Understanding Inverter Compatibility in Home Energy Storage Systems

When selecting a battery management system (BMS) for a home energy storage system, inverter communication compatibility is an important consideration. The BMS and inverter need to use compatible communication protocols and configurations to exchange relevant battery information and support coordinated system operation.

For battery pack manufacturers, energy storage system integrators, and OEM customers, confirming compatibility between the BMS and the inverter before installation can help reduce integration issues and avoid selecting an unsuitable configuration.

DALY’s 4th Generation LK and LM Battery Management Systems are designed for home energy storage applications. Both models support Li-ion and LiFePO4 battery chemistries, 8S and 16S configurations, and CAN and RS485 communication through the interface board.

This guide introduces the communication architecture, documented inverter brand compatibility, and the information customers should provide when requesting technical compatibility verification.

1. DALY LK and LM BMS: Product Overview

The DALY 4th Generation LK and LM BMS are two home energy storage models designed for different continuous current requirements.

Both models support:

• Li-ion and LiFePO4 battery chemistries
• 8S and 16S battery configurations
• CAN and RS485 communication through the interface board
• Passive balancing
• Optional active balancing
• Parallel current limiting functionality

The primary difference between the two models is their continuous charge/discharge current rating.

The appropriate model should be selected according to the battery pack’s required current, configuration, and system integration requirements.

2. Communication Architecture: UART, CAN and RS485

The DALY LK and LM BMS use a communication architecture with separate mainboard and interface board connections.

Mainboard communication:

• Two UART communication ports.

Interface board communication:

• CAN communication.
• RS485 communication.

CAN and RS485 are the two communication interfaces documented for inverter integration on the LK and LM platform.

However, supporting a communication interface does not automatically mean that every inverter using that interface is compatible. The actual communication protocol, inverter model, firmware, and selected BMS configuration must be considered.

Customers should therefore confirm the exact inverter model and communication requirements before ordering.

3. DALY LK and LM BMS: RS485 Inverter Compatibility

According to DALY’s supplied inverter compatibility information, the following inverter brands are listed for RS485 protocol compatibility:

These brands represent the RS485 compatibility combinations covered by the supplied DALY technical materials.

For customers planning to integrate a DALY BMS with an RS485-compatible inverter, the exact inverter model and communication requirements should be confirmed before selecting the final configuration.

4. DALY LK and LM BMS: CAN Inverter Compatibility

The supplied DALY compatibility information also lists the following inverter brands for CAN protocol communication:

The compatibility list provides customers with an initial reference when evaluating inverter integration options for home energy storage projects.

Some brands, including Sacolar, Growatt, and Deye, appear in both the RS485 and CAN lists.

This does not mean that every inverter model from these brands supports both communication methods with the DALY BMS. The applicable protocol must be verified for the specific inverter model and configuration.

5. Does Compatibility with an Inverter Brand Mean All Its Models Are Supported?

No. Compatibility with a particular inverter brand should not be interpreted as universal compatibility with every inverter model manufactured by that brand.

Different inverter models may use different communication protocols, communication settings, firmware versions, and configuration requirements.

For this reason, customers should distinguish between:

• Communication interface support: Whether the BMS provides CAN or RS485.
• Protocol compatibility: Whether the selected BMS protocol matches the inverter’s communication requirements.
• Model-level compatibility: Whether the exact inverter model has a compatible communication configuration.
• System-level verification: Whether the selected BMS and inverter configuration can work together in the intended battery system.

DALY’s supplied compatibility information identifies the listed protocol combinations as having undergone parallel PACK testing and joint debugging.

The documented compatibility scope should not be extended to all models under the listed inverter brands.

For projects involving an inverter model that is not clearly covered by the supplied compatibility information, technical confirmation is recommended before purchase or integration.

6. What Information Is Required to Verify Inverter Compatibility?

To help identify a suitable DALY LK or LM BMS configuration, customers should provide the following project information.

Battery specifications

• Battery chemistry: Li-ion or LiFePO4
• Battery series configuration: 8S or 16S
• Required continuous charge current
• Required continuous discharge current

Inverter specifications

• Inverter brand
• Exact inverter model
• Required communication interface: CAN or RS485
• Available communication protocol information
• Relevant firmware or communication configuration information, if available

System requirements

• Whether multiple battery packs will be connected in parallel
• Required balancing function
• Additional functions or accessories
• Any special communication requirements

Providing these details helps the technical team evaluate the application and determine whether the proposed BMS configuration is suitable.

7. Customization for Different Home Energy Storage Projects

Different home energy storage projects may have different battery specifications, inverter communication requirements, and structural designs.

In addition to standard product configurations, DALY supports customization in the following areas:

Current specification customization

Current specifications can be discussed according to the requirements of the battery pack and application.

Communication protocol customization

Communication protocol customization is available for projects with specific inverter integration requirements. Technical feasibility requires individual confirmation.

Hardware and structural customization

Hardware and structural requirements can be evaluated according to the project design.

Software function customization

Software function requirements can be discussed and evaluated with the technical team.

OEM/ODM and branding

DALY supports brand logo customization and OEM/ODM project requirements.

For each customization request, feasibility, technical parameters, development scope, and lead time are confirmed individually.

The final product model and configuration should be confirmed before order placement.

8. Certification Documentation Support

For customers preparing product certification and market access projects, DALY can provide relevant documentation to support customer certification processes.

The specific documents available depend on the requirements of the customer’s project and the applicable certification standards.

Documentation support should not be interpreted as confirmation that the DALY LK or LM BMS has obtained any particular certification, approval, or regulatory qualification.

Customers should confirm the applicable certification requirements for their destination market and product application.

9. Frequently Asked Questions

Q1: Do DALY LK and LM BMS support both CAN and RS485?

Yes. Both models have CAN and RS485 communication interfaces on the interface board. The applicable communication protocol and configuration should be confirmed for the specific inverter.

Q2: Which inverter brands are listed for RS485 compatibility?

The supplied compatibility information lists Voltronic Power, Growatt, Sacolar, SRNE, Pylon, and Deye.

Q3: Which inverter brands are listed for CAN compatibility?

The supplied compatibility information lists Sacolar, Growatt, Victron, GoodWe, Solark, Xtender, SMA, Aiswei, Deye, SOFAR, and MUST.

Q4: Are all inverter models from these brands compatible with DALY BMS?

Not necessarily. Compatibility depends on the exact inverter model, communication protocol, firmware, and configuration. Model-level technical confirmation is recommended.

Q5: Do LK and LM support LiFePO4 batteries?

Yes. Both models support LiFePO4 and Li-ion battery chemistries, with 8S and 16S configurations.

Q6: What is the difference between LK and LM BMS?

The LK BMS supports 100A continuous charge/discharge current, while the LM BMS supports 150A or 200A continuous charge/discharge current. They also differ in optional active balancing peak current and continuous parallel current limiting.

Q7: Can DALY customize communication protocols for specific inverters?

DALY supports communication protocol customization. The feasibility, technical requirements, development scope, and lead time need to be confirmed individually.

Q8: What should I provide when requesting an inverter compatibility check?

Please provide your inverter brand, exact model, communication interface, battery chemistry, series configuration, required current, and parallel battery requirements.

10. Contact DALY for Home Energy Storage BMS Solutions

Selecting a suitable BMS requires matching battery specifications, current requirements, communication protocols, and inverter configurations.

The DALY 4th Generation LK and LM home energy storage BMS models provide 8S and 16S configurations for Li-ion and LiFePO4 applications, with CAN and RS485 communication interfaces and different continuous current options.

For battery manufacturers, energy storage system integrators, distributors, and OEM/ODM customers, DALY provides product configuration consultation and customization support.

Contact DALY with your project specifications to discuss a suitable BMS configuration.

To help us evaluate your project, please include:

1. Battery chemistry and series configuration.
2. Required continuous charge/discharge current.
3. Inverter brand and exact model.
4. Required CAN or RS485 communication protocol.
5. Parallel battery requirements.
6. OEM/ODM or customization requirements.

DALY’s team can review the project details and confirm the appropriate product configuration and technical feasibility.

DALY – Battery Management System Solutions for Home Energy Storage Applications.