  • 3A transfer (up to 4A discharge)
  • Up to 100Ah per day for each cell concurrently
  • Suitable for large capacity cells
  • Planned available in Mid 2020


Watchmon4 product information

WatchmonPlus (WM5) product information

WatchmonElite (WM6) product information

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