Renogy REGO RBC1260DO-12B 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
General Information ...........................................................................................................07
Key Features ......................................................................................................................07
Charging and Activation Logics ..............................................................................................08
Four Charging Stages ........................................................................................................08
Lithium Battery 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 .....................................................................................................................23
Battery Scenario A: REGO Battery Kit ...............................................................................23
Battery Scenario B: Normal Battery Kit ..............................................................................25
Battery Charger Wiring ...........................................................................................................26
Auxiliary Battery Wiring ..........................................................................................................28
Battery Scenario A: REGO Battery Kit ...............................................................................28
Battery Scenario B: Normal Battery Kit ..............................................................................32
Battery Indicator .................................................................................................................33
Input Wiring ............................................................................................................................34
Mounting .................................................................................................................................36
Temperature Sensor ...............................................................................................................37
Voltage Sensor (Optional) ......................................................................................................38

04
Communication.......................................................................................................................39
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
Technical Specifications .........................................................................................................57
Dimensions .............................................................................................................................58
Maintenance ...........................................................................................................................59
Inspection ...........................................................................................................................59
Cleaning .............................................................................................................................59
Storage ...............................................................................................................................59
Emergency Responses ..........................................................................................................60
Fire .....................................................................................................................................60
Flooding .............................................................................................................................60
Smell ..................................................................................................................................60
Noise ..................................................................................................................................60
Technical Support ...................................................................................................................61

05
Important Safety Information
The user manual provides important installation, operation, and maintenance instructions for
REGO 12V 60A DC-DC Battery Charger (hereinafter referred to as battery charger). 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.
zInstall the battery charger on a vertical surface indoors protected from direct sunlight, high
temperature, and water. Make sure there is good ventilation.
zKeep the battery charger away from heating equipment.
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.
zConfirm the polarities of the devices before connection. A reverse polarity contact will
damage the battery charger and void the warranty.
zRefer to the Recommended Cable Sizing in this manual, and select the appropriate
cables according to the actual use.
zKeep the battery charger out of the reach of children.
zWear proper protective equipment and use insulated tools during installation and
operation.
Important Safety Information
Symbols Used General Safety Information

06
Important Safety Information
zDo not touch the connector contacts while the battery charger is in operation.
zDisconnect all connectors from the battery charger before maintenance or cleaning.
zDo not dispose of battery charger 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 battery charger is installed improperly on a boat, it may cause damage to the
corrosive agents of the boat. Have the battery charger installed by a qualified electrician.
CAUTIO
N
zDo not expose the battery charger to flammable or harsh chemicals or vapors.
zEnsure that there is no water source including downspouts, sprinklers, or faucets above
or near the battery charger.
Symbols Used General Safety Information

07
Introduction
Introduction
General Information
REGO 12V 60A DC-DC Battery Charger saves on installation time than the traditional battery
charger. The pioneering bidirectional charging technology not only provides the most effective
way to charge your auxiliary batteries from the starter battery on the go but also recharges
and maintains your starter battery when the auxiliary batteries are full. The battery charger
is compatible with a multitude of types of 12V batteries. In addition, the four-stage charging
provides various protections to ensure ultra safety. Easily add this 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 auxiliary batteries from the starter battery when driving
and recharge your starter battery when the auxiliary batteries are full. Keep both your
auxiliary 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 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 battery charger is compatible with multiple types of batteries: AGM, Sealed Lead
Acid (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 battery charger provides overvoltage protection, overheat protection, and reverse polarity
protection at the input and output to ensure safe operation. With a guaranteed quality, the
battery charger has obtained many certifications, including CB, FCC, CE, UKCA, and MIC.
General Information Key Features

08
Charging and Activation Logics
Charging and Activation Logics
Four Charging Stages
REGO 12V 60A DC-DC Battery Charger has a four-stage battery charging algorithm for a
rapid, efficient, and safe battery charging. The stages include: Bulk Charge, Boost Charge,
Float Charge, and Equalization.
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:10-300 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 or Boost), the 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.
█Constant Charging:
When the battery voltage reaches the preset value, the 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.
Boost 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
voltage set point. Once the battery is fully charged, there will be no more chemical reactions
Lithium Battery ActivationFour Charging Stages

09
Charging and Activation Logics
and all the charge current would turn into heat or gas. In this case, the 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 battery charger
will no longer be able to maintain the battery to a Float set point and the battery charger will
end the Float charge stage and refer back to Bulk charging.
█Equalization:
Equalization 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, 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 battery charger provides Equalization charging for flooded
type batteries by default.
zDo not equalize VRLA type AGM / Gel / Lithium cell batteries unless permitted by battery
manufacturer.
WARNIN
G
zOnce Equalization is active in the battery charging, the battery charger will not exit this
stage unless there is a sufficient source of charging current from the starter battery. There
should be NO load on the batteries when in Equalization charging.
zOvercharging and excessive gas precipitation may damage the battery plates and
activate material shedding on them. Too high of an Equalization charge or too long of one
may cause damage. 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 allowable input voltages of all loads are greater than the set voltage during
Equalization charging.
Lithium Battery Activation
For the lithium battery with BMS protection, there is a possibility of an open circuit when the
BMS protection function is enabled. Therefore, the battery 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.
Lithium Battery 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
ST 6.3 x 1.8 x 13 mm

11
Optional Accessories
Optional Accessories
Starter Battery Fuse (90A) as input
Auxiliary Battery Fuse (80A) as output
The battery fuses protect battery charger, wires and batteries
from overcurrent.
Fuse Cable
The cable is integrated with copper rings at both ends,
enabling the battery charger to be connected with 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 Battery Voltage Sensor (BVS) Port
6Negative Input 12 Battery Temperature Sensor (BTS)
Port

13
Wiring Diagram
Wiring Diagram
Starter Battery Auxiliary Battery System
+
Negative
Positive
input
output
DC-DC Battery Charger
+
Battery Fuse
(80A)
Battery Fuse
(90A)

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 ft to 10 ft (0 m to 3 m) 6 AWG
11 ft to 20 ft (3 m to 6 m) 6 AWG
21 ft to 30 ft (6 m to 9 m) 4 AWG
Output
0 ft to 10 ft (0 m to 3 m) 8 AWG
11 ft to 20 ft (3 m to 6 m) 6 AWG to 8 AWG
21 ft to 30 ft (6 m to 9 m) 6 AWG
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
NOT
E
zThe adapter cable used in this manual can be made by yourself or purchased from
renogy.com 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. 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
zInstall 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 it in a confined area where battery gases can accumulate.
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 Battery Adapter
Cable to make sure it
can be connected to the
battery charger.
NOT
E
zIf the Battery Adapter Cable is not long enough, you can use more extension cables or
reselect the installation site.
WARNIN
G
zRefer to the Recommended Cable Sizing in this manual, and select the appropriate
cables according to the usage.
Checking Auxiliary Battery
+
-
1. Inspect the auxiliary battery 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
zRead the user manual of the auxiliary battery carefully before installation.
NOT
E
zMake 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, flush the eyes with clean water immediately.
Components & Tools Checking the Battery Charger Checking Auxiliary Battery Automobile Alternator Check

19
Preparation
CAUTIO
N
zComply with local, state, and federal laws and regulations and use recycling channels as
required when disposing of unwanted batteries.
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+U3System Voltage U: U1=U2=U3
2. Combine batteries in
parallel or in series as
needed. This battery
charger supports a
maximum system
voltage of 16V. 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.
NOT
E
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 of a smart alternator or a traditional alternator depends on its parameters. Before
installing the battery charger, 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 16V, and
that of a smart alternator ranges from 12.5V to 16V.
zMake sure the alternators output a minimum current of 90A to 120A, at least 1.5 to 2
times that of the battery charger.
zDue to the current limit protection mechanism, the battery charger takes a maximum of
70A current generated from the alternator.
Components & Tools Checking the Battery Charger Checking Auxiliary Battery Automobile Alternator Check