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Programming Your Inverter Charger in Your Marine Power System to Lithium

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A Victron Multiplus Inverter Charger pairs very well with Battle Born lithium batteries. It possesses the capabilities necessary to ensure your marine lithium power system functions properly. To ensure that your Multiplus is properly set up for your batteries, you will need to check each of the settings. We’ll walk through the necessary settings to pair your Multiplus with Battle Born Batteries. 

How to Program a Victron Multiplus Inverter Charger 

To program your Victron Multiplus Inverter Charger, begin by removing the cover. Then, disconnect any ethernet cords plugged into other parts of the system and plug a separate ethernet cord into either of the VE.Bus ethernet ports. Using a Victron Interface MK3-USB, plug your ethernet cord into one end then plug the USB port into a computer. 

Victron app displayed on a lap top with Connor Smith

Once plugged into your computer, you can open the Victron Connect app, and you should be able to select your MultiPlus from the list of devices. By selecting the MultiPlus, you’ll be able to see a diagram showing that the device is currently on if there is AC power coming into it, and the status of your batteries.  

Victron app displayed on a lap top

To begin adjusting the settings, select the gear icon and click enable settings. You will then be prompted to input a password. This password can be provided by your Victron dealer, which is where you purchased the Multiplus.  

Before getting into the specific settings, it’s important to note that when in doubt, always contact your dealer for assistance before changing anything. If you bought your MultiPlus directly from Battle Born Batteries, it will come preprogrammed with the proper settings for your batteries.  

Victron app displayed on a lap top

Adjusting the Parameters of Your Victron Multiplus Inverter Charger


Under the first tab, labeled “General”, you will want to ensure each parameter is set to the following: 

  • System Frequency: 60 Hz. (for North America) 
  • C1 Input Current Limit: 7.5A 
  • Current Limit Overruled by Remote: ON 
  • Dynamic Current Limit: OFF (unless only a small amount of generator output power is available) 
  • External Current Sensor Connected: OFF (unless you have external hardware connected to the MultiPlus) 
  • External Battery Monitor: OFF (unless you have a secondary battery monitor connected to the MultiPlus) 


Under the next tab, labeled “Grid,” you will want to ensure each parameter is set to the following: 

  • Accept a Wide Input Frequency Range (45-54Hz.): ON 
  • UPS (Uninterrupted Power Supply) Function: OFF (unless you have critical electronics) 
  • AC Low Voltage Disconnect: 90V 
  • AC Low Voltage Connect: 100V 
  • AC High Voltage Connect: 140V 
  • AC High Voltage Disconnect: 135V 


Under the next tab, labeled “Inverter”, you will want to ensure each parameter is set to the following: 

  • Inverter Output Voltage: 120V 
  • Ground Relay: ON 
  • DC Input Low-Shutdown: 11.50V 
  • DC Input Low Restart: 12.50V 
  • DC Input Low Pre-Alarm: 12.00V 
  • Low SOC ShutDown: Disabled 
  • AES (Automatic Energy Savings): OFF 
  • Power Assist: ON 


Under the next tab, labeled “Charger,” you will want to ensure each parameter is set to the following: 

  • Enable Charger: ON 
  • Charge Current: 120A 
  • Absorption Voltage: between 14.4V and 14.6V 
  • Float Voltage: between 13.4V and 13.8V 
  • Repeated Absorption Interval: 7.00d 
  • Absorption Time: between 0.2 to 0.5 hours for every 100Ah of battery capacity (i.e., set to 2 hours for 500Ah of battery capacity) 
  • Low-Temperature Cut-Off: OFF (not necessary since Battle Born Batteries have a built-in BMS with this function) 
  • Lithium Batteries: ON 
  • Charge Curve: Fixed (since “Lithium Batteries” is toggled on) 
  • Storage Mode: OFF (disabled since “Lithium Batteries” is toggled on) 
  • Use Equalization: OFF 
  • Weak AC Input: OFF (can turn on if necessary 
  • Stop After Excessive Bulk: ON 

AC Input Control 

These settings can be left off unless you have differing inlet power requirements, in which case you can adjust accordingly. 

Enabling New Parameters 

Once all the settings have been adjusted accordingly, select the “Reset Now” option on the homepage. This will shut down the app and then shut the power off to the MultiPlus and restart it. Then, when you hear that your MultiPlus has reconnected, you can reopen the Victron Connect app. It should show that the MultiPlus is back on, and you can select to ensure the settings kicked in and everything is functioning properly.  

For a step-by-step rundown of programming your MultiPlus, check out the video below with marine electrical expert Connor Smith. As always, with specific questions or concerns, reach out to Battle Born technical specialists and they would be happy to walk through the programming with you.  

Want to Learn More? 

Check out the full Marine 101 series on our YouTube channel or through the Academy page on our website. If you have further questions or need help designing the perfect marine power system, our technical sales team would love to help! You can reach them by calling (855) 292-2831 or emailing [email protected]. 

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