How to Control a SolaX Hybrid Inverter/Charger with a WatchMon

Here are the steps to configure the SolaX Hybrid Inverter/Charger to the WatchMon Supervisor. 

CAUTION:  The example below has values shown for a demo LiFePO, 4 cell pack, please ensure that you adopt the values suitable to your application and comply with the battery suppliers recommendation.

Please be advised that for a number of reasons some of our customers have switched to different inverters after their purchase.

Step 1 - Install communication cable to charger via CAN1 port on WatchMon.

WatchMon1   (Same procedure as the WatchMon4 but the screw-terminal / connector looks different).  Add a 120 ohm terminating resistor on WatchMon pin 5 & 6.

Step 2 - Install communication cable to Solax BMS socket (Extract from Solax Manual)

Typical Cat 5 cables have different colour pin combinations to the Solax manual.

Solax  RJ45 pin 1 (typically Green/White)connects to Can-H WatchMon
Solax  RJ45 pin 2 (typically Green) connects to Can-L WatchMon

NB: Using a CAT5 Ethernet Cable, strip back the cable and connect to the pins identified above.

Step 3 - Navigate to Hardware, then Integration tab.

Step 4 - Select Canbus protocol to "SolaxPowerSK" and Save.

Step 5 - Navigate to Control Logic, then Charging tab.

Step 6 - Adjust the charging control logic to suit the application.

Notes:

  • Low power must be enabled.
  • Cell Hi Cutout should be above the CellMon bypass voltage threshold as a safe guard target.
  • Low power current should suit the bypass capability of CellMon.
  • When the bypass current is above Initial, it will trigger the system to low power.
  • When the bypass current for all cellmons is above Final, the system will complete charging cycle.

Step 7 - Navigate to Hardware, then CellMon tab.

Step 8 - Adjust the CellMon Bypass Voltage, to suit the application.

Note: Make sure to "Device Sync" the changes to the CellMons.

Step 9 - Navigate to the Remote tab on the Control Logic screen. 

Step 10 - Adjust the remote charging target to suit the application.

Notes:

  • Scaling must be 10, for both voltage and current.
  • Low power must be enabled on charging tab.
  • Low power current should suit the bypass capability of CellMon.
  • Charger voltage target needs to be sufficient for all cells to reach bypass threshold.

Step 11 - Adjust the remote discharging targets to suit the application.

Notes:

  • Scaling must be 10, for both voltage and current.
  • Do not run low power mode on discharging tab.
  • Control logic discharge voltage cutout should match the remote target.

Step 12 - Navigate to Telemetry, then Live Stats to observe system operation.

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