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| Model Number | RB-RELAY |
| Relay Type | SPDT (Single Pole Double Throw) |
| Number of Relays | 2 Independent Relays |
| Rated Switching Voltage | 250 VAC / 220 VDC |
| Rated Current (AC) | 6.0A @ 250 VAC |
| Rated Current (DC) | 6.0A @ 30 VDC / 0.12A @ 220 VDC |
| Contact Configuration | NO/NC/Common |
| Self Consumption | < 0.3W |
| Status Indicators | Block Status, Relay A/B Operation LEDs |
| Mounting | 35mm DIN Rail / ReadyRail |
| Compliance | TAA Compliant |
| Weight | 3.3 oz (93.5g) |
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 ReadyRelay Advanced Load Controller
SKU MS-READYRELAY-ACC
Morningstar ReadyRelay Load Control
The ReadyRelay adds advanced load control and signaling functionality to ReadyRail-equipped Morningstar charge controllers through dual high-quality SPDT relays. This intelligent relay module enables automated control of generators, fuel cells, lighting, ventilation fans, and alarm systems based on real-time system parameters, time-based schedules, or manual commands.
ReadyRelay Features
- Generator & Fuel Cell Control: Automated start/stop control for backup power sources with seamless integration to Automatic Generator Start features for intelligent backup power management.
- Programmable Load Control: Toggle relays based on real-time operating variables, time-based schedules, manual commands, or complex logic configurations for sophisticated energy management.
- Intelligent Alarm Signaling: Dry contact signaling for alarm conditions based on precise system parameters with user-defined logic using real-time information including clock and calendar data.
- Energy Balance Optimization: Smart load prioritization and shedding capabilities enable tighter control over system energy balancing through intelligent load management and automated switching.
- User-Replaceable Contacts: Field-replaceable relay contacts accessible from the top without removing the ReadyBlock from the rail, reducing service calls and maintenance downtime.
ReadyRelay Load Control Applications
- Generator and Fuel Cell Management: Automated start/stop sequences for backup power sources based on battery voltage, SOC, time of day, or manual override commands. Integrates seamlessly with existing Automatic Generator Start systems.
- HVAC and Ventilation Control: Intelligent control of exhaust fans, ventilation systems, and heating equipment based on temperature, humidity, or battery capacity conditions for optimal off-grid comfort management.
- Lighting and Security Systems: Automated lighting control for area illumination, security lighting, or emergency systems with programmable schedules and override capabilities for 24/7 off-grid operations.
MorningStar ReadyRelay Advanced Load Controller Review
The ReadyRelay transforms basic charge controllers into sophisticated energy management systems through intelligent relay control capabilities. The dual SPDT configuration with 6A switching capacity handles most off-grid automation requirements while the user-replaceable contact design significantly reduces long-term maintenance costs compared to sealed relay modules requiring complete replacement.The integration with real-time system data enables advanced automation strategies that optimize energy usage patterns and extend battery life through intelligent load management.
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
ReadyBMS
- Integrates lithium battery intelligence through true closed-loop communications with Tier 2 battery manufacturers
- Currently supports two-way communication with Discover and PylonTech LiFePO4 batteries for optimal charging profiles
- Part of Morningstar's Energy Storage Partner program with additional battery partnerships continuously added
Different solar panels, PV mounts, storage, & inverter systems available at low wholesale prices
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