RluxRV M3333ND Solar Charge Controller

User Manual

1. Warnings and Tools Icon Chart

2. Safety Tips

• It is very important to review this manual thoroughly before attempting installation.
• Beware of any nearby electrical equipment that may interfere with installing this device.
• And please don't plug in any AC source to this DC-DC product, or it may cause a fire or burn to the device.
• Solar panels may generate high voltages and currents, and please make sure your solar panels would be completely covered from sunlight during installation. It is recommended that the installation is performed by qualified electricians.
• Contact of wiring to this device may generate sparks, so please put on proper insulation wear while installing this device.
• To avoid damage to the battery or controller, use proper fuses in wiring. Please contact RluxRV if you need help with fuse sizing.
• Always keep children away from this device.
• Be certain to use the correct gauge of wire, see below for a table of recommended wire size for various current loads.

• RluxRV suggests no more than 5A's current for each square millimeter's wire core, e.g., for current of 10A, at least you should use 2 mm² wire.

3. Product Features

Thank you for choosing RluxRV's product. This device is a DC-DC intelligent charger/ controller for vehicle or similar systems with dual batteries. Applied in a dual battery system, this charger combines respective advantages of motor (ordinary/smart alternator) power generation and photovoltaic power generation.

In use of vehicles, the main/service battery is prior to being charged by the solar input as the default settings. The auxiliary/starter battery would get into charge automatically, after the starter battery was fully charged. Users can also set the charge priority between main & auxiliary batteries in the controller (through the external remote LCD screen). The auxiliary battery could enforce to charge the main battery by settings in the controller, or through the IGN alternator.

The controllers have features as follows:

• The external input can supply power to the battery through BUCK-BOOST. The external power sources, like alternator or power supply, are able to charge both main & auxiliary batteries, through a voltage buck-boost circuit.
• Supports dual battery system charge (BAT 1/main/service battery & BAT 2/ auxiliary/starter battery). If only one battery would be put in use, then please connect it in the main/service battery port as default settings.
• The charge system would identify PV or external power input as the charge sources, and distribute them to charge both main & auxiliary batteries automatically.
• Both PV and external power sources could be used for charging the dual battery system, and the user can also enforce the charge priority by setting in the remote display.
• By continuously checking solar panel power output changes, the controllers employ multiple MPPT charge algorithms in combination to boost charging efficiency in different weather and temperature conditions.
• If the remote display was connected in the controller, the user could also operate the charge system in App through mobile phones via Bluetooth.
• Charging modes available for most common deep-cycle battery types in the market, including AGM (sealed lead acid batteries/SLD), GEL, Flooded, and Lithium Auto recognition of 12V/24V battery system voltage.
• Supports recording of system running data for up to 300 days, compatible with monitoring App through iOS and Android.
• Industrial grade design with full ranges of electronic protections on PV and battery in the controller. (optional accessory, not in the standard package list).

4. Device Diagram

5. Mounting Instruction

5.1 Wire preparation.

A diagram shows the process of preparing wires for connection, including crimping terminals.

5.2 Remove the mounting cover plate.

A diagram illustrates removing the mounting cover plate of the controller.

5.3 Connect the main wire.

The negative pole of the main wire is the common negative pole, so it can be installed in a random order. A diagram shows the connection of PV+, B1+, B2+, Ext+ and negative terminals.

5.4 Connect the communication or the secondary line.

A diagram shows the connection of IGN, CAN, BVS, TEM1, TEM2, and COM ports, along with RS485 pin details.

5.5 After connecting the wires, cover the mounting cover plate and tighten the screws.

5.6 Fixed.

5.6.1 Placement.

This device adopts vertical heat dissipation, so it needs to be placed horizontally when it is fixed, so that the hot air can disperse smoothly. A diagram shows the required clearance for heat dissipation.

5.6.2 Fixed with self-tapping screws or auxiliary fixing devices.

A diagram illustrates mounting the device using screws.

6. Wire Connection Sequences

• The MPPT charging at PV terminal is buck charging, so the voltage at PV terminal must be greater than the voltage at battery terminal.
• The EXT terminal is Buck-Boost charging, so the input voltage only needs to be within the maximum voltage range 35 V.

6.1 Single-battery PV charging system.

The single-battery system supports any connection of the main battery or the secondary battery. The example in the figure below only shows the connection of the battery terminal. Please refer to the following scenarios for the battery connection. A diagram illustrates a single-battery PV charging system.

6.2 The Alternator directly connected to the starter battery.

6.2.1 Smart Alternator.

The alternator will lead out the IGN signal line after starting. When the signal line is detected, the machine will detect the voltage of the starter battery. If the voltage is greater than the set voltage, the starter battery will start to charge the living battery. A diagram illustrates the connection with a smart alternator.

6.2.2 Regular Alternator.

The alternator will directly charge the starter battery after it is started. When the machine detects the voltage of the starter battery, if it is greater than the set voltage, the starter battery will start to charge the living battery. A diagram illustrates the connection with a regular alternator.

6.3 The alternator is connected to the external input port of the controller. (this application is similar to the adapter or power supply directly connected to the external input port)(DC input only)

A diagram illustrates connecting the alternator to the external input port.

7. Working Process Introduction

7.1 System operating battery identification.

A flowchart shows the system operating battery identification process.

7.2 The system determines whether the activation is required.

A flowchart illustrates the process of determining if battery activation is required.

7.3 Switching logic between battery 1 and battery 2 during abnormal operation. (battery with load during operation) (take 12 V system as an example)

A flowchart details the switching logic between battery 1 and battery 2 during abnormal operation.

7.4 Switching logic between battery 1 and battery 2 during normal operation. (battery without load) (take 12 V system as an example)

A flowchart details the switching logic between battery 1 and battery 2 during normal operation.

7.5 Buck-Boost charging. (take 12V system as an example)

A flowchart illustrates the Buck-Boost charging process.

7.6 MPPT Charging.

MPPT is the abbreviation of Maximum Power Point tracking. Since the photovoltaic curve has the following characteristics, it is hoped that the following Work Point can be tracked when the photovoltaic energy is used for charging. A diagram shows the MPPT work point.

7.6.1 Lead-acid 3-phases charging.

A diagram illustrates the 3-phase charging process for lead-acid batteries.

7.6.2 LI Battery Charging.

A diagram illustrates the charging process for Lithium batteries.

7.7 Photovoltaic Characteristics.

7.7.1 PV from dark to normal light. (low light on the left, light enhancement on the right)

Diagrams show the PV characteristics from dark to normal light, illustrating voltage and current changes.

7.7.2 The change of light intensity to photovoltaic curve. (weak light on the left and strong light on the right)

Diagrams illustrate the change of light intensity on the photovoltaic curve.

7.7.3 The effect of temperature on light. (the higher the temperature, the lower the open circuit voltage, but the overall power is almost the same)

Diagrams show the effect of temperature on photovoltaic characteristics.

8. LED Flash Rhythm Chart

(1) Check the Fault light for possible system errors.

9. Key + LED Battery type operation Chart

Status Mode:

See Chart 8

View Mode:

B1/B2 - View the current battery type of B1/B2, and the rest 3 LED lights indicate the specific battery types [Attached Table 2].

Setting Mode:

B1/B2- The current setting for B1/B2, and the rest 3 LED lights indicates battery types for settings [Attached Table 2].

Attached Table 1

Note: In the viewing or setting mode, if there is no key operation for 30 seconds, it will automatically save and exit to enter the status mode.

Attached Table 2

Flash or Always on ○ Off

10. LCD Display Interface Overview

Please check the LCD manual for more details.

11. Product Dimension

Diagrams showing the dimensions of the RluxRV M3333ND Solar Charge Controller.

12. Controller Specification

The variable "n" is adopted as a multiplying factor when calculating parameter voltages, the rule for "n" is listed as if battery system voltage is 12 V, n=1; 24 V, n=2. For example, the equalize charge voltage for a 12 V FLD (Flooded) battery bank is 14.8 V*1=14.8 V. The equalizing charge voltage for a 24 V FLD (Flooded) battery bank is 14.8 V*2=29.6 V.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• -- Reorient or relocate the receiving antenna.
• -- Increase the separation between the equipment and receiver.
• -- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• -- Consult the dealer or an experienced radio/TV technician for help.

This device and its antenna(s) must not be co-located or operation in conjunction with any other antenna or transmitter.

Radiation Exposure Statement
To maintain compliance with FCC's RF Exposure guidelines, This equipment should be installed and operated with minimum distance of 20 cm from your body.