Renogy REGO User manual

VERSION A0
DC-DC Battery Charger
REGO
12V 60A
USER MANUAL
input output
DC-DC Battery Charger

02
Applicability
The user manual applies to the following product:
zREGO 12V 60A DC-DC Battery Charger (RBC1260DO-12B)
Disclaimer
zRenogy makes no warranty as to the accuracy, sufficiency, or suitability of information in
the user manual because continuous product improvements are going to be made.
zRenogy assumes no responsibility or liability for losses or damages, whether direct,
indirect, consequential, or incidental, which might arise out of the use of information in the
user manual.
zRenogy is not responsible or liable for the failures, damages, or injuries resulting from
repair attempted by unqualified personnel or 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.
Copyright
REGO 12V 60A DC-DC Battery Charger 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.
Trademarks
The following are trademarks or registered trademarks of Renogy in the United States and
other countries and regions:
RENOGY
All other trademarks in the user manual are the property of their respective owners and their
use herein does not imply sponsorship or endorsement of their products or services. The
unauthorized use of any trademark displayed in the user manual or on the product is strictly
prohibited.
Date and Revision
March 2022, Revision A0

03
Table of Contents
Important Safety Information ..................................................................................................05
Symbols Used ....................................................................................................................05
General Safety Information ................................................................................................05
Introduction .............................................................................................................................07
Introduction ........................................................................................................................07
Key Features ......................................................................................................................07
Four Charging Stages ........................................................................................................08
Lithium Activation ...............................................................................................................09
Package Contents ..................................................................................................................10
Optional Accessories .............................................................................................................. 11
Product Overview ...................................................................................................................12
Wiring Diagram .......................................................................................................................13
Recommended Cable Sizing ..................................................................................................14
Preparation .............................................................................................................................15
Components & Tools ..........................................................................................................15
Checking the Battery Charger ............................................................................................17
Checking Auxiliary Battery .................................................................................................18
Automobile Alternator Check ..............................................................................................19
System Diagram .....................................................................................................................21
Battery Scenario A: REGO Battery Kit ...............................................................................21
Battery Scenario B: Normal Battery Kit ..............................................................................23
Battery Charger Wiring ...........................................................................................................24
Auxiliary Battery Wiring ..........................................................................................................26
Battery Scenario A: REGO Battery Kit ...............................................................................26
Battery Scenario B: Normal Battery Kit ..............................................................................30
Battery Indicator .................................................................................................................31
Input Wiring ............................................................................................................................32
Mounting .................................................................................................................................36
Temperature Sensor ...............................................................................................................37
Voltage Sensor (Optional) ......................................................................................................38
Communication.......................................................................................................................39

04
Inter-Device Communication ..............................................................................................39
Monitoring Device Communication ....................................................................................42
Operation ................................................................................................................................47
Selecting the Battery Type .................................................................................................47
Battery Charging Parameters .............................................................................................49
User Mode ..........................................................................................................................50
Charging Logic .......................................................................................................................53
LED Indicators ........................................................................................................................55
Battery status .....................................................................................................................55
Fault status .........................................................................................................................55
Troubleshooting ......................................................................................................................56
Maintenance ...........................................................................................................................57
Inspection ...........................................................................................................................57
Cleaning .............................................................................................................................57
Storage ...............................................................................................................................57
Emergency Responses ..........................................................................................................58
Fire .....................................................................................................................................58
Flooding .............................................................................................................................58
Smell ..................................................................................................................................58
Noise ..................................................................................................................................58
Technical Support ...................................................................................................................59
Technical Specifications .........................................................................................................60
Dimensions .............................................................................................................................61

05
Important Safety Information
The user manual provides important installation, operation, and maintenance instructions
for REGO 12V 60A DC-DC Battery Charger. Please 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 battery charger, potentially rendering it inoperable. The installation and
service of the battery charger 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 battery charger.
zDo not open, dismantle, repair, tamper with, or modify the components of the battery
charger.
zPlease install the battery charger indoors to avoid exposing the components to direct
sunlight.
zDo not immerse the battery charger or its components in water or other fluids.
zPlease keep the battery charger away from heating equipment to prevent high
temperatures. Make sure there is good ventilation.
zPlace the battery charger on a vertical surface.
zDo not insert foreign objects into the battery charger.
zRisk of explosion! Never install the battery charger in a sealed enclosure with flooded
batteries! Do not install in a confined area where battery gases can accumulate.
zPlease confirm the polarity of the devices before connection. A reverse polarity contact
can cause injury and damage the device.
zPlease refer to the “Recommendations of Wire Diameters and Fuses” in this manual, and
select the satisfied cables and fuses according to the usage.
Important Safety Information
Symbols Used General Safety Information

06
Important Safety Information
zKeep the battery charger out of the reach of children.
zPlease wear proper protective equipment and use insulated tools during installation and
operation.
zDo not touch the connector contacts when the charger is working.
zPlease remove all connections before maintenance or cleaning.
zDo not dispose of battery charger as household waste. Please use recycling channels in
accordance with local, state, and federal regulations.
zIn the event of fire, use a fire extinguisher that is suitable for electrical devices.
zIf electrical devices are incorrectly installed on boats, this can lead to corrosion of the
boat. Have the product installed by a qualified (boat) electrician.
CAUTIO
N
zDo not expose the battery charger to flammable or harsh chemicals or vapors.
zEnsure that no water sources are above or near the battery charger, including
downspouts, sprinklers, or faucets.
Symbols Used General Safety Information

07
Introduction
Introduction
Introduction
The Renogy REGO DC-DC Battery Chargers save on installation time than traditional
chargers. The pioneering bidirectional charging technology not only provides the most
effective way to charge your house batteries from the starter battery on the go but also
recharges and maintains your starter battery when the house batteries are full. The battery
charger is compatible with a multitude of types of 12V alternators and batteries. In addition,
the four-stage charging provides various protections to ensure ultra safety. Easily add this
DC-DC battery charger to your RVs, commercial vehicles, boats, yachts, and many more
applications, to get stable energy on the go!
Key Features
zPioneering Bidirectional Charging
This battery charger can charge your house batteries from the starter battery when driving
and recharge your starter battery when the house batteries are full. Keep both your house
batteries and starter battery always have adequate power on the go.
zExtremely Simplified Installation and Easy to Select the Battery Type
This battery charger uses Anderson connectors instead of traditional ring terminals. This
significantly simplifies device connection, saving over 60% installation time. The unique
mechanical design requires no more complicated data setting steps. You can select the
battery type with a simple turn on the knob.
zHigh-Efficiency Charging
The DC-DC battery charger adopts the four-stage charging technology (Bulk/Boost/Float/
Equalization) to prolong the battery lifespan, realizing an optimal charging efficiency.
zCompatible with Multiple Battery Types, Suitable for Wide Application
The DC-DC battery charger is compatible with multiple types of batteries: AGM, SLD,
Flooded, Gel, and Lithium, providing a powerful charging solution for different occasions.
Moreover, it can interoperate with with both traditional and smart alternators.
zVarious Protections for Ultra Safety
The charger offers Overvoltage Protection, Overtemperature Protection, and Reverse
Polarity Protection on both inputs and outputs to ensure operation safety. The charger is of
guaranteed quality with multiple certifications, including IEC/EN 60335, FCC-ID, CE-RED,
and MIC.
Introduction Key Features Four Charging Stages Lithium Activation

08
Introduction
Four Charging Stages
REGO 12V 60A DC-DC Battery Charger has a four-stage battery charging algorithm for a
rapid, efficient battery charging. They include Bulk Charge, Boost Charge, Float Charge, and
Equalization Charge.
A
Time
Time
CHARGING
CURRENT
Fast charging
B
Constant voltage charging
C
Floating 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 Charge:
During the high current fast charging phase, if the battery voltage has not yet reached the
preset value (Equalization/Boost voltage), the DC-DC Battery Charger will perform Bulk
charging and output a constant maximum current value continuously and steadily. When the
battery voltage reaches the preset value, it will move to the next stage of constant voltage.
█Boost Charge:
When the battery voltage reaches the preset value, the DC-DC Battery Charger enters the
constant voltage charging stage, and constant high current charge is no longer used in this
process. At the same time, the charge current will gradually drop. Two states exist in the
constant voltage charging phase-Equalizing and Boosting, which are not repeated.
Constant Charge: Boost stage maintains a charge for 2 hours by default. The user can
adjust the constant time and preset value of Boost according to their
demand.
█Float Charge:
After the constant voltage stage, the controller will reduce the battery voltage to a Float
Introduction Lithium ActivationKey Features Four Charging Stages

09
Introduction
voltage set point. Once the battery is fully charged, there will be no more chemical reactions
and all the charge current would turn into heat or gas. In this case, the DC-DC Battery
Charger will reduce the voltage charge to smaller quantity, while lightly charging the battery.
The purpose for this is to offset the power consumption while maintaining a full battery
storage capacity. In the event that a load drawn from the battery exceeds the charge current,
the DC-DC Battery Charger will no longer be able to maintain the battery to a Float set
point and the DC-DC Battery Charger will end the Float charge stage and refer back to Bulk
charging.
█Equalization:
It is carried out every 30 days of the month. It is intentional overcharging of the battery
for a controlled period of time. Certain types of batteries benefit from periodic equalizing
charge, which can stir the electrolyte, balance battery voltage and complete chemical
reaction. Equalizing charge increases the battery voltage, to a level higher than the standard
complement voltage, which gasifies the battery electrolyte.
CAUTIO
N
zIt is recommended to only use no-sealed/vented/flooded/wet cell lead acid batteries in the
Equalization stage, and the charger provides Equalization charging for FLD type batteries
by default.
zDo not equalize VRLA type AGM / Gel / Lithium cell batteries UNLESS permitted by
battery manufacturer.
zREGO 12V 60A DC-DC Battery Charger provides Equalization charging for flooded
batteries by default, with a cycle of once every 30 days.
WARNIN
G
zOnce Equalization is active in the battery charging, the DC-DC charger will not exit this
stage unless there is a sufficient source of charging current from the starter battery or DC
alternator. There should be NO load on the batteries when in Equalization charging stage.
zOver-charging and excessive gas precipitation may damage the battery plates and
activate material shedding on them. Too high of an equalizing charge or too long of one
may cause damage. Please carefully review the specific requirements of the battery used
in the system.
zEqualization may increase battery voltage to a level damaging to sensitive DC loads.
Ensure that all load allowable input voltages are greater than the set voltage during
equalizing charging.
Lithium Activation
For the lithium battery with BMS protection, open circuit may occur when the BMS protection
function is enabled. Therefore, the charger will output a stable voltage in time in the lithium
battery mode. In this way, the lithium battery will be activated to exit BMS protection function.
Introduction Key Features Lithium ActivationFour Charging Stages

10
Package Contents
Package Contents
REGO 12V 60A
DC-DC Battery Charger x 1 Quick Guide x 1
input output
DC-DC Battery Charger
VERSION A1
DC-DC Battery Charger
REGO
12V 60A
QUICK GUIDE
input output
DC-DC Battery Charger
Renogy Temperature
Sensor x 1
(Model: RTSCC)
IGN Signal Wire x 1
Screws x 4
ST6.3x1.8x13mm

11
Optional Accessories
Optional Accessories
Starter Battery Fuse (90A) as input
Auxiliary Battery Fuse (80A) as output
The battery fuses will protect battery charger, wires and
batteries from overcurrent.
Fuse Cable
The wire is designed with two sections of copper rings, thus
enabling the battery charger to function as an external fuse.
Battery Voltage Sensor (Model: RVSCC)
The charging voltage of the battery charger is affected by the
length and size of the wire. The voltage sensor can calibrate
the charging voltage error caused by the wire to ensure that
the battery charger works properly.

12
Product Overview
Product Overview
input output
DC-DC Battery Charger
IGN
CAN CAN
BVS BTS
DC-DC Battery Charger
input output
DC-DC Battery Charger
31 14
91165 10 127 8 9
2
No. Part No. Part
1Mounting Holes 7Negative Output
2 Fault Status Indicator 8 Positive Output
3 Battery Status Indicator 9 CAN Communication Ports
4Battery Type Setting Knob 10 IGN Signal Wire Port
5Positive Input 11 BVS (Battery Voltage Sensor) Port
6Negative Input 12 BTS (Battery Temperature Sensor)
Port

13
Wiring Diagram
Wiring Diagram
Starter Battery or DC Alternator Auxiliary Battery System
+
Negative
Positive
input
output
DC-DC Battery Charger
+

14
Recommended Cable Sizing
Recommended Cable Sizing
Model Cable Cable Length (ft) / (m) Recommended Cable Size
REGO 12V 60A
DC-DC Battery
Charger
(RBC1260DO-12B)
Input
0 to 10ft / 0 to 3m 6AWG
11 to 20ft / 3 to 6m 6AWG
21 to 30ft / 9 to 6m 4AWG
Output
0 to 10ft / 0 to 3m 8AWG
11 to 20ft / 3 to 6m 6-8AWG
21 to 30ft / 9 to 6m 6AWG
NOT
E
zThe cable specifications listed above account for critical, less than 3% voltage drop and
may not account for all configurations.
zThe specification of fuse cable is consistent with that of the input/output terminal of battery
charger.

15
Preparation
Preparation
Components & Tools
CAUTIO
N
zThe adapter cable used in this manual can be made by yourself or purchased from
Renogy official website according to the names in Recommended Components.
Recommended Components
Battery Scenario A: REGO Battery Kit
REGO 12V 400Ah Lithium
Iron Phosphate Battery
Battery Adapter Cables (input)
( Anderson PP75 to Ring
Terminal Adapter Cable )
System Combiner Box Accessory Set Positive/Negative Busbars Accessory Set
REGO 4 Ports 400A System Combiner Box Positive/Negative Busbars
DC-DC Charger
Inverter
Battery Adapter Cable (output)
( Anderson PP75 to Anderson 120 Adapter
Cable or Anderson PP75 to Ring Terminal
Adapter Cable )
Battery Adapter Cable (output)
( Anderson PP75 to Ring
Terminal Adapter Cable )
Anderson PP75
Anderson 120
Components & Tools Checking the Battery Charger Checking Auxiliary Battery Automobile Alternator Check

16
Preparation
Battery Scenario B: Normal Battery Kit
Normal Battery with +/- Bolts
Battery Adapter Cables (input / output)
( Anderson PP75 to Ring Terminal Adapter
Cable )
+
-
Required Tools
Wrench (10mm) Wrench (14mm) Measuring Tape Insulation Tape
10mm
10mm
10mm
14mm
14mm
14mm
3
4
5
6
Components & Tools Checking the Battery Charger Checking Auxiliary Battery Automobile Alternator Check

17
Preparation
Checking the Battery Charger
input output
DC-DC Battery Charger
1. Please inspect the battery charger for any visible damage
including cracks, dents, deformation, and other visible
abnormalities. All connector contacts shall be clean, dry,
and free of dirt and corrosion.
WARNIN
G
zDo not use the battery charger if it has any visible damage.
DC-DC Battery Charger
≥150mm
≥5.91inch
≥150mm
≥5.91inch
2. Confirm the installation location.
WARNIN
G
zPlease install the battery charger indoors and prevent its components from being exposed
to direct sunlight. Prevent water from entering the battery charger.
zRisk of explosion! Never install the battery charger in a sealed enclosure with flooded
batteries! Do not install in a confined area where battery gases can accumulate.
zPlace the battery charger on a vertical surface. Make sure there is good ventilation.
zThe battery charger requires at least 6 inches (150mm) of clearance above and below for
proper air flow.
zMake sure that the battery charger is installed in an environment with relative humidity
between 0% and 95% and no condensation.
Components & Tools Checking the Battery Charger Checking Auxiliary Battery Automobile Alternator Check

18
Preparation
DC-DCBattery Charger
3. Measure the length of
the cables connecting
to the battery and solar
panel so they can be
connected to the battery
charger.
NOT
E
zIf the Battery Adapter Cable or Solar Panel Extension Cable is not long enough, you can
use more extension cables or reselect the position where the battery charger needs to be
secured.
WARNIN
G
zPlease refer to the Recommendations of Wire Diameters and Fuses in this manual, and
select the satisfied cables according to the usage.
Checking Auxiliary Battery
+
-
1. Please inspect the battery charger for any visible damage
including cracks, dents, deformation, and other visible
abnormalities. All connector contacts shall be clean, dry
and free of dirt and corrosion.
INF
O
zPlease read the user manual of the auxiliary battery carefully before installation.
NOT
E
zPlease make sure the battery is working normally.
zThe battery charger can only be applied to a deep-cycle sealed lead-acid battery, a
flooded battery, a gel battery or a lithium iron phosphate battery.
zTake care to use a high-capacity lead-acid battery. Be sure to wear protective goggles. If
carelessly getting electrolyte in your eyes, please flush the eyes with clean water from a
cup or other container immediately.
Components & Tools Checking the Battery Charger Checking Auxiliary Battery Automobile Alternator Check

19
Preparation
CAUTIO
N
zIf you replace your battery with a new one, please dispose of the used battery through the
specified recycling channel according to the local, state, and federal laws and regulations.
WARNIN
G
zDo not use the battery charger if it has any visible damage.
zDo not touch the exposed electrolyte or powder if the battery housing is damaged.
zWhen being charged, the battery may give off explosive gas. Make sure there is good
ventilation.
Battery or Battery Pack System Voltage
Battery or Battery pack system voltage = System voltage U
Batteries in Series Batteries in Parallel
System voltage U:
U1+U2+U3
System voltage U:
U1=U2=U3
2. The batteries can be
combined in parallel or
in series as needed.
This battery charger
supports a maximum
system voltage of 16V.
Please refer to the
user manual for battery
voltage parameters, and
calculate the battery
or battery pack system
voltage according to the
formula to ensure that it
does not exceed 16V.
CAUTIO
N
zIn the formula, U represents the battery voltage, and 1, 2 or 3 represents the battery
number, respectively.
WARNIN
G
zDo not use the battery charger if the battery/battery pack system voltage exceeds 16V.
Doing so will cause damage to the battery charger.
Automobile Alternator Check
The automobile alternator may be a smart alternator or a traditional alternator. The connection
method varies depending on the specific alternator. Before installing the battery charger,
please refer to the user manual of the vehicle or consult the vehicle supplier to determine the
type of alternator. In addition, you can use a multimeter by yourself to measure the alternator
to determine the type of alternator.
Components & Tools Checking the Battery Charger Checking Auxiliary Battery Automobile Alternator Check

20
Preparation
1. Locate your main vehicle battery/starter battery.
L
O
C
K
A
C
C
O
N
S
T
A
R
T
2. Start the engine, ensuring any fans, radio, and lights. are
turned off. Leave the engine running for around 5 to 10
minutes.
-
+
3. Read the voltage of the
main vehicle battery.
For traditional
alternators, the DC
voltage is around 14.4V.
For smart alternators,
the DC voltage is
around 12.5V to 13.5V.
NOT
E
zIn general, the working voltage of a traditional alternator ranges from 13.5V to 6V, and
that of a smart alternator ranges from 12.5V to 16V.
zThe maximum output current of the alternator needs to be ≤ 70A and the maximum output
power should be ≤ 800W.
zThe DC-DC battery charger interoperates with alternators at a minimum current of 90A to
120A, at least 1.5 to 2 times that of the battery charger.
Components & Tools Checking the Battery Charger Checking Auxiliary Battery Automobile Alternator Check