Renogy B0BMK5LTD2 User Manual

The Renogy B0BMK5LTD2 is a high-performance solar charge controller designed for off-grid solar power systems, featuring MPPT (Maximum Power Point Tracking) technology, LCD display for real-time monitoring, multiple battery type compatibility (Sealed, Gel, Flooded, Lithium), load control, temperature compensation, and comprehensive protection features. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

Features at a Glance

Key components: MPPT charge controller, LCD display, PV input terminals, Battery terminals, Load terminals, Temperature sensor port.

Installation

Unpack and inspect contents. Choose appropriate location.

1. Mount controller: Select dry, well-ventilated location away from direct sunlight.
2. Connect battery first: Ensure correct polarity (positive to positive, negative to negative).
3. Connect solar panels: Connect PV cables to solar input terminals.
4. Connect load: Connect DC load to load terminals if applicable.
5. Connect temperature sensor: Plug into designated port for accurate temperature compensation.

WARNING! Always connect battery before solar panels. Ensure all connections are tight and secure.

First-Time Setup

Power on controller; follow LCD display prompts.

1. Set battery type: Press SET button, navigate to battery type menu, select appropriate type.
2. Configure charging parameters: Adjust bulk, float, and equalization voltages as needed.
3. Set load control: Program load timing (timer or dusk-to-dawn mode).
4. Calibrate temperature sensor: Ensure sensor is properly connected and reading accurately.
5. Save settings: Press and hold SET button for 3 seconds to save configuration.

CAUTION! Use appropriate wire gauge for connections. Do not exceed maximum input voltage.

Specifications

• Model: Renogy B0BMK5LTD2
• Maximum PV Input Power: 520W (12V system) / 1040W (24V system)
• Maximum PV Input Voltage: 100V DC
• Rated Battery Voltage: 12V/24V Auto
• Maximum Charging Current: 40A
• Maximum Load Current: 20A
• USB Output: 5V/2A
• Communication: RS232 Port
• Operating Temperature: -35°C to +55°C
• Protection Degree: IP65
• Dimensions: 185 x 135 x 50 mm

Controls and Settings

Access settings via front panel buttons. LCD Display shows: PV voltage, battery voltage, charging current, load status, error codes.

Buttons: SET (enter menu/navigate), ESC (exit/cancel), ON/OFF (load control).

Menu Structure: Battery type (SEAL, GEL, FLOOD, USER, LI), Charging parameters (Bulk, Float, Equalization), Load control (Manual, Timer, Dusk-to-Dawn), System settings (Language, Backlight timeout), Information display (PV input, Battery status, Load status).

Connecting Devices

Battery: Use appropriate cable size based on distance and current. PV: Connect solar panels in series/parallel as needed. Load: Connect DC appliances.

1. Turn off all power sources before making connections.
2. Use proper connectors and ensure secure connections.
3. Connect in correct order: Battery → PV → Load.
4. Check polarity before powering on.

Tip: Use circuit breakers or fuses between controller and battery for added protection.

Operation Modes

Supports multiple charging stages for optimal battery health.

1. Bulk Charging: Constant current charging until battery reaches bulk voltage.
2. Absorption Charging: Constant voltage charging to fully charge battery.
3. Float Charging: Maintains battery at optimal voltage to prevent overcharging.
4. Equalization Charging: Periodic overcharge to balance battery cells (for flooded batteries only).
5. Load Control: Manual, timer, or light control modes available.
6. USB Output: Always available when battery is connected and charged.

WARNING! Do not disconnect battery during charging. Equalization only for flooded batteries.

Protection Features

Overcharge Protection: Automatically stops charging when battery is full. Over-discharge Protection: Disconnects load when battery voltage is too low. Short Circuit Protection: Automatically shuts off output during short circuit. Reverse Polarity Protection: Protects controller from reverse connection. Over Temperature Protection: Reduces charging current when controller overheats.

Care & Maintenance

Regular inspection recommended. Keep controller clean and dry.

1. Monthly: Check all connections for tightness and corrosion.
2. Quarterly: Clean dust from ventilation openings.
3. Annually: Verify settings and update firmware if available.
4. As needed: Check battery water level (flooded batteries only).

CAUTION! Do not open controller casing. No user-serviceable parts inside.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. CE Certified: Meets European safety standards. RoHS Compliant: Free of hazardous substances. Copyright © 2023 Renogy; all rights reserved. For technical support, visit www.renogy.com or contact 1-800-330-8678.

Troubleshooting

Reset: Disconnect all power sources for 5 minutes, then reconnect battery first.

Service: 1-800-330-8678; www.renogy.com