Renogy Rover Li Series User manual

VERSION A6
MPPT Solar Charge Controller
Rover Li Series
12V/24V 20A/30A/40A
USER MANUAL

Applicability
The user manual applies to the following products:
zRover Li 12V/24V 20A MPPT Solar Charge Controller (RNG-CTRL-RVR20)
zRover Li 12V/24V 30A MPPT Solar Charge Controller (RNG-CTRL-RVR30)
zRover Li 12V/24V 40A MPPT Solar Charge Controller (RNG-CTRL-RVR40)
Disclaimer
zRenogy ensures the accuracy, sufficiency, and the applicability of information in the user
manual at the time of printing due to continual product improvements that may occur.
zRenogy assumes no responsibility or liability for personal and property losses, whether
directly and indirectly, caused by the user’s failure to install and use the product in
compliance with the user manual.
zRenogy is not responsible or liable for failures, damages, or injuries resulting from repair
attempted by unqualified personnel, improper installation and operation.
zThe illustrations in the user manual are for demonstration purposes only. Details may appear
slightly different depending on product revision and market region.
zRenogy reserves the right to change the information in the user manual without notice. For
the latest user manual, visit renogy.com.
Copyright
Rover Li Series MPPT Solar Charge Controller User Manual © 2022 Renogy. All rights reserved.
All information in the user manual is subject to copyright and other intellectual property rights
of Renogy and its licensors. The user manual may not be modified, reproduced, or copied, in
whole or in part, without the prior written permissions of Renogy and its licensors.
Trademark
The following are registered trademarks of Renogy:
RENOGY
The registered trademarks in the user manual are the property of Renogy. The unauthorized use
of the trademarks is strictly prohibited.
Date and Revision
January 2023, Revision A6

Table of Contents
Important Safety Information .......................................................................................................01
Symbols Used .........................................................................................................................01
General Safety Information .....................................................................................................01
Introduction..................................................................................................................................03
General Information ................................................................................................................03
Key Features...........................................................................................................................03
Charging and Activation Logic.....................................................................................................04
MPPT Technology ...................................................................................................................04
Four Charging Stages .............................................................................................................05
Lithium Battery Activation........................................................................................................07
Package Contents .......................................................................................................................08
Optional Accessories...................................................................................................................09
Product Overview ........................................................................................................................10
Wiring Diagram............................................................................................................................11
Recommended Cable and Fuse Sizing.......................................................................................12
Recommended Cable Sizing...................................................................................................12
Recommended Fuse Sizing ....................................................................................................13
Components & Tools ...................................................................................................................14
Preparation..................................................................................................................................15
Inspection................................................................................................................................15
Environment ............................................................................................................................15
Placement ...............................................................................................................................16
Checking Battery.....................................................................................................................17
Checking Solar Panel..............................................................................................................18
Mounting......................................................................................................................................20
Wall-mounted ..........................................................................................................................20

Mounting with Brackets ...........................................................................................................22
Installation ...................................................................................................................................24
Battery Wiring..........................................................................................................................24
Solar Wiring.............................................................................................................................27
Load Wiring (Optional) ............................................................................................................30
Temperature Sensor....................................................................................................................33
Bluetooth Module (Optional)........................................................................................................34
Battery Type ................................................................................................................................36
Setting the Battery Type..........................................................................................................36
Battery Charging Parameters..................................................................................................37
User Mode...............................................................................................................................38
System Voltage............................................................................................................................45
Monitoring....................................................................................................................................47
Monitoring Menu .....................................................................................................................47
Checking Parameters..............................................................................................................51
Load Control................................................................................................................................52
Turning Load On / Off..............................................................................................................52
Switching Load Mode..............................................................................................................52
LED Indicators.............................................................................................................................55
Solar Panel LED Indicator.......................................................................................................55
Battery LED Indicator ..............................................................................................................56
Load LED Indicator .................................................................................................................56
System Error LED Indicator ....................................................................................................56
Troubleshooting...........................................................................................................................57
Common Faults.......................................................................................................................57
Error Codes.............................................................................................................................59
Technical Specifications ..............................................................................................................62
MPPT Conversion Efficiency .......................................................................................................64

Dimensions..................................................................................................................................65
RNG-CTRL-RVR20.................................................................................................................65
RNG-CTRL-RVR30 or RNG-CTRL-RVR40 ............................................................................66
Maintenance................................................................................................................................67
Inspection................................................................................................................................67
Cleaning ..................................................................................................................................67
Storage....................................................................................................................................67
Emergency Responses ...............................................................................................................68
Fire ..........................................................................................................................................68
Flooding ..................................................................................................................................68
Smell .......................................................................................................................................68
Noise .......................................................................................................................................68
Technical Support........................................................................................................................69

01
Important Safety Information
The user manual provides important installation, operation, and maintenance instructions for
Rover Li Series Solar Charge Controller (hereinafter referred to as charge controller). Read the
user manual carefully before installation and operation and save it for future reference. Failure
to observe the instructions or precautions in the user manual can result in electrical shock,
serious injury, or death, or can damage the charge controller, potentially rendering it inoperable.
The installation and service of the charge controller might require knowledge of electricity and is
recommended to be carried out by qualified personnel.
Symbols Used
The following symbols are used throughout the user manual to highlight important information:
WARNIN
G
Indicates a potentially dangerous condition which could result in
injury or death
CAUTIO
N
Indicates a critical procedure for safe and proper installation and
operation
NOT
E
Indicates an important step or tip for optimal performance
INFO
Indicates that more information is available in other documents
relating to the subject
General Safety Information
WARNIN
G
zDo not puncture, drop, crush, penetrate, shake, strike, or step on the charge controller.
zDo not open, dismantle, repair, tamper with, or modify the components of the charge
controller.
zInstall the charge controller on a vertical surface indoors protected from direct sunlight, high
temperature, and water. Make sure there is good ventilation.
zDo not immerse the charge controller or its components in water or other fluids.
zKeep the charge controller away from heating equipment.
zDo not insert foreign objects into the charge controller.
zRisk of explosion! Never install the charge controller in a sealed enclosure with flooded
batteries! Do not install in a confined area where battery gases can accumulate.
zConfirm the polarities of the devices before connection. A reverse polarity contact will result
in abnormalities.
zRefer to Recommended Cable and Fuse Sizing in this user manual, and select the
appropriate cables and fuses according to the usage.
zKeep the charge controller out of the reach of children.
Important Safety Information
Symbols Used General Safety Information

02
Important Safety Information
zWear proper protective equipment and use insulated tools during installation and operation.
zDo not touch the connector contacts when the charge controller is in operation.
zDisconnect all connectors from the charge controller before maintenance or cleaning.
zDo not dispose of the charge controller as household waste. Comply with local, state, and
federal laws and regulations and use recycling channels as required.
zIn the event of fire, use fire extinguishers suitable for electrical equipment.
zIf the charge controller is installed improperly on a boat, it may cause damage to the
corrosive agents of the boat. Please have the charge controller by a qualified electrician.
CAUTIO
N
zDo not expose the charge controller to flammable or harsh chemicals or vapors.
zEnsure that there is no water source including downspouts, sprinkles, or faucets above or
near the charge controller.
zEnsure that the battery pack is properly connected before installation.
Symbols Used General Safety Information

03
Introduction
Introduction
General Information
Rover Li Series MPPT Solar Charge Controller can serve various off-grid solar systems. With the
adoption of intelligent MPPT (Maximum Power Point Tracking) algorithm, the charge controller
can maximize the energy from the solar panel to charge the battery in a more efficient way. At
the same time, it monitors the status of the battery in real time and prevents the battery from
overcharge and overdischarge, thus extending the battery life and improving the performance of
the system.
Rover Li Series MPPT Solar Charge Controller provides intelligent self-diagnosis and multiple
input protecion mechanisms, which can prevent damage caused by installation errors or system
failures.
Key Features
zAuto Battery Voltage Detection
The charge controller detects 12V or 24V DC system voltages for non-lithium batteries and
programmability for lithium batteries.
zMPPT Technology
The charge controller supports advanced MPPT technology with tracking efficiency up to 99%
and peak conversion efficiency of 98%.
zHigh Battery Compatibility
The charge controller is compatible with AGM, SLD, flooded, gel, lithium, and user-defined
batteries.
zFull System Protection
The full system protection is meant to safeguard your system, and the self-diagnostic capability
can assess and protect against reverse polarity, battery overcharging, battery overdischarging,
overload, short-circuiting, and reverse current.
zMultiple Input Protection Features
The charge controller offers reverse polarity protection, overvoltage protection, short circuit
protection, and reverse charging protection at night for solar panels.
zDiverse Load Control
You can connect DC appliances directly to the optional Load Terminals and monitor consumption
or set up timer controls directly from the charge controller.
General Information Key Features

04
Charging and Activation Logic
Charging and Activation Logic
MPPT Technology
Based on MPPT technology, the charge controller can extract maximum power from the solar
panel. With an automatic tracking algorithm, the MPPT technology can track the voltage of
the maximum power point that changes with weather conditions, ensuring the harvest of the
maximum power throughout the day.
█Current Boost
Generally, the charge controller will “boost” the current in the solar system. The power generated
in the solar panel is the same as the power delivered to the battery pack. Power is the product
of voltage (V) x amperage (A).
Therefore, assuming 100% efficiency:
Power In = Power Out
Volts In * Amps In = Volts Out * Amps Out
The efficiency of the charge controller is about 95%. As the maximum power point voltage of the
solar system is greater than the battery pack voltage, the potential difference is proportional to
the current boost. The voltage of the solar panel needs to be stepped down to a rate at which
the battery can be charged in a stable manner. Compared with traditional charge controllers, the
charge controller does not waste the stepped down voltage. It is entirely possible to have the
solar module input 8 amps of current into the charge controller, and have the charge controller
output 10 amps of current to the battery pack. The following shows a graphic point about the
output of MPPT technology.
10 15 17 10 15 17
Current vs.Voltage (12V System) Output Power (12V System)
Typical Battery
Voltage Range Traditional
Controller
Operating
Range
Maximum
Power Point
Maximum
Power Point
Current
Power
Voltage Voltage
█Limiting Effectiveness
High temperature is the natural enemy of solar panels. With the increase of ambient
temperature, the operating voltage (Vmp) of the solar panel decreases, which limits the power
generation of the solar panel. The charge controller encounters an inevitably decrease in
charging performance even with the MPPT technology. In this case, it is better to use solar
panels with higher nominal voltage, so that the battery can still get current boost even if the
voltage drops proportionally.
MPPT Technology Four Charging Stages Lithium Battery Activation

05
Charging and Activation Logic
Four Charging Stages
Rover Li Series MPPT Solar Charge Controller has a four-stage battery charging algorithm for a
rapid, efficient, and safe battery charging. The stages include: Bulk Charging, Boost Charging,
Float Charging, and Equalization.
A
Time
Time
Charging
Current
Fast charging
B
Constant voltage charging
C
Float charging
Boost charging voltage
Equalization charging voltage
Float charging voltage
Charging return voltage
Maximum
current
Constant pressure time
Cumulative Time
(Range:10-600 min)
: 2hr
: 2hr
Battery
Voltage
█Bulk Charging:
This algorithm is used for day to day charging. It uses 100% of available solar power to recharge
the battery and is equivalent to constant current. In this stage the battery voltage has not yet
reached constant voltage (equalization or boost), the charge controller operates in constant
current mode, delivering its maximum current to the batteries (MPPT Charging).
█Constant Charging:
When the battery reaches the constant voltage set point, the charge controller will start to
operate in constant charging mode, where it is no longer MPPT charging. The current will drop
gradually. The charge stages (equalization and boost) are not carried out constantly in a full
charge process to avoid too much gas precipitation or overheating of the battery.
Boost Charging: Boost stage maintains a charge for 2 hours by default. The user can adjust
the constant time and preset value of boost per their demand.
█Float Charging:
After the constant voltage stage, the charge controller will reduce the battery voltage to a float
voltage set point. Once the battery is fully charged, there will be no more chemical reactions
MPPT Technology Four Charging Stages Lithium Battery Activation