Download the latest firmware update for the Prostar MPPT charge controller and the MSLoad utility software below. This firmware update contains all fixes to date. Only the latest firmware update needs to be programmed into the Prostar MPPT.

NOTE: A Morningstar USB to Meterbus (model: UMC-1) is required to load new firmware into the Prostar MPPT. Consult your Morningstar dealer for more information.

Release Notes

 

ProStar MPPT Firmware version 34

(Release Date: Web – 3/1/23)
(Release Date: Production – N/A)

New
  • Battery charging profiles 1-4 no longer have max. regulation voltage of 15V
Fixes
  • Battery HVD LED Indication Sequence

 

ProStar MPPT Firmware version 33

(Release Date: Web – N/A)
(Release Date: Production – 11/23/22)

Fixes
  • Modbus reporting of DIP switch 4 and 6 positions
Enhancements
  • Improved charging regulator stability

 

ProStar MPPT Firmware version 31

(Release Date: Web – N/A)
(Release Date: Production – N/A)

New

  • Increased maximum Load HVD-HVR to 16.5 V/16.4 V, respectively
Fixes
  • Updated FW for compatibility with Hardware Version 1.o7
  • Fixed access to Modbus coils
Enhancements
  • Updated so that daily minute counters for Absorption, Equalization and Float stages are reset when other counters and daily values are reset, i.e., when daily log is written
  • Updated meter to include battery HVD-HVR programming

 

ProStar MPPT Firmware version 28

(Release Date: Web – N/A)
(Release Date: Production – N/A)

Enhancements

  • Updated to support v1.5 hardware

 

Prostar MPPT Firmware version 27 

(Release Date:  Web – 11/25/20)
(Release Date:  Production – Web Download Only)

New
  • Load High Voltage Disconnect (LHVD) Disabled by Default
  • Low Voltage Disconnect (LVD) Defaults to 11.5V for all Battery Types
  • Low Voltage Reconnect (LVR) Defaults to 12.6V for all Battery Types
Fixes
  • Display and Directional Arrow Freezing
Enhancements
  • Improved MPPT Sweep Efficiency
  • Improved Duty Cycle Efficiency
ProStar MPPT Firmware version 19

(Release Date: Web – 8/14/19)
(Release Date: Production – TBD)

Fixes
  • Fixed communications lockup and meter freeze on -M models
ProStar MPPT Firmware version 14
Enhancements
  • feature: added user configuration so that when EEPROM written, Load does not disconnect
  • feature: full translations for French, German, Spanish
ProStar MPPT Firmware version 12
Fixes
  • RM-1 fixes: floating->fixed conversion, ‘Ic’ vs ‘Ib’ current, Vb min/max, Ah scaling
  • VEQ/LHVD custom range to include disable (0V)
  • Meter main screen ‘level bars’ now working
ProStar MPPT Firmware version 11.0
Fixes
  • Fixed issues with lighting and/or logic when programmed from the onboard meter
  • Fixed issue with illumination of navigation buttons on metered versions
ProStar MPPT Firmware version 10.0
Fixes
  • Fixed issues with lighting mode
  • Fixed meter screen blank outs and contrast issue
  • Misc meter usability issues resolved
  • Improved meter navigation