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An Expert of Energy Storage Solutions.
Narada lead-carbon battery
Dedicated to energy storage
By Walter. Jin
+86-18917365151
The REX-C series battery
Stored Energy Solutions for a Demanding World!
Narada REX-C series batteries are deigned for application of energy storage with patented lead-carbon technology,
combined features of both capacitor and lead acid battery, especially in condition of Partial Status of Charge (PSoC)
• No sulfation problem at negative
• Design life above 20 years (20oC)
• 5~10 times more lifespan at PSoC
• High specific power, fast charging
• About 40% more charge acceptance
About Renewable Energy eXtra-Carbon battery
Product definition Lead-carbon battery series
Stored Energy Solutions for a Demanding World!
Product overview of 2VREXC Lead-carbon battery series
The product family of Renewable Energy eXtra-Carbon (2V series)
Stored Energy Solutions for a Demanding World!
Illustration of dimension Lead-carbon battery series
231mm
40
8m
m 3
96
mm
120mm
13
0m
m
282mm
Dimension of REX-C 1000
Stored Energy Solutions for a Demanding World!
Model Voltage Rated capacity Dimension (L*W*H) Weight
REXC-200 2V 200Ah 227.0*96.0*303.0mm 17.0kg
REXC-400 2V 400Ah 227.0*170.0*303.0mm 32.0kg
REXC-600 2V 600Ah 231.0*180.0*408.0mm 46.0kg
REXC-800 2V 800Ah 231.0*231.0*408.0mm 60.0kg
REXC-1000 2V 1000Ah 231.0*282.0*408.0mm 75.0kg
REXC-1500 2V 1500Ah 232.0*322.0*514.0mm 110.0kg
REXC-2000 2V 2000Ah 232.0*456.0*514.0mm 155.0kg
REXC-2000 REXC-1000 REXC-400
Product overview of 2VREXC Lead-carbon battery series
Stored Energy Solutions for a Demanding World!
Brief information
12REXC series batteries is 12V version of REXC series
products, which is slim and compact, suitable for on-
site installation. It is especially designed for cabinet
unit, widely applied in residential energy storage.
Product overview of 12VREXC Lead-carbon battery series
Stored Energy Solutions for a Demanding World!
Model Voltage Rated capacity Dimension (L*W*H) Weight
12REXC70 12V 60Ah 280.0*180.0*244.0mm 30.0kg
12REXC120 12V 100Ah 290.5*224.0*294.0mm 56.0kg
12REXC200 12V 165Ah 438.0*224.0*294.0mm 79.5kg
6REXC240 6V 200Ah 264.0*224.0*294.0mm 58.0kg
6REXC300 6V 250Ah 338.0*224.0*294.0mm 61.0kg
Product overview of 12VREXC Lead-carbon battery series
12REXC200 6REXC300 12REXC70
Stored Energy Solutions for a Demanding World!
With a wide range of output power
Modular design for easier configuration
Robust design with high system reliability
Compact and less space occupancy
It is an economical storage solution, consists of
12REXC series batteries, whose capacity could be
freely configured according to actual requirement
Brief information
Residential storage cabinet Lead-carbon battery series
Stored Energy Solutions for a Demanding World!
DC
AC
Hybrid inverter
PV array
Load
Batteries
Smart meter Grid
Monitoring
Residential storage solution Lead-carbon battery series
Stored Energy Solutions for a Demanding World!
Storage cabinet in the system Lead-carbon battery series
Inverter
Battery
cabinet
PV module
Monitoring
Load
Switch
Smart meter
Stored Energy Solutions for a Demanding World!
Illustration of installation Lead-carbon battery series
Step one
Fix two side columns
on to bottom board
Step two
Insert back board into
the slot of side column
Step three
Load four pieces of
12V of REXC batteries
Stored Energy Solutions for a Demanding World!
Dimension of storage cabinet Lead-carbon battery series
16
17
.0m
m
1124.0mm 361.5mm
53
9.0
mm
Stored Energy Solutions for a Demanding World!
Voltage Capacity Battery type Rated voltage Cabinet units
Low voltage series system
4 kWh 12REX200
48V 1
5 kWh 60V 2
6 kWh 6REX300
48V 2
9 kWh 72V 3
Medium voltage series system
12 kWh 12REX200 144V 3
18 kWh 6REX300 144V 6
7 kWh 12REXC70 228V 5
High voltage series system
8 kWh 12REXC70 264V 6
24 kWh
12REX200
288V 6
28 kWh 336V 7
32 kWh 384V 8
Residential storage cabinet Lead-carbon battery series
Stored Energy Solutions for a Demanding World!
Detailed schema of REXC Lead-carbon battery series
Safety
valve 1
Negative
terminal
Positive
terminal
Battery
housing
Safety
valve 2
Battery
cover lid
Battery
bus-bar
Battery
terminal
Stored Energy Solutions for a Demanding World!
Batteries comparison-1 Lead-carbon battery series
Parameter REXC HTB OPzV Conventional
Technologies AGM AGM Gel AGM
Service life (80%DOD) 5 years 3.5 years 4 years 0.5 years
Temp. Range -40℃ to 55℃ -40℃ to 80℃ -40℃ to 55℃ -40℃ to 55℃
Initial Capacity ★★★ ★★★ ★★ ★★
Internal resistance ★★★ ★★★ ★★ ★★★
High current ★★★ ★★★ ★★ ★★★
Fast charging ★★★ ★★★ ★ ★★
PSOC performance ★★★★ ★★★ ★★ ★
Anti-water loss ★★★ ★★★★ ★★ ★★
Anti-therm. runaway ★★★ ★★★★ ★★★ ★★
Cycle life >80%DOD ★★★★ ★★ ★★★ ★
Cycle life <80%DOD ★★★★ ★★★ ★★★ ★★
Float life ★★★ ★★★★ ★★★ ★★
Stored Energy Solutions for a Demanding World!
Batteries comparison-2 Lead-carbon battery series
Items Lead-carbon Lithium-ion Remarks
Lifespan 5000 cycles @50% DOD
6000 cycles @60% DOD
Battery recovery 30% 0 No good recovery for Li battery
System safety ★★★★ ★★
The electrolyte of lead-carbon
is inorganic, much more stable,
up to 2000AH, less quantity
Investment cost (WH) ★★★★ ★★ Half initial cost for lead-carbon
BMS cost 5% 20% High stability for lead carbon,
with less quantity of batteries
Efficiency 90% 95%
Temperature range -40oC ~ +50oC +15oC ~ +30oC No low temp. for Li battery
Stored Energy Solutions for a Demanding World!
Research project of ALABC Lead-carbon battery series
> Advanced Lead-Acid Battery Consortium (ALABC) is an authoritative organization of lead batteries
> Narada is the first and the only Chinese enterprise who was sponsored by R&D Program of ALABC
> The vice president of ALABC Boris Monahov has highly praised Narada for its advanced technology
Cooperation with specialists of ALABC Project launching of lead-carbon battery
Stored Energy Solutions for a Demanding World!
Research project of ALABC Lead-carbon battery series
Contract signature for the Research Agreement
Stored Energy Solutions for a Demanding World!
Authorization for membership by ALABC
Research project of ALABC Lead-carbon battery series
The background of REXC
Stored Energy Solutions for a Demanding World!
Main advantages of lead-acid Why lead-carbon battery?
Market share of various batteries
Lead
Li-ion
Zn-MnO2
Alkaline
NiMH
Li primary
Ni-Cd
68%
13%
6.5%
6.1%
3.7% Main advantages
Mature technology more than 100 years
Best group property, easy for operation
The highest recycling rate up to 95%
Low cost and high cost performance
More safety and operational reliability
Wide temperature range for operation
Large monomer capacity to 10000AH
Stored Energy Solutions for a Demanding World!
Market forecast of battery Why lead-carbon battery?
According to the forecast, we can find that the technology of lead will dominate market share
**Source: John Craig, BCI, State of the Industry, 124 BCI Convention, Phoenix, AZ (USA), 2012
Market share of batteries for energy storage
Mark
et
perc
en
tag
e (
%)
Lead Lithium Nickel
Stored Energy Solutions for a Demanding World!
Lead carbon = Game changer Why lead-carbon battery?
Lead-Carbon: A Game Changer for Alternative
The current status
The Obama Administration has recently funded scientific
projects for research and development of lead carbon
Applicant Fund Project
Exide Technology with Axion Power 34.3M$
Advanced lead acid battery manufacturing based on lead
carbon technology, meeting the demand for micro & mild HEV
East Penn Manufacturing Co. 32.5M$
Ultra battery manufacturing (combination of lead acid and super capacitor) meeting the demand for micro& mild HEV
Stored Energy Solutions for a Demanding World!
New dimension required Why lead-carbon battery?
In emerging markets, lead-acid batteries need to run in PSOC cycling duty (20% to 80% SOC)
in order to ensure affluent power output and good charge acceptance under these scenarios
100%
80%
20%
0%
1881 1960 1980 Today
Sta
te o
f ch
arg
e
Start Battery
$1.5 Billion
Motive Battery
$3.5 Billion
Standby Battery
$6 Billion
PSOC Battery
New market
Market demand of charging with various duties
Stored Energy Solutions for a Demanding World!
Methods of evaluation Why lead-carbon battery?
Time (minute)
C R
ate
DO
D
Fast utility cycling
Time (hour)
C R
ate
DO
D
Slow energy cycling Cycle life test under PSOC status for utility scale (10% DOD)
VRLA life cycle data (S. Drouihet, B.L. Johnson,1997 NREL)
Depth Of Discharge
Cycl
es
to f
ail
ure
Energy: Low rate
Deep cycling
Utility: High rate
Shallow cycling
Stored Energy Solutions for a Demanding World!
Advantage in Utility model Why lead-carbon battery?
The test result of frequency smoothing simulation on various batteries by Sandia National Laboratories
Cycle life test under PSOC status for utility scale (10% DOD)
Pro
po
rtio
n o
f in
itia
l ca
paci
ty (
%)
Cycles
Wind battery
VRLA battery C&D CPV
Lithium-ion
Lead-carbon
8 times longer!
Time (minute)
C R
ate
DO
D
Utility Model
Stored Energy Solutions for a Demanding World!
Advantage in Energy model Why lead-carbon battery?
Time (hour)
C R
ate
DO
D
Energy Model
The test result of peak-shaving simulation on various batteries by Sandia National Laboratories
Cycle life test under PSOC status for PV hybrid (70% DOD)
Pro
po
rtio
n o
f in
itia
l ca
paci
ty (
%)
Cycles
12 times longer!
80% of initial capacity
Furukawa Lead-carbon
East Penn Lead-carbon
VRLA battery
Stored Energy Solutions for a Demanding World!
Among other lead technologies Why lead-carbon battery?
New batteries Main features
Bipolar lead-acid Lead consumption reduced 50%, high capacity
Bipolar ear spiral Ultra high rate discharge, high energy density
Ceramic membrane Long cyclic life and high efficiency of charging
Foamy graphite To replace lead grid with less lead consumption
Lead-carbon Prolonged lifespan, fast charging, no sulfate
Specific energy Specific power Cyclic lifespan
Lead carbon Other types Lead carbon Other types Lead carbon Other types
Stored Energy Solutions for a Demanding World!
Milestone of lead-carbon Why lead-carbon battery?
Dr. Lam Lan found
that sulfation risk
can be reduced
under HRPSoC
status if carbon
added into the
negative plate
Year 1997 Australian Csiro
has developed out
an ultra-battery
with capacitor and
negative plate
connected in
parallel inside
Year 2000
East penn became
the authorized
manufacturer of
many projects
sponsored by
ALABC for lead-
carbon battery
Year 2006
The utility storage
project of 3.6MWh
from East Penn
has been accepted
by the PJM grid
Year 2012
The R&D program
of lead-carbon
from Exide, Axion,
East penn….has
been financed by
Obama office for
20 million dollars
Year 2009
Stored Energy Solutions for a Demanding World!
Electrical diagram of 3MW storage system
For frequency regulation Why lead-carbon battery?
13.8 KV
Grid
900KW
Inverter
4 strings lead-
carbon battery
3.6MWh storage system for 3MW of
frequency regulation installed by EPM
BESS
Master
Controller
Stored Energy Solutions for a Demanding World!
System development model for energy storage
24 hour period
Batt
ery
sta
te o
f ch
arg
e
Application of lead-carbon Why lead-carbon battery?
Discharging to provide power
reservation or sales of peak price
Charging acceptance during
contingent transmission
Battery in standby operation
with certain residual capacity
For transmission
For power reservation
Core Technologies
Stored Energy Solutions for a Demanding World!
The principle of lead-carbon Lead-carbon technology
The lead-carbon battery is a perfect combination, which contains advantages of high energy capacity and density
from lead-acid battery, as well as high power rate, fast charging and long cyclic lifespan from ultra capacitor
Conventional Lead-acid Internal mixed Lead-carbon Lead and carbon in parallel
Pb
+
C
PbO2 PbO2 PbO2
C
Pb
Pb
Stored Energy Solutions for a Demanding World!
The principle of lead-carbon Lead-carbon technology
Discharge >
Charge >
Pb + HSO4- - 2e
- Pb
2+ + SO4
2- + H
+
PbSO4 precipitation
Dissolution
PbSO4 Pb2+
+ SO42-
+ 2e- + H
+
Dissolution
Pb + HSO4
- precipitation
Pb2+
PbSO4
PbSO4
Pb Pb Pb
Pb
EAC
Pb2+
Pb2+
Pb2+
Pb2+
Pb2+
Lead-acid battery Lead-carbon battery Pb
+
C
Pb PbO2 PbO2
Lead sulfate irreversibly accumulated on surface of the
negative plate into a layer, which is dense and coarse
The sulfation can be successfully restrained, as a result,
the charging acceptance and lifespan can be improved
Stored Energy Solutions for a Demanding World!
Four sorts of lead-carbon Lead-carbon technology
Full carbon in negative
- Long cycle life, high specific power
- Low efficiency of charge & discharge
- Axion Power
Partial carbon in negative
- Excellent long cycle life
- Complicated manufacture
- CSIRO, Furukawa, East Penn
3D carbon in negative
Quite high specific energy & power -
3D structure makes cost quite high -
Firefly Energy, CEA-INES -
Special carbon in negative
Extraordinary HRPSoC cyclic lifespan -
Much easier for industrialization -
Narada authorized by ALABC -
Stored Energy Solutions for a Demanding World!
Failures of lead-acid battery Lead-carbon technology
Pb
Grid
PbSO4
HSO4- HSO4
- HSO4
-
2e-
2e-
H2 H2
H2 H2
Low rate discharge High rate discharge Recharge
Corrosion of positive grid
Cap
aci
ty (
%)
Cycles
Inactivation
of interface
Substance
abscission
Failure of
negatives
Ideal status
Stored Energy Solutions for a Demanding World!
Main functions
More additional locations of nucleation
Intercalation of hydrogen into graphite
Influence of Electro-osmotic pumping
Restriction upon growth of crystalloid
Evolution of hydrogen over impurities
Conductivity & capacitive contribution
Oxidation reaction on carbon surface
The mechanism of carbon Lead-carbon technology
HR
PS
oC
cycl
es
(tim
es)
Particle size (μm)
Act
ive c
arb
on
Carbon
Carbon
Carbon
Carbon
Stored Energy Solutions for a Demanding World!
The mechanism of carbon Lead-carbon technology
--- Provide enough HSO4- and H
+
as a storage container of acid
Acid storage
--- Improve chemical crystallization
Pb2+
PbSO4 during discharging
--- Improve chemical dissolution
PbSO4 Pb2+
during charging
Pb
PbSO4
Grid
Carbon
Conventional battery plate
Battery plate with active carbon
High rate discharge
High rate Charge
High rate discharge
High rate Charge
Stored Energy Solutions for a Demanding World!
The mechanism of carbon Lead-carbon technology
--- Set up 3D structural network, to
provide active positions for PbSO4
Structure builder
--- Inside of conventional electrode,
there are too many spongy lead
--- Inside of lead-carbon electrode,
there are only big & bulky PbSO4
Comparison on surface
Comparison internally
Lead-carbon Conventional
Lead-carbon Conventional
Stored Energy Solutions for a Demanding World!
The phase transition from PbSO4 to Pb --- “R”and adsorptions and desorptions of electric charges ---“C”
The negative plate of lead-carbon battery is just like innumerable R-C micro-circuitry in parallel connection
Initial period of charging Final period of charging Stable period of charging
The mechanism of carbon Lead-carbon technology
Buffer as a capacitor
Stored Energy Solutions for a Demanding World!
Well-chosen components Lead-carbon technology
AGM separator and active carbon
Patented alloy of grid Innovative safety valve
Pre-disperse and formation
Stored Energy Solutions for a Demanding World!
Well-chosen components Lead-carbon technology
Unique carbon formulation in active
substance of negative, which could
restrain sulfate and improve cyclic life
efficiently under partial SOC status
Special carbon material
Made from ultrafine glass fiber with
high strength, which has excellent
ability in absorbability as well as
maintenance of electrolyte material
Special AGM separator
Stored Energy Solutions for a Demanding World!
Well-chosen components Lead-carbon technology
The carbon materials are evenly
dispersed in aqueous solution with
high speed, that successfully makes
lead and carbon particles mixed
Special pre-disperse tech.
After so many experiments, Narada
found out an exclusive procedure of
formation, that can enhance both the
capacity and cyclic life of batteries
Special formation process
Stored Energy Solutions for a Demanding World!
Special carbon formulation Lead-carbon technology
Narada has researched on many materials, such as active carbon, carbon fiber, carbon nanotube, graphene….etc.
Stored Energy Solutions for a Demanding World!
Special carbon formulation Lead-carbon technology
Distribution of pore size Distribution of particle size
Size of particle (μm) Pore size (nm)
Vo
lum
e (
%)
Po
re v
olu
me.
dV
/dD
(cm
3g
-1n
m-1
) 1# 1532m2/g
2# 2435m2/g
Stored Energy Solutions for a Demanding World!
Special carbon formulation Lead-carbon technology
Capacitive features Hydrogen evolution
Cu
rren
t (m
A)
Potential (V v.s Hg/Hg2SO4) Potential (V v.s Hg/Hg2SO4)
Cu
rren
t (m
A)
Stored Energy Solutions for a Demanding World!
Three influence factors of carbon on hydrogen evolution: 1. sort; 2. impurity content; 3. specific surface,
The sort as well as quantity of carbons affect the evolution greatly: the more carbon, the lower over potential
Vo
ltag
e (
V)
Special carbon formulation Lead-carbon technology
Hydrogen evolution affected by different sorts of carbon formulation
AC1 AC2 AC3 Graphite CB
Stored Energy Solutions for a Demanding World!
Special carbon formulation Lead-carbon technology C
urr
en
t (A
)
Potential (V)
Carbon V.S. over potential
Narada carbon
Others carbon
Regular negative
Lead Carbon Fiber
Optimum additive content of carbons
Inhibitors for less hydrogen evolution
Special fibers with better conductivity
Stored Energy Solutions for a Demanding World!
Special carbon formulation Lead-carbon technology
Narada has developed 50 kinds of carbon formulation together with National institute of chemical defense
Narada carbon with special formulation in HRPSoC performance
Dis
charg
e v
olt
ag
e (
V)
Cycles
6 times longer!
Stored Energy Solutions for a Demanding World!
Cyclic performance REXC battery performance
The cyclic performance of 2V200Ah REXC battery between 30% SoC and 80% SoC in peak shaving application
Discharge capacity curves under PSOC status (30%~80%)
Dis
charg
e c
ap
aci
ty (
%)
Cycles
Narada REXC
Conventional
Stored Energy Solutions for a Demanding World!
Cyclic performance REXC battery performance
The cyclic performance of 2V500Ah REXC battery between 80% SoC and 40% SoC in peak shaving application
Discharge capacity curves under PSOC status (80%~40%)
Dis
charg
e c
ap
aci
ty (
%)
Cycles
Narada REXC
Conventional
Stored Energy Solutions for a Demanding World!
High efficiency of conversion REXC battery performance
According to the test result from third party CNAS national lab: Report Number 20121115
which shows that the conversion efficiency of lead carbon (at 80%SOC) can be above 90%
The efficiency comparison of energy conversion under 80% SOC
Eff
icie
ncy
of
en
erg
y c
on
vers
ion
(%
)
Test group
Lead-carbon Conventional Tubular gel
Stored Energy Solutions for a Demanding World!
High rate performance REXC battery performance
Lead-carbon Conventional Tubular gel
Residual capacity curves under PSOC status (80%~40%)
Cycles
Resi
du
al
cap
aci
ty (
%)
According to the test result from third party CNAS national lab: Report Number 20130428,
the PSOC cyclic life of lead-carbon is 5times of tubular gel and 10times of conventional one
Stored Energy Solutions for a Demanding World!
Cyclic performance REXC battery performance
Frequency regulation with profile b-5-cell 400Ah according to IEC 61427-2 Clause 6.2 endurance test
Cyclic life test of IEC 61427-2: 6.2 (Frequency Regulation)
Dis
charg
e v
olt
ag
e o
f 5
cell
s in
seri
es
(V)
Cycles
Maximum charging voltage <2.4Vpc
Minimum discharging voltage >1.8Vpc
Stored Energy Solutions for a Demanding World!
Cyclic performance REXC battery performance
According to INTERTEK test: SH10100844-001 Test Report as well as the IEC61427 solar standard,
Narada lead-carbon can endure more than 16 group tests, which is 5 times of international standard
Residual Capacity of REXC-600 at 80% DOD and C10 condition
Resi
du
al
cap
aci
ty (
Ah
)
Cycles*150
80%DOD and C10
Stored Energy Solutions for a Demanding World!
The Duration test of discharge for Narada REXC-1000 battery in South Africa: routine test of C10
capacity after every 120 cycles, with constant discharging of 100A current till to 2V (end voltage)
The cycle life of lead-carbon battery under 80% DOD
Du
rati
on
of
dis
charg
e (
Min
)
Cycles
Discharging: 100A to 2V
Charging1: 90A to 2.35Vpc
Charging2: 2.35Vpc until 5A
Charging3: 2.35Vpc for 10min
Cyclic performance REXC battery performance
Stored Energy Solutions for a Demanding World!
According to the test result from third party CNAS national lab: Report Number 20111010
which shows that 105% residual capacity remains after 580 group cycles (3500 sub cycles)
Dis
charg
ing
tim
e (
Min
)
Cycles*60
Cyclic performance REXC battery performance
The cycle life of lead-carbon battery under 30% DOD
The end of life with 60% rated capacity as clients request
The end of life with 60% rated capacity as standard
Stored Energy Solutions for a Demanding World!
Cyclic life of lead carbon battery under different DOD
Cycl
e l
ife (
tim
es)
Depth of discharge (DOD)
Cyclic performance REXC battery performance
Stored Energy Solutions for a Demanding World!
Cyclic performance for HEV REXC battery performance
Narada start-stop battery >
Comparison of cyclic performance for HEV application
Lead-carbon Conventional
Ni-NiMH cell
Cycles
En
d o
f d
isch
arg
e v
olt
ag
e (
V)
4 times longer!
Stored Energy Solutions for a Demanding World!
Cyclic performance for HEV REXC battery performance
The cycle life of lead-carbon battery for HEV can reach 250,000 times, far more than 30,000 as standard
Cyclic performance for start-stop batteries (SBA-S0101)
Th
e v
olt
ag
e o
f d
isch
arg
e (
V)
Cycles
Lead-carbon
Conventional A
Conventional B
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High rate performance REXC battery performance
At stimulation of power smoothing, the lifespan reach nearly 180,000 cycles, equivalent to 12 years operation
Cyclic performance under high rate PSOC status
Fin
al
vo
ltag
e o
f d
isch
arg
e (
V)
Cycles
• Discharge at 2C for 15s
• Charge at 2C for 15s
End of discharge voltage 10.3V
Stored Energy Solutions for a Demanding World!
High rate performance REXC battery performance
Mitigated polarization in charge and discharge of lead carbon battery enables the
delivering of enhanced high rate performance as well as high current characteristics
The cell voltage curves during High Rate PSoC cycling
Vo
ltag
e (
V)
Time (s)
Narada REXC
Conventional
600mV
100mV
Stored Energy Solutions for a Demanding World!
High rate performance REXC battery performance
According to the test result from third party INTERTEK: SH12070808-001 Test Result
which shows that the lead-carbon batteries from Narada can be discharged at 10C rate
The discharge performance test under high current
Vo
ltag
e (
V)
Time (s)
10C (750A)
8C (600A)
6C (450A)
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At 50% SOC with a constant voltage of 2.4V at 0˚C, the test result shows the charge acceptance of
Narada lead-carbon battery reaches 2.8, which is higher than target value 2.0 as a standards of BESS
The comparison of charging acceptance performance
Ch
arg
ing
Acc
ep
tan
ce
Test cells
Charging performance REXC battery performance
Lead-carbon Conventional
Stored Energy Solutions for a Demanding World!
According to the test result from third party INTERTEK: SH10100844-001 Test Report, which shows
that the lead-carbon battery of Narada can be 95% charged within 1hour and fully charged in 2hour
Charging performance REXC battery performance
Fast recharging after 100% depth of discharging
Ch
arg
ing
cu
rren
t (A
)
Time (h)
Efficie
ncy
of ch
arg
ing
acce
pta
nce
(%)
Charging capacity
Charging current
Stored Energy Solutions for a Demanding World!
The carbon helps to enlarge the porosity at negative, so as to improve transmission and diffusion of sulfuric acid
inside lead paste. As a result, the HRPSoC performance can be highly improved with higher charging acceptance
Conductance performance REXC battery performance
Carbon Conductivity
AC1 0.33S cm
AC2 0.34S cm
AG 41.16S cm
The conductance of lead-carbon battery
Co
nd
uct
an
ce (
s)
Control AC1 AC2 AG
• The improvement of carbon conductance will enhance battery performance
REXC storage system
Stored Energy Solutions for a Demanding World!
Narada Energy Storage System
Brief introduction
Narda ESS is a smart management system of
energy, ideally for micro-grid solutions, in order
to smooth power, track grid load and shave peak
Stored Energy Solutions for a Demanding World!
Application of Narada ESS Narada ESS introduction
Solar power
Wind power
Traditional Transmission
Auxiliaries
Commercial
Industrial
Residential
Energy consumption Energy production
Energy delivery
Stored Energy Solutions for a Demanding World!
Main 4 sorts of scenarios Narada ESS introduction
Narada ESS system Grid modulation
Island Off-grid
Giant On-grid
Urban Micro-grid
Stored Energy Solutions for a Demanding World!
Narada ESS introduction The diagram of energy system
Batteries PCS
DC combiner
DC
DC
AC
PV array
DC combiner
Inverter
DC
DC
AC
DC
DC
Wind
Diesel
Loads
AC
AC
AC
Transformer
400V 400V 10KV
Stored Energy Solutions for a Demanding World!
• Cells → Modules → String
• Power & Capacity configurable
• To store and release energy
1. Battery pack group
• AC to DC conversion (charge)
• DC to AC conversion (discharge)
2. Power Convert System
• Smart ventilation system
3. Accessories
Structural sections Narada ESS introduction
Stored Energy Solutions for a Demanding World!
24
38
mm
12192mm
REXC-600 batteries
A
C
A
C
A
C
A
C
Thermal management
door Lights Lights
BMS
BMS
Sensor Nozzle
Structural sections Narada ESS introduction
Vertical view of lead-carbon batteries with racks in 40feet container
door door
Thermal management
Stored Energy Solutions for a Demanding World!
Highlights of Narada ESS
BMS
Special BMS control
Smart thermal management
Intelligent SCADA system
Active balance technology
Stored Energy Solutions for a Demanding World!
1. Active balance technology Highlights of Narada ESS
Battery of
big capacity
Battery of
Small capacity
In a battery pack, the one with small capacity will easily get over charge
and over discharge, so the service life of whole pack shall be influenced
Active balance technology
With such technology, the energy could be
transferred and balanced between each battery
in the pack at any time without any energy loss
Stored Energy Solutions for a Demanding World!
Unify battery performance by active balance technology at ay time
> Charging balance > Discharging balance
Longer battery life Easier maintenance Better protection
1. Active balance technology Highlights of Narada ESS
Stored Energy Solutions for a Demanding World!
2. Special BMS control Highlights of Narada ESS
SCADA
BMS
Narada PCS controller
• Highly precise current temperature
• High efficient balance controlling
• Highly precise voltage inspection
• Active balance for heavy current
• Multiple protection for safety
• Practical evaluation of SoC
• Records of historical events
• Better user experience
• Smart BMS interface
• High reliability
Main characters of Narada BMS
Stored Energy Solutions for a Demanding World!
2. Special BMS control Highlights of Narada ESS
Build up a mathematic model for storage system by software, then analyze and calculate to optimize
structural parameter, save response time, prevent influence from harmonics, and to improve power quality
Controlling schematism
PV array
Grid
Controller
Batteries
Charging unit
BMS
Inverter
By pass
Central control
Load
Host PC
Power line
Communication
Stored Energy Solutions for a Demanding World!
3. Thermal management Highlights of Narada ESS
Optimize the operational temperature by the unique ventilation system
Enhance energy availability Unify the performance of each battery
Stored Energy Solutions for a Demanding World!
3. Thermal management Highlights of Narada ESS
Ventilation system
Air condition and inlet
Stored Energy Solutions for a Demanding World!
4. Monitoring platform Highlights of Narada ESS
Real-time monitoring and remote control on the energy storage system
Friendly interface Distributed datalog Multiple protocol Flexible setup
Monitoring system
Ethernet MODBUS TCP/IP
Ethernet IEC104/TEC6158C
Battery units
CAN bus
PCS
Unit detection
Local database
Stored Energy Solutions for a Demanding World!
4. Monitoring platform Highlights of Narada ESS
Interface of Narada SCADA
Residential projects
Stored Energy Solutions for a Demanding World!
• PV generation: 5KWp
• Storage capacity: 24KWh
• Battery type: REXC-500
• Battery quantity: 24pcs
• Project date: 2015.10
Project Details
Residential solution of Narada HESS Perth city, Australia
Stored Energy Solutions for a Demanding World!
• PV generation: 5KWp
• Storage capacity: 12KWh
• Battery type: 12REXC-500
• Battery quantity: 12pcs
• Project date: 2013.08
Project Details
Residential solution of Narada HESS Mount Toolebewong, Australia
Stored Energy Solutions for a Demanding World!
• PV generation: 100KWp
• Storage capacity: 96KWh
• Battery type: REXC-500
• Battery quantity: 96pcs
• Project date: 2014.07
Project Details
Commercial solution of Narada HESS Copenhagen, Denmark
Stored Energy Solutions for a Demanding World!
• PV generation: 3.7KWp
• Storage capacity: 9.6KWh
• Battery type: 6REXC-300
• Battery quantity: 8pcs
• Project date: 2016.03
Project Details
Residential solution of Narada HESS Dover, Great Britain
Stored Energy Solutions for a Demanding World! More references
Residential solution of Narada HESS Dover, Great Britain
Stored Energy Solutions for a Demanding World!
• PV generation: 3KWp
• Storage capacity: 7.2KWh
• Battery type: 6REXC-300
• Battery quantity: 8pcs
• Project date: 2013.10
Project Details
Residential solution of Narada HESS Melbourne, Australia
Stored Energy Solutions for a Demanding World! More references
Residential solution of Narada HESS Melbourne, Australia
Stored Energy Solutions for a Demanding World!
• PV generation: 6KWp
• Storage capacity: 76.8KWh
• Battery type: 12REXC-200
• Battery quantity: 8pcs
• Project date: 2015.07
Project Details
Residential solution of Narada HESS Hangzhou city, Zhejiang, China
Stored Energy Solutions for a Demanding World! More references
Residential solution of Narada HESS Hangzhou city, Zhejiang, China
Stored Energy Solutions for a Demanding World! More references
Residential solution of Narada HESS Hangzhou city, Zhejiang, China
Stored Energy Solutions for a Demanding World!
• PV generation: 6.24KWp
• Storage capacity: 14.4KWh
• Battery type: 6REXC-300
• Battery quantity: 16pcs
• Project date: 2015.04
Project Details
Residential solution of Narada HESS Eaglemont, Australia
Stored Energy Solutions for a Demanding World! More references
Residential solution of Narada HESS Eaglemont, Australia
Large-scale projects
Stored Energy Solutions for a Demanding World!
Xuzhou city, Jiangsu province, China
Industrial storage for GCL-silicon
Project highlights
The first commercialized storage project for enterprises,
which shows economical efficiency of narada batteries
• Storage power: 1.5MWp
• Storage capacity: 12MWp
• Battery type: REXC-1000
• Battery quantity: 6300pcs
• Project date: 2016.09
Stored Energy Solutions for a Demanding World! More references
Xuzhou city, Jiangsu province, China
Industrial storage for GCL-silicon
Stored Energy Solutions for a Demanding World!
Zhenjiang city, Jiangsu province, China
Industrial storage for Acetech
Project highlights
The 2nd commercialized storage project for enterprises,
also shows economical efficiency of narada batteries
• Storage power: 750KWp
• Storage capacity: 8MWp
• Battery type: REXC-1000
• Battery quantity: 4032pcs
• Project date: 2016.12
Stored Energy Solutions for a Demanding World! More references
Katwaria Sarai, New Delhi, India
Energy storage project for Grid India
Stored Energy Solutions for a Demanding World!
Xuzhou city, Jiangsu province, China
Industrial storage for GCL-silicon
Project highlights
The first oversea project of energy storage, which consists
of both Narada lead-carbon battery and lithium battery
• Storage capacity: 1MWh
• Pb-C batteries: 500KWh
• Li-ion batteries: 500KWh
• Function: Frequency modulation
• Project date: 2016.08
Stored Energy Solutions for a Demanding World! More references
Katwaria Sarai, New Delhi, India
Energy storage project for Grid India
Stored Energy Solutions for a Demanding World!
Changping district, Beijing, China
CNR micro-grid demonstration
Project highlights
Two operational modes: On-grid and islanding power to
shift peak load and realize the central energy management
• PV generation: 275KWp
• Storage capacity: 1MWh
• Battery type: REXC-400
• Battery quantity: 350pcs
• Project date: 2013.10
Stored Energy Solutions for a Demanding World! More references
Changping district, Beijing, China
CNR micro-grid demonstration
Stored Energy Solutions for a Demanding World!
Olympic park, Beijing, China
Hanergy FE power station
Project highlights
It generates 70KWh power per day to satisfy electricity demand
for 400 people, that can be installed in half hour by 4 persons
• PV generation: 19.2KWp
• Storage capacity: 144KWh
• Battery type: REXC-1000
• Battery quantity: 72pcs
• Project date: 2014.09
Stored Energy Solutions for a Demanding World! More references
Olympic park, Beijing, China
Hanergy FE power station
Stored Energy Solutions for a Demanding World!
Dong Fushan island, Zhejiang province, China
Guodian PV-wind-diesel & storage
Project highlights
The second largest micro-grid system by 2010, also
equipped with desalinization plants of sea water
• PV generation: 100KWp
• Wind generation: 210KWp
• Battery type: REXC-1000
• Storage capacity: 560KWh
• Project date: 2010.11
Stored Energy Solutions for a Demanding World! More references
Dong Fushan island, Zhejiang province, China
Guodian PV-wind-diesel & storage
Thanks!