
| Model Number | RB-BMS |
| Communication Type | Bidirectional Closed-Loop |
| Self Consumption | < 1.5W |
| Mounting | 35mm DIN Rail / ReadyRail |
| Status Indicators | Block Status, Communication Status LEDs |
| ESP Program | Energy Storage Partner Tier 2 Certified |
| Installation | Plug-and-Play ReadyRail Integration |
| Dimensions | 3.96 x 0.874 x 2.42 in |
| Weight | 2.2 oz (62g) |

Part of The GenStar DC System Controller
Combines proven TrakStar MPPT technology with innovative ReadyRail expansion capabilities. Available in 60A, 80A, and 100A configurations.
Morningstar ReadyBMS Lithium Battery Management System
SKU MS-READYBMS-ACC
Morningstar ReadyBMS

The ReadyBMS builds "lithium DNA" directly into ReadyRail-equipped Morningstar charge controllers through true closed-loop communication with Tier 2 lithium battery manufacturers. This intelligent interface eliminates the guesswork in lithium battery charging by enabling direct communication between the charge controller and battery management system. The ReadyBMS delivers optimal charging performance without external sensors or manual configuration.
ReadyBMS Features
- Closed-Loop Battery Communication: Direct bidirectional communication with certified lithium BMS eliminates manual charge parameter configuration - the system "gets it right" automatically every time.
- Integrated Temperature Compensation: Receives temperature-compensated charging commands directly from the battery BMS, eliminating external temperature sensors and potential failure points.
- Real-Time Battery Response: Instant response to battery needs and limitations with precise battery data delivered directly from the BMS for optimal charging without exceeding safe limits.
- Intelligent Logic Integration: BMS data available for automated system decision-making and configurable logic operations within the host charge controller for advanced system automation.
- Simplified Installation: Eliminates external accessories including remote temperature sensors and battery voltage sense wiring - reducing installation complexity, costs, and common failure points.

Energy Storage Partner Program
The ReadyBMS enables Tier 2 closed-loop communication with certified lithium battery manufacturers through Morningstar's Energy Storage Partner (ESP) program. This partnership ensures optimal compatibility and performance between charge controllers and battery systems.

MorningStar ReadyBMS Battery Management System Review
The ReadyBMS represents a paradigm shift from traditional lithium battery charging approaches by eliminating the complexity and potential errors associated with manual charge parameter configuration. The closed-loop communication architecture ensures that charging algorithms are automatically optimized for the specific battery chemistry, temperature conditions, and state of health - delivering consistently optimal performance without user intervention. The elimination of external sensors and accessories significantly reduces system complexity while improving reliability. By receiving temperature-compensated charging commands and accurate voltage data directly from the battery BMS, the ReadyBMS removes common installation errors and failure points associated with sensor wiring and calibration.

Get Full Closed Loop BMS Communications with these LFP Partners
MorningStar ReadyBlock Suite of Components
GenStar MPPT Controller
- Full network integration without requiring adapters or extra equipment–Modbus and ModbusIP via 485, Ethernet, WiFi, MS-CAN connects MS Devices (proprietary), GS network information bridging.
- Powerful Load Control – built-in 30A load capability, unique for controllers in this power class
- Oversized PV Array Input capability – array input power rating @ 150% meets today’s system design needs for PV oversizing
ReadyShunt
- Provides precision battery monitoring through integrated current sensing and state-of-charge calculations
- Monitor critical metrics including energy flow (amp-hours in/out), current measurement, and battery health indicators
- Snap-in installation with simple battery connections delivers instant system visibility and monitoring capabilities
ReadyRelay
- Snaps directly into ReadyRail-equipped controllers for advanced load control and system automation
- Program custom start/stop sequences for generators and fuel cells, or schedule ON/OFF control for lights, fans, and other loads
- Simple wiring connections enable dry contact signaling and alarm conditions for comprehensive system management

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