OVERVIEW

This document provides information on the integration of Rolls LFP ESS batteries with Victron Energy systems via CAN-BUS communication. The integration covers the following components:

• Cerbo communication centers
• MultiPlus inverter chargers
• Quattro inverter chargers
• MPPT Charge Controllers
• BMV 700 Series Battery Monitor
• Venus GX / Color Control GX
• VE Configure Software
• VictronConnect Bluetooth application

Victron Energy Reference Documents:                                        

• Quattro Inverter Charge Manual
• Multi Inverter Charge Manual
• SmartSolar Charge Controller Manual
• Venus GS (VGX) / Color Control GX (CCGX) Manual
• BMV 700 Series Battery Monitor Manual

Rolls LFP Reference Documents:

• ROLLS S48-100LFP ESS DATA SHEET
• ROLLS S48-100LFP ESS BATTERY OPERATING MANUAL

Visit the links above, or rollsbattery.com for the most recent version of published documents.

Certain configurations, installations, services, and operating tasks should only be performed by qualified personnel in consultation with local utilities and/or authorized dealers. Qualified personnel should have training, knowledge, and experience in:

• Installing electrical equipment
• Applying applicable installation codes
• Analyzing and reducing hazards involved in performing electrical work
• Installing and configuring batteries

No responsibility is assumed by Rolls Battery for any consequences arising out of the use of this material.

BATTERY OPERATING LIMITS

Maximum Battery Operating Limits

The battery should not be operated outside these operating limits. The BMS will open its internal switch and disconnect the battery if any of these limits are exceeded. 

Note: Intentional bypassing of a BMS to operate a battery outside its maximum and minimum limits voids warranty and may lead to safety concerns.

Minimum Battery Capacity

Using large solar arrays with battery banks that are too small can exceed the operating limits of the battery, potentially triggering over-current protection in the Battery Management System (BMS). Battery capacity must be sized to accommodate the maximum charge current of the system, or the charging devices must be adjusted to charge below the operating limit of the installed batteries. This value is determined by summing the charge capacities of all inverter/chargers and solar charge controllers in the system. Additionally, the battery peak capacity must be sized to support the surge requirements demanded by the load connected to the inverter. Ensure that the sum of all inverter peak power values matches the sum of all battery peak current values.

ROLLS LFP ESS CLOSED LOOP INTEGRATION WITH VICTRON ENERGY EQUIPMENT

Victron communication device capable of BMS-Can operation at 500k (this may prevent you from using VE.Can if your device only has one CANbus interface, VE.Direct will be unaffected), and a Compatible Rolls Battery Device, like the S48-100LFP ESS.

In case of confusion, refer to the manual for the Victron energy device you are using, which may have specific ports, or setup requirements. Typical setup is as follows for devices like the Cerbo GX. 

Ensure the physical connection steps have been followed, and all connected S48-100LFP ESS Devices are also connected over RS485 and properly addressed. 

The following steps are physically performed on the system devices or related to their interconnectivity.

1. Ensure the S48-100LFP ESS BMS is activated by holding the RESET button for 2 seconds. The SOC and RUN lights will be on. 

1. Ensure Rolls Batteries are connected over RS485, and properly addressed for external CANbus communication (not for RS485 serial access). See the table on the next page.
2. Connect the host device (DIP 0000) to the VE.Can or BMS Can port of the communication hub using Victron Cable A.
3. Connect Rolls battery terminals (+ and -) to Victron inverter and communication hub power [Red and Black cable]
4. Ensure the breaker is set to the “ON” position on each parallel-connected battery.
5. Connect Victron components to the VE.Bus and VE.Can networks as applicable. To use with a Rolls S48-100LFP ESS battery, or other Rolls products after 2023, you will need a Cerbo-S GX, or other VE.Can or BMS-CAN enabled product, capable of 500k Can communication. 
6. Connect Cerbo or other communication hub to Rolls S48-100LFP ESS battery (CAN-BUS).
   1. Use Victron Cable A to properly connect the CAN-bus signals. 

The following Setup steps are performed on the communication hub of the Victron device.

1. Set Cerbo (or other communication hub) to proper speed and communication type: 
   1. Settings → Services → VE.Can port → CANbus Profile → CANBus BMS (500 kbit/s)
   2. Note: This will not be required if using a BMS-CAN port.
2. Ensure connection is correct / proper cable in use: 
   1. Network status → packets coming through.
3. Rename Storage Device: 
   1. Device list → See battery listed above inverter → click on battery → Device → Name → Rename to match system.
4. Ensure parameters were properly set: 
   1. Battery → parameters → check the following parameters (current is per battery):

Note: If system is idle, battery may not report discharge directly if discharge is below 1A.

Note: Limits represented here are set to 10A below the recommended battery limits, as the inverter should trip first. This follows best practices.

Note: VE.Can and BMS-Can cannot be combined on the same bus. If you wish to use both, they require a GX device with two separate buses, each with 2 RJ45 ports - 4 CANbus ports in total. 

PARALLEL PACK SELECTOR SWITCH 4-DIP

When multiple battery packs are connected in parallel over CANbus, each battery pack should be properly addressed through the DIP switches on the front of each battery. Depending on how many batteries are connected, you will use a given amount of DIP switches up to 16, but the first address will always be first, the second address will always be second, etc. Each battery has 4 DIP switches. See the figure below for addressing each pack. For CANbus configuration with external devices like Victron communication hubs, the CANbus cable should be connected to the first, “HOST” address, or 0000. 

ROLLS LFP DESKTOP SETUP

Rolls S48-100LFP ESS Devices should be configured for Victron system out of the box, but in the case that you need to set it manually, you can do so easily using the Rolls LFP Desktop App, and the setup steps below.

Physical Se

 Steps to setup are:

1. Ensure the S48-100LFP ESS BMS is activated by holding the RESET button for 2 seconds. The SOC and RUN lights will be on. 
2. Address the DIP switch on the S48-100LFP ESS unit(s)
3. If only one connected, address to Position 1 (See Figure 1). 
4. Connect the included RJ45-DB9 cable to one of the RS485 ports on the front of the battery. 
5. Connect the DB9 cable end to the RS485 to USB Serial adapter. 
6. Ensure the USB Serial adapter appears in device manager and the proper COM port is reflected in the software, below.
7. Connect Rolls battery terminals (+ and -) to Victron MultiPlus (+ and -) [Red and Black cable]
8. Ensure the breaker is set to the “ON” position.
9. Connect Victron components to the VE.Bus and VE.Can networks as applicable. To use with a Rolls S48-100LFP ESS battery, or other Rolls products after 2023, you will need a Cerbo-S GX, or other VE.Can or BMS-CAN enabled product, capable of 500k Can communication. 
10. Connect Cerbo or other communication hub to Rolls S48-100LFP ESS battery (CAN-BUS).
11. Use Victron Cable A to properly connect the CAN-bus signals. 
12. Connect HMI, or PC to Victron network to monitor entire system. 
13. Launch Rolls LFP Desktop App on your PC to configure CAN-bus mode.
14. Note: configuration is only required if another configuration mode was overwritten. Rolls S48-100LFP ESS units’ default to compatibility with Victron BMS-CAN.

Software Setup – Rolls LFP Desktop

Within the computer software Rolls LFP Desktop, after connecting to the battery…

1. Select the appropriate COM port on your computer.
2. Select a baud rate of 19200
3. Select “Pack 1” from the righthand menu in Rolls LFP Desktop. (Or other, if directly connecting to another battery at a different address.
   1. Double check that the DIP switch is properly addressed to match. 
4. Select “Connect” and wait for connection to be established (1-3 seconds).
5. The battery information will be displayed, 
6. Configure the unit to communicate with Victron devices.
   1. Click CAN on the top ribbon.
   2. Double click “VCTR” to configure for Victron.
   3. Wait for pop-up confirming updated software.
7. Ensure that the “BMS Information” Section at the bottom of the screen has updated to reflect the Victron CAN-bus Protocol. 

ROLLS LFP ESS OPEN LOOP INTEGRATION WITH VICTRON ENERGY EQUIPMENT

Device Settings.

The settings in this document are for an off-grid application with Open Loop configuration using Victron Energy equipment. 

VE.Configure Device Settings [Open Loop]

The charge and discharge settings for Rolls LFP batteries in an Open Loop configuration are set up manually using Victron’s VE.Configure software for Quattro/Multiplus inverter chargers using the following recommended parameters. After setting the parameters, ‘send’ all parameters to the inverter and CCGX. Restart the CCGX after completion. Refer to Victron product manuals for the safe and correct operation of Victron products.

1. Enabled is recommended.
2. Used to enable and define the general display of voltage based SoC. However voltage based SoC accuracy is low with Rolls LFP battery and generator start stop control is not recommended using this feature as the SoC trigger.  A Victron BMV Battery Meter is recommended for triggering generator start stop control with Rolls LFP Battery based on measured SoC.
3. The lowest operating voltage allowed, increase voltage as required.
4. Restart voltage after DC input low shut-down, recommended to be set to the minimum value (minimum varies according to the DC Input low shut-down value).
5. 51.0 V value (approximately 15% SoC) will trigger low battery warning, increase or decrease as preferred.
6. The recommended minimum is 1.0 hour. A longer period of time may be required to compensate for multiple batteries to achieve a smooth completion of charge.
7. Duration of maximum Float period or Interval between a repeated absorption cycle.

Note: Confirm the Float Voltage after completing the installation of any Victron ‘Assistants’. If necessary, reset the Float Voltage to 26.8 V / 53.6 V

VE.Direct Device Settings [Open Loop]

The settings for Rolls LFP batteries in an Open Loop configuration with Victron VE.Direct MPPT are as follows below.  This section presumes familiarity with VictronConnect (Bluetooth App) used to configure, monitor and diagnose Victron MPPT products which feature Bluetooth, or are equipped with a VE.Direct Port. 

Refer to Victron product manuals for the safe and correct operation of Victron products.  

1. May be set to lower value if necessitated by charger controller size.
2. Duration of absorption period after the bulk charge interval. The recommended minimum is 1.0 hour. A longer period may be required to compensate for multiple batteries to achieve a smooth completion of charge.

Victron BMV 700 Battery Monitor Settings [Open Loop]

The settings for Rolls LFP batteries in an Open Loop configuration with a Victron BMV 700 Series Battery monitor are as follows below. Set up is established using the +/- and ‘Select’ buttons on the face of the BMV 700 Series Battery Monitor. 

Refer to Victron product manuals for the safe and correct operation of Victron products. 

Victron CCGX Set Up

To optimize performance of a Victron system the following items need to be manually set using the CCGX, Ekrano, or other Victron Communication Centre product.

Navigate from the Device List screen > Settings > System Setup. 

From the System Setup menu, scroll down to select each item and then set as indicated.