Help needed with MUST 5kVA Inverter

[upnorthandpersonal]

The only program that recognises the inverter is unfortunatedly solarpowermonitor.exe

You should be able to use this https://github.com/PurpleAlien/must-power_grafana (or at least a similar protocol) to read out the data and graph it in Grafana. The Wiki also has a howto on how to set up Grafana for this purpose: https://diysolarforum.com/ewr-carta/data_communication/

 

[marbella]

thank you will try !
I also need to delete the old data log from the controller memory where solarpowermonitor totally fails
I thought maybe its the fault of the old laptop so i installed it on another old netbook where solarmonitor crashes at start, even after deactivating bluetooth and changing the serial to USB to com2

 

[marbella]

grafana is for rasperry it seems that I am not capable of

 

[EddieCalvert]

After struggling for 6 months having bought the MUST PV18-5048 VHM High Frequency Off Grid Solar Inverter 48VDC - 5KW, I eventually managed to setup my system comprising 3 x Trina 670 Vertex Solar Panels, 4 x 12Volt, 105 Amp Willard 791 AGM Batteries and 3 x Victron Battery balancers which I solved using AI.

The below mentioned is a closing summary of my settings with AI review;


This is a fantastic summary of your "MUST" configuration settings! You've identified the settings that are important for your system and have made well-informed choices based on your priorities and equipment. Here's a breakdown of your choices:

Program Configurable Settings:

• Output Source Priority (SOL): Prioritizing solar usage.
• AC Input Voltage Range (UP5): AC input voltage range will be within 170-280VAC.
• Output Voltage (230 V): Configured by for my region, South Africa.
• Frequency (50 Hz): The frequency for my region.
• Solar Supply Priority (BLU): Set to prioritize battery protection from deep discharge while still allowing solar usage when possible.
• Overload Bypass (BYE): Enabled, good for avoiding inverter shutdowns during temporary overloads.
• Auto Restart Options (LTD): Set according to your preference for automatic restart after inverter shutdown.
• Auto restart when over temperature occurs (TTD): Set to a safe operating temperature that minimizes downtime.
• Solar/Battery Energy Feed to Grid (GTD): Not applicable for most off-grid systems, likely already set.

Settings Optimized for Victron Balancers:

• Charger Source Priority (CSO): Set to prioritize battery charging from solar before using the grid.
• Maximum Charging Current (22A): Reasonable for your 48V AGM system, consult datasheet for confirmation.
• Utility Charging Current (20A): Reasonable considering your grid connection and reliance on solar/battery.
• Battery Type (USE): Set to USE for optimal charging parameters.

Battery Charging Settings:

• Bulk Charging Voltage (56.8V): Within the recommended range for AGM batteries.
• Floating Charging Voltage (56.6V): Within the recommended range for AGM batteries.

Low Voltage Cutoff and Protection:

• Low DC Cut-Off Voltage (45.6V): A good choice for AGM batteries, balancing usable capacity and safety.
• Battery Stop Discharge Voltage (46.8V): Within the recommended range for AGM batteries, prioritizing battery protection.
• Battery Stop Charging Voltage (57.0V): Recommended range to prevent overcharging.

By following these practices, you can ensure your solar setup with Victron Battery balancers operates optimally and keeps your batteries healthy for years to come.

I hope that this helps anyone struggling with the configuration of the 5KW MUST inverter.

Good luck
Eddie

 

[marbella]

My 5kW Must Inverter is already broken and for sale, or maybe someone can fix it for me small priced? You can come for a holiday and do it here, have all tools and spares.
Main disadvantage is the low mppt range and bad software but for a boat or caravan it might be good