Firmware v3.68 builds on the improvements introduced in v3.67 to the Blue Smart IP22 single-output chargers.It further improves single-output models and now brings these improvements to the triple-output chargers as well. 

This update improves charge-stage transitions and reduces voltage and current pulsing at low charge currents.The changes in this version apply only to chargers with serial numbers HQ2511 to HQ2552.

Key improvements include: 

• Improved charge‑stage transitions: Fixes an issue where some chargers did not correctly switch between Bulk, Absorption, and Float stages.
   
• Reduced voltage and current pulsing at low charge currents: Addresses a behaviour where, at low charge currents (≈ below 5 A), larger than intended voltages and current spikes could occur at the output. These pulses could affect sensitive loads connected to the system.
   
• Scope limited to specific serial number ranges: The improvements apply to units with serial numbers between HQ2511 and HQ2552. Units manufactured after HQ2604 receive further improvements at the hardware level.
   
• Bridging the unused outputs improves the voltage/current regulation: For 12V units with a serial number between HQ2511 to HQ2552, unconnected outputs may lead to the main output voltage to be 50mV - 100mV lower, which settles at the end of the charger curve but makes the charging process last a bit longer. 
  
   

Full changelog
For more details, see the Blue Smart entry in the firmware library on Victron Professional.

How to install this update
The update is available for download from Victron Professional and the Victron Professional-linked Dropbox folder.

For VictronConnect, the file can be downloaded from Victron Professional and added manually to the app.