Polymer Gel Standby Battery
OPERATION
MANUAL
Ve rs io n：V3.7
NARADA POWER SOURCE CO., LTD.
Website: www.naradabattery.com
EosG Series
Narada Power Source Co., Ltd. EosG series operation manual V3.7
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Content
Safety and warning
Chapter One Product Introduction
1. Product Characters
2. Main application domain
3. Construction
4. Types and Dimensions
Chapter Two Technical characteristic
1. Discharge Curve
2. Charge Performance
3. Choose Battery
4. Internal resistance and short circuit current
Chapter Three Operation and Maintenance
1. Parameters
2. Capacity and Influence Factor
3. Ambient temperature Vs. Battery
4. Requirement for Charge
5. Storage
6. Maintenance
After- sale Service
Annex 1
Narada Power Source Co., Ltd. EosG series operation manual V3.7
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Safety and warning
Please read this manual! It provides very important direction for fix and operation, which can
make best capability for the equipment, and elongate the using life.
z For your safety, please do not try to open it, equipment does not contain spare part. The
maintain work can only be done by our trained woke servitors
z As a result of the battery’s latent endanger to heath and environment, they should be only
changed in our authorization service center. If you need to change the battery or maintain
the equipment, please call the nearest service center.
z Batteries can be reclaimed, if it could not be carefully handled, it would bring a lot of
endangers to environment and heath. Please check laws to get the validity ways or send
the equipment to service center.
z The changer of battery can only be done by person who knows well about the danger and
the prevention. When changing the battery, please use the same model and type sealed gel
battery.
Warning—do not smoke or use fire near batteries。
Warning—do not use organic solvent to wash batteries
Warning—dot not put batteries into the fire, or it may bombed。
Warning—do not open batteries, it contains electrolyte, which can hurt the skin and eyes。
Please take care of the following marks in using
Warning
Electricity
danger
Protecting your eye
Watc h
Short-circuits
With adults custody
Read the
manual
Fire
forbidden
Circle use
Do not put
batteries into
dustbin
The product has past
the UL Safe
authentication
Narada Power Source Co., Ltd. EosG series operation manual V3.7
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Chapter One Product Introduction
1. Product Characters:
z Design life is above 15 years in float application and cycle life is above 1200
times in 80% DOD (Depth of Discharge).
Using the polymer gel electrolyte,
Grid alloy with special patented formula,
4BS paste technology,
Extra-thick plate design;
z Reliable seal performance, recombination efficiency reach 99%
Patented post sealing structure,
“Labyrinth” patented security valve,
High precise ABS sealing technology;
z Initial capacity above 100%, the remaining capacity above 94% when
storage for 3 months (25℃)
z Remarkable high rate discharge performance
Low internal resistance,
Patented grid design,
Large section copper structure;
z Supply the Unique flexible connectors made of rubber wrapped with copper
wires with patented silver-coated ends and another option is copper bar connector.
Assure the good connections of post and connectors and low connection
resistance,
Combination of suppleness and rigidity for more flexible connections,
Monitor hole designed;
z Flexible and convenient installation, slinky outside looking
Shockproof blocking assembling,
Satisfy customer’s individual requirements and provide up to 8-class
shockproof,
Streamline and dime-light battery outside-looking design.
Narada Power Source Co., Ltd. EosG series operation manual V3.7
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2. Main application domain
z Correspondence exchange and transmission system
z Mobile communication system
z Power plant and power transformer system
z Navigation aid signaling system
z Solar energy system
z Radio and broadcasting station
z Emergency lighting system
z Other spare, circulatory system
3. Construction
Narada Power Source Co., Ltd. EosG series operation manual V3.7
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4. Types and Dimensions
Table 1-1 Type specifications
Cell Type
Rated
Voltage
(V)
Rated Capacity
(Ah)
Dimensions (mm)
Weight
(kg)
C10 C3 C1 Length Width Height
Overall
Height
EosG200 2 200 150 110 94.5 184.5 360.5 372 13.5
EosG260 2 260 195 143 109 184.5 360.5 372 17.4
EosG300 2 300 225 165 123 184.5 360.5 372 19.0
EosG400 2 400 300 220 166 184.5 360.5 372 25.0
EosG500 2 500 375 275 194.5 184.5 360.5 372 30.0
EosG600 2 600 450 330 223 184.5 360.5 372 35.5
EosG800 2 800 600 440 154 229 555 566 52.7
EosG1000 2 1000 750 550 186 229 555 566 62.8
EosG1200 2 1200 900 660 225 229 555 566 75.5
EosG1500 2 1500 1125 825 265.5 229 555 566 93
EosG2000 2 2000 1500 1100 349 233 555 566 122
EosG3000 2 3000 2250 1650 496 363 361.7 373.5 175
Chapter Two Technical characteristic
1. Discharge Curve
Fig. 2-1 Discharge Performance Curves at Different Discharge Rates（25℃）
Time (h)
Voltage （V）
Narada Power Source Co., Ltd. EosG series operation manual V3.7
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2. Charge Curve
Fig.2-2 recharge characteristics of 100% DOD EosG500 battery with current of
0.1C10A and limit voltage of 2.35V/Cell (25℃)
1.95
2.05
2.15
2.25
50% DOD
60
40
20
0
840
0.00
0.05
24201612
Charge Time(h)
Charge Current
Charge
Capacity
(%)
120
100
80
Charge Voltage
0.10
2.35
Charge
Voltage
Charge
Current
(CA)
(V)
100% DOD
Charge Capacity
Table2-1 Constant current discharge characteristic (A, 25℃)
EosG200
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 347.6 292.4 208.8 132.0 77.9 57.2 38.8 33.5 26.7 22.2 10.0 5.2 2.8
1.65V 331.2 279.2 200.0 125.2 76.1 55.8 37.8 33.0 26.3 21.9 9.9 5.2 2.8
1.70V 311.2 266.8 184.0 119.6 73.3 54.2 37.5 32.6 25.8 21.6 9.9 5.1 2.7
1.75V 290.4 246.0 171.0 114.0 70.8 52.5 36.5 32.1 25.5 21.3 9.8 5.1 2.7
1.80V 266.5 220.0 160.0 106.8 67.7 50.9 35.6 31.3 25.0 20.8 9.6 5.0 2.6
1.85V 235.9 195.1 142.7 96.4 61.1 48.3 34.4 30.3 24.3 20.2 9.3 4.9 2.5
1.90V 200.4 163.2 122.4 85.6 57.3 45.3 33.1 29.1 23.4 19.6 9.1 4.7 2.4
EosG260
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 455 381 282 173 102.1 75 50.2 43.2 34.6 28.7 12.9 6.5 3.4
1.65V 420 355 270 164 99.8 73.1 49 42.8 34.1 28.4 12.9 6.5 3.4
1.70V 393 333 249 157 96.1 71 48.6 42 33.5 27.9 12.8 6.4 3.3
1.75V 374 315 231 150 92.7 68.7 47.2 41.4 33.1 27.5 12.7 6.3 3.3
1.80V 360 297 216 140 88.7 66.7 46.2 40.5 32.5 26.9 12.5 6.1 3.2
1.85V 319 264 193 127 80.1 63.2 44.6 39.4 31.4 26.2 12 6.0 3.1
1.90V 274 223 165 112 75.1 59.4 42.9 38.1 30.3 25.3 11.8 5.8 3.0
EosG300
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 521.4 438.6 313.2 198.0 116.9 85.8 58.2 50.2 40.0 33.2 15.0 7.8 4.2
1.65V 496.8 418.8 300.0 187.8 114.2 83.7 56.7 49.5 39.5 32.9 14.9 7.7 4.2
1.70V 466.8 400.2 276.0 179.4 110.0 81.3 56.3 48.9 38.8 32.4 14.8 7.7 4.1
1.75V 435.6 369.0 256.5 171.0 106.2 78.7 54.7 48.1 38.3 31.9 14.7 7.6 4.0
1.80V 399.7 330.0 240.0 160.2 101.6 76.3 53.4 46.9 37.6 31.2 14.4 7.5 3.9
1.85V 353.9 292.6 214.0 144.6 91.7 72.4 51.6 45.4 36.5 30.4 13.9 7.3 3.7
1.90V 300.6 244.8 183.6 128.4 86.0 67.9 49.7 43.7 35.1 29.3 13.6 7.1 3.6
EosG400
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 695.2 584.8 417.6 264.0 155.9 114.4 77.6 66.9 53.4 44.3 20.0 10.4 5.6
1.65V 662.4 558.4 400.0 250.4 152.3 111.6 75.7 66.0 52.7 43.8 19.9 10.3 5.6
1.70V 622.4 533.6 368.0 239.2 146.7 108.4 75.0 65.2 51.7 43.2 19.8 10.2 5.5
1.75V 580.8 492.0 342.0 228.0 141.5 105.0 72.9 64.1 51.1 42.6 19.6 10.1 5.3
1.80V 532.9 440.0 320.0 213.6 135.5 101.8 71.3 62.5 50.1 41.6 19.2 9.9 5.2
1.85V 471.9 390.1 285.3 192.8 122.2 96.6 68.8 60.5 48.7 40.5 18.6 9.7 5.0
1.90V 400.8 326.4 244.8 171.2 114.6 90.6 66.3 58.3 46.8 39.1 18.2 9.4 4.8
EosG500
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 869 731 522 330 194.9 143.0 97.0 83.7 66.7 55.4 24.9 13.00 7.06
1.65V 828 698 500 313 190.4 139.5 94.6 82.6 65.8 54.8 24.8 12.90 6.95
1.70V 778 667 460 299 183.3 135.5 93.8 81.5 64.6 54.0 24.7 12.79 6.85
1.75V 726 615 427 285 176.9 131.2 91.2 80.2 63.8 53.2 24.4 12.64 6.66
Narada Power Source Co., Ltd. EosG series operation manual V3.7
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1.80V 666 550 400 267 169.3 127.2 89.1 78.1 62.6 52.0 24.0 12.43 6.45
1.85V 590 488 357 241 152.8 120.7 86.1 75.6 60.8 50.6 23.2 12.14 6.24
1.90V 501 408 306 214 143.3 113.2 82.9 72.8 58.5 48.9 22.7 11.80 5.95
EosG600
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 1042.8 877.2 626.3 396.0 233.8 171.6 116.4 100.4 80.1 66.5 29.9 15.6 8.5
1.65V 993.6 837.6 599.9 375.6 228.4 167.4 113.5 99.1 79.0 65.8 29.8 15.5 8.3
1.70V 933.6 800.4 551.9 358.8 220.0 162.5 112.5 97.7 77.5 64.8 29.7 15.4 8.2
1.75V 871.2 738.0 512.9 342.0 212.3 157.5 109.4 96.2 76.6 63.8 29.3 15.2 8.0
1.80V 799.4 659.9 480.0 320.4 203.2 152.7 106.9 93.8 75.1 62.4 28.9 14.9 7.7
1.85V 707.8 585.2 428.0 289.2 183.3 144.9 103.3 90.8 73.0 60.7 27.9 14.6 7.5
1.90V 601.2 489.6 367.2 256.8 171.9 135.9 99.4 87.4 70.2 58.7 27.3 14.2 7.1
EosG800
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 1164.0 979.5 795.9 524.5 323.0 237.1 155.0 133.6 104.6 85.7 39.7 21.2 11.9
1.65V 1091.5 921.9 725.9 495.1 313.8 230.7 153.1 132.0 103.7 85.3 39.2 21.1 11.7
1.70V 1025.9 872.4 663.8 470.4 303.0 220.4 149.3 128.8 102.2 83.9 39.0 20.9 11.5
1.75V 967.7 821.1 612.1 441.0 291.9 215.3 146.7 126.9 100.8 83.2 38.7 20.6 11.2
1.80V 914.2 765.8 573.1 418.4 283.1 208.6 142.4 123.5 98.1 82.1 37.8 20.3 10.9
1.85V 784.9 651.4 503.8 372.5 255.2 193.1 134.4 117.6 94.9 78.8 36.7 19.3 10.5
1.90V 642.9 514.3 418.7 306.1 213.3 171.7 121.7 106.1 85.6 71.8 34.3 18.0 9.7
EosG1000
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 1455.0 1224.3 994.9 655.6 403.7 296.4 192.8 166.1 130.1 106.6 49.4 26.4 14.8
1.65V 1364.4 1152.4 907.3 618.8 392.3 288.4 190.4 164.2 128.9 106.0 48.7 26.2 14.6
1.70V 1282.3 1090.5 829.7 588.0 378.8 275.5 185.7 160.2 127.1 104.4 48.5 26.0 14.4
1.75V 1209.6 1026.4 765.1 551.2 364.9 269.2 182.5 157.8 125.3 103.5 48.1 25.7 14.0
1.80V 1142.8 957.3 716.3 523.0 353.9 260.8 177.1 153.6 122.0 102.1 47.1 25.2 13.5
1.85V 981.2 814.2 629.8 465.6 319.0 241.4 167.1 146.3 118.0 97.9 45.7 24.0 13.1
1.90V 803.6 642.9 523.3 382.7 266.7 214.6 151.4 132.0 106.4 89.3 42.7 22.4 12.1
EosG1200
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 1744.3 1467.7 1192.7 786.0 484.5 355.7 232.5 200.8 157.2 128.9 59.7 31.9 17.9
1.65V 1635.7 1381.5 1087.7 741.8 470.7 346.1 229.7 198.4 155.8 128.2 58.9 31.6 17.6
1.70V 1537.2 1307.3 994.7 704.9 454.6 330.6 223.9 193.6 153.6 126.1 58.6 31.4 17.3
1.75V 1450.1 1230.5 917.2 660.8 437.8 323.0 220.1 190.7 151.5 125.1 58.1 31.0 16.9
1.80V 1370.0 1147.6 858.7 626.9 424.7 312.9 213.6 185.7 147.4 123.4 56.9 30.5 16.3
1.85V 1176.2 976.1 755.0 558.2 382.8 289.7 201.6 176.8 142.6 118.4 55.2 29.0 15.8
1.90V 963.3 770.7 627.4 458.8 320.0 257.5 182.5 159.5 128.6 107.9 51.6 27.1 14.6
EosG1500
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 2182.6 1836.5 1492.4 983.5 605.6 444.6 287.8 247.9 194.1 159.2 73.8 39.4 22.1
1.65V 2046.7 1728.6 1361.0 928.2 588.4 432.6 284.2 245.0 192.4 158.3 72.7 39.1 21.8
Narada Power Source Co., Ltd. EosG series operation manual V3.7
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1.70V 1923.5 1635.8 1244.6 882.0 568.2 413.2 277.1 239.1 189.7 155.8 72.4 38.8 21.4
1.75V 1814.5 1539.6 1147.6 826.8 547.3 403.7 272.4 235.5 187.1 154.5 71.7 38.3 20.8
1.80V 1714.2 1435.9 1074.5 784.5 530.8 391.2 264.3 229.3 182.0 152.4 70.2 37.6 20.2
1.85V 1471.7 1221.4 944.7 698.4 478.5 362.1 249.4 218.3 176.2 146.2 68.2 35.8 19.5
1.90V 1205.4 964.3 785.0 574.0 400.0 321.9 225.9 197.0 158.8 133.2 63.7 33.5 18.0
EosG2000
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 2910.1 2448.6 1989.8 1311.3 807.5 592.8 383.7 330.6 258.8 212.2 98.3 52.5 29.4
1.65V 2728.9 2304.8 1814.7 1237.7 784.5 576.9 379.0 326.6 256.6 211.0 96.9 52.1 29.0
1.70V 2564.6 2181.0 1659.5 1176.0 757.6 550.9 369.5 318.8 252.9 207.7 96.5 51.7 28.6
1.75V 2419.3 2052.9 1530.2 1102.5 729.7 538.3 363.2 314.1 249.4 205.9 95.7 51.0 27.8
1.80V 2285.6 1914.5 1432.7 1045.9 707.8 521.6 352.4 305.7 242.7 203.2 93.6 50.2 26.9
1.85V 1962.3 1628.5 1259.5 931.2 638.0 482.8 332.6 291.1 234.9 194.9 90.9 47.8 26.0
1.90V 1607.1 1285.7 1046.6 765.4 533.3 429.2 301.2 262.6 211.8 177.6 84.9 44.6 24.0
EosG3000
EV/cell 5min 15min 30min 1h 2h 3h 5h 6h 8h 10h 24h 48h 100h
1.60V 4365.1 3672.9 2984.7 1966.9 1211.2 889.2 575.5 495.9 388.2 318.3 147.5 78.8 44.2
1.65V 4093.3 3457.1 2722.0 1856.5 1176.8 865.3 568.4 490.0 384.9 316.5 145.4 78.1 43.5
1.70V 3846.9 3271.6 2489.2 1764.0 1136.4 826.4 554.2 478.1 379.3 311.6 144.8 77.5 42.8
1.75V 3628.9 3079.3 2295.2 1653.7 1094.6 807.5 544.7 471.1 374.1 308.9 143.5 76.6 41.7
1.80V 3428.4 2871.8 2149.0 1568.9 1061.7 782.4 528.6 458.6 364.1 304.8 140.5 75.3 40.4
1.85V 2943.5 2442.7 1889.3 1396.8 957.0 724.2 498.9 436.7 352.3 292.4 136.4 71.6 39.0
1.90V 2410.7 1928.6 1570.0 1148.0 800.0 643.9 451.8 393.9 317.7 266.4 127.4 66.9 36.0
Table2-2 discharge data with constant power (Watts/cell, 25℃)
EosG200
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 573.8 480.6 382.7 270.6 174.6 129.3 103.1 85.4 73.0 57.0 46.6 21.0
1.65V 545.8 461.2 362.0 250.0 160.2 121.4 97.8 82.4 70.6 54.9 45.4 20.6
1.70V 524.7 444.8 352.9 238.1 155.5 117.1 94.5 80.6 69.2 53.7 44.1 20.2
1.75V 508.3 428.1 340.9 228.8 150.0 112.7 92.5 78.6 67.6 51.7 43.4 20.0
1.80V 494.3 408.1 328.9 223.5 147.2 108.8 89.5 76.4 65.7 50.4 42.8 19.7
1.85V 449.5 371.6 292.4 203.3 135.3 103.0 86.1 72.8 62.2 48.7 41.1 18.9
1.90V 396.7 322.5 246.7 175.1 117.4 95.5 80.1 68.0 58.1 45.6 38.1 17.7
EosG260
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 828 697.3 533.2 332.7 200.1 146.9 114.5 99.9 86 68.8 58 26.1
1.65V 765 650 510.8 315.5 195.5 143.3 113.3 97.5 85.1 67.8 57.4 26.1
1.70V 715.1 609.5 469.9 301.4 188.3 139.1 111.3 96.7 83.6 66.6 56.4 25.9
1.75V 681.5 577 436.8 287.3 181.7 134.7 109.7 93.9 82.4 65.8 55.6 25.7
1.80V 655.5 544 408.6 269.3 173.9 130.7 107.3 91.9 80.6 64.6 54.4 25.2
1.85V 580.4 482.5 364.4 243 156.9 124 104.5 88.7 78.5 62.6 52.9 24.2
Narada Power Source Co., Ltd. EosG series operation manual V3.7
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1.90V 499 407.9 312.6 215.8 147.1 116.4 100.9 85.5 75.8 60.4 51.1 23.8
EosG300
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 853.9 715.1 569.4 402.6 259.8 192.4 153.5 127.1 108.6 84.8 69.3 31.2
1.65V 812.1 686.3 538.6 372.0 238.3 180.6 145.6 122.7 105.1 81.7 67.6 30.6
1.70V 780.8 661.9 525.2 354.3 231.4 174.2 140.6 119.9 103.0 79.9 65.6 30.0
1.75V 756.4 637.1 507.3 340.5 223.2 167.8 137.7 116.9 100.7 77.0 64.6 29.8
1.80V 735.5 607.2 489.4 332.6 219.1 161.8 133.2 113.7 97.7 75.0 63.7 29.3
1.85V 668.9 553.0 435.1 302.5 201.3 153.3 128.1 108.4 92.5 72.5 61.2 28.1
1.90V 590.3 479.9 367.0 260.5 174.7 142.1 119.3 101.3 86.4 67.9 56.7 26.3
EosG400
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 1147.7 961.2 765.4 541.2 349.2 258.6 206.3 170.8 145.9 114.0 93.1 42.0
1.65V 1091.5 922.4 723.9 500.1 320.3 242.7 195.6 164.9 141.3 109.8 90.9 41.2
1.70V 1049.4 889.7 705.9 476.2 311.0 234.1 189.0 161.2 138.5 107.4 88.2 40.4
1.75V 1016.7 856.3 681.8 457.6 300.0 225.5 185.0 157.2 135.3 103.5 86.9 40.0
1.80V 988.6 816.2 657.7 447.0 294.5 217.5 179.1 152.8 131.3 100.8 85.6 39.4
1.85V 899.0 743.3 584.9 406.5 270.6 206.0 172.2 145.6 124.4 97.5 82.2 37.8
1.90V 793.4 645.0 493.3 350.2 234.8 191.0 160.3 136.1 116.2 91.2 76.3 35.4
EosG500
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 1434.6 1201.5 956.7 676.5 436.5 323.3 257.8 213.6 182.4 142.6 116.4 52.5
1.65V 1364.4 1153.0 904.9 625.1 400.4 303.4 244.6 206.1 176.6 137.3 113.6 51.5
1.70V 1311.8 1112.1 882.3 595.2 388.8 292.6 236.3 201.4 173.1 134.3 110.3 50.5
1.75V 1270.8 1070.3 852.2 572.0 375.0 281.9 231.3 196.5 169.1 129.3 108.6 50.0
1.80V 1235.8 1020.2 822.2 558.7 368.1 271.9 223.8 191.0 164.1 126.0 106.9 49.2
1.85V 1123.8 929.1 731.1 508.2 338.2 257.5 215.2 182.0 155.4 121.9 102.8 47.3
1.90V 991.8 806.3 616.6 437.7 293.5 238.8 200.4 170.1 145.2 114.0 95.3 44.3
EosG600
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 1706.0 1428.8 1137.7 804.5 519.0 384.5 306.6 254.0 216.9 169.5 138.4 62.4
1.65V 1622.6 1371.2 1076.1 743.3 476.2 360.8 290.8 245.1 210.0 163.3 135.1 61.2
1.70V 1560.0 1322.5 1049.3 707.8 462.4 348.0 281.0 239.6 205.8 159.7 131.1 60.0
1.75V 1511.3 1272.8 1013.5 680.2 446.0 335.2 275.1 233.6 201.1 153.8 129.1 59.4
1.80V 1469.6 1213.2 977.7 664.5 437.7 323.4 266.2 227.1 195.2 149.8 127.2 58.6
1.85V 1336.4 1104.9 869.4 604.3 402.2 306.2 255.9 216.5 184.8 144.9 122.2 56.2
1.90V 1179.4 958.8 733.3 520.5 349.0 283.9 238.3 202.3 172.7 135.6 113.4 52.6
EosG800
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 2272.4 1903.2 1515.4 1079.1 696.3 515.7 411.3 340.7 290.9 227.4 185.7 83.7
1.65V 2161.3 1826.4 1433.3 997.1 638.7 484.0 390.1 328.8 281.7 219.0 181.2 82.1
1.70V 2077.9 1761.6 1397.6 949.5 620.2 466.8 376.9 321.3 276.1 214.2 175.9 80.5
1.75V 2013.0 1695.4 1350.0 912.5 598.3 449.6 369.0 313.4 269.8 206.3 173.2 79.7
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1.80V 1957.4 1616.0 1302.3 891.3 587.2 433.8 357.1 304.7 261.8 201.0 170.6 78.6
1.85V 1780.1 1471.7 1158.1 810.6 539.5 410.7 343.3 290.4 248.0 194.4 164.0 75.4
1.90V 1571.0 1277.2 976.7 698.2 468.1 380.9 319.6 271.4 231.7 181.9 152.1 70.6
EosG1000
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 2840.5 2379.0 1894.2 1348.9 870.3 644.7 514.1 425.8 363.7 284.3 232.1 104.6
1.65V 2701.6 2283.0 1791.7 1246.4 798.4 605.0 487.6 410.9 352.1 273.7 226.5 102.7
1.70V 2597.3 2202.0 1747.0 1186.9 775.3 583.5 471.1 401.7 345.2 267.8 219.9 100.7
1.75V 2516.3 2119.2 1687.4 1140.6 747.8 562.0 461.2 391.8 337.2 257.9 216.5 99.7
1.80V 2446.8 2020.0 1627.9 1114.1 733.9 542.2 446.3 380.9 327.3 251.3 213.2 98.2
1.85V 2225.1 1839.6 1447.6 1013.3 674.4 513.4 429.1 363.0 309.9 243.0 205.0 94.2
1.90V 1963.7 1596.5 1220.9 872.8 585.2 476.1 399.5 339.2 289.6 227.3 190.1 88.3
EosG1200
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V
3401.8 2849.1 2268.5 1615.4 1042.3 772.1 615.7 510.0 435.5 340.4 277.9 125.3
1.65V
3235.4 2734.1 2145.7 1492.7 956.2 724.6 584.0 492.1 421.7 327.8 271.3 122.9
1.70V
3110.6 2637.1 2092.2 1421.4 928.5 698.8 564.2 481.1 413.4 320.7 263.3 120.6
1.75V
3013.5 2538.0 2020.9 1366.0 895.6 673.1 552.3 469.2 403.9 308.8 259.3 119.4
1.80V
2930.3 2419.1 1949.6 1334.3 879.0 649.3 534.5 456.1 392.0 300.9 255.4 117.6
1.85V
2664.8 2203.2 1733.6 1213.5 807.7 614.9 513.9 434.7 371.2 291.0 245.5 112.8
1.90V
2351.8 1911.9 1462.2 1045.3 700.8 570.1 478.5 406.2 346.8 272.2 227.7 105.7
EosG1500
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 4239.5 3550.6 2827.2 2013.2 1299.0 962.2 767.3 635.5 542.8 424.3 346.4 156.2
1.65V 4032.1 3407.4 2674.1 1860.2 1191.6 903.0 727.8 613.3 525.5 408.6 338.1 153.2
1.70V 3876.5 3286.4 2607.4 1771.4 1157.1 870.9 703.1 599.5 515.1 399.7 328.1 150.2
1.75V 3755.5 3163.0 2518.5 1702.3 1116.1 838.8 688.3 584.7 503.3 384.9 323.2 148.8
1.80V 3651.8 3014.8 2429.6 1662.9 1095.4 809.2 666.1 568.4 488.5 375.0 318.3 146.5
1.85V 3321.0 2745.7 2160.5 1512.4 1006.6 766.3 640.5 541.8 462.6 362.7 305.9 140.6
1.90V 2930.9 2382.7 1822.2 1302.7 873.4 710.5 596.3 506.3 432.2 339.3 283.7 131.7
EosG2000
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 5635.6 4719.9 3758.2 2676.2 1726.7 1279.0 1020.0 844.8 721.5 564.0 460.5 207.6
1.65V 5359.9 4529.5 3554.7 2472.8 1584.1 1200.3 967.5 815.3 698.6 543.1 449.4 203.7
1.70V 5153.1 4368.7 3466.1 2354.8 1538.1 1157.7 934.7 796.9 684.8 531.3 436.2 199.7
1.75V 4992.3 4204.6 3347.9 2262.9 1483.7 1115.1 915.0 777.3 669.0 511.6 429.6 197.8
1.80V 4854.4 4007.6 3229.7 2210.5 1456.1 1075.7 885.5 755.6 649.4 498.5 423.1 194.8
1.85V 4414.6 3649.9 2872.0 2010.4 1338.1 1018.6 851.4 720.2 614.9 482.1 406.7 186.9
1.90V 3896.0 3167.4 2422.3 1731.6 1161.0 944.5 792.7 673.0 574.6 451.0 377.2 175.1
EosG3000
End voltage
per cell
5min 15min 30min 1h 2h 3h 4h 5h 6h 8h 10h 24h
1.60V 8453.4 7079.8 5637.3 4014.2 2590.1 1918.6 1529.9 1267.2 1082.3 845.9 690.7 311.4
1.65V 8039.9 6794.3 5332.0 3709.2 2376.1 1800.5 1451.2 1223.0 1047.8 814.7 674.2 305.5
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1.70V 7729.7 6553.0 5199.1 3532.1 2307.2 1736.6 1402.0 1195.4 1027.2 796.9 654.3 299.6
1.75V 7488.5 6306.8 5021.8 3394.4 2225.5 1672.6 1372.5 1165.9 1003.6 767.4 644.4 296.6
1.80V 7281.7 6011.4 4844.6 3315.7 2184.2 1613.6 1328.2 1133.4 974.0 747.8 634.6 292.2
1.85V 6621.9 5474.8 4308.0 3015.6 2007.1 1528.0 1277.1 1080.3 922.4 723.2 610.0 280.4
1.90V 5844.0 4751.1 3633.5 2597.4 1741.5 1416.8 1189.0 1009.5 861.9 676.5 565.7 262.7
3. Choose Battery
Please select batteries’ capacity according to Fig. 2-3 Selection Curve of Cell Type.
1) First confirm the discharge current and end voltage.
E.g., required end voltage is 1.80V/cell.
2) Confirm the continual working time and discharge current.
E.g., the continual working time is 3 hours, and the discharge current is 125A .You
should choose the minimum capacity is EosG500Ah
3) Confirm the environmental
When the ambient temperature is 25℃, you should choose EosG500.Or you should
confirm the temperature coefficient according to the Fig.3-1. If the temperature is below 0℃,
there leaves 85% capacity compared with that at 25℃.Then you should divide by 0.85.
4) To ensure the life of the battery, please don not discharge the depth of battery too much.
You'd better control the DOD below the 80%, especially in the power shortage areas.
Fig. 2-3 Selection Curve of Cell Type（end voltage per cell 1.80V）
4. Internal resistance and short circuit current
The internal resistance of the battery is a dynamic nonlinear parameter that is
continuously changed along with the temperature and discharge state. The internal resistance
is the lowest when battery is fully charged. The table 2-3 shows the internal resistance and
short circuit current of Narada battery in fully charged state according to the IEC60896
standard. Pay attention to the battery to short-circuit causes the battery voltage to reduce to 0V,
1000
100
10
EosG260
2h
10h
EosG2000
EosG1500
EosG1000
EosG800
EosG600
EosG500
EosG400
EosG300
EosG200
Dischargetime
3500
2000
500
50
300
200
30
20
5
1.5h1h
24h
12h5h
20min10min5min
Dischargecurrent(A)
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and will cause the battery internal component damage.
Table2-3 Internal resistance and short circuit current (25℃)
Type
Internal Resistance
（mΩ）
Short Circuit Current
（A）
EosG200 0.66 3098
EosG260 0.53 3560
EosG300 0.48 4025
EosG400 0.34 5231
EosG500 0.33 6083
EosG600 0.28 7196
EosG800 0.22 9024
EosG1000 0.18 10712
EosG1200 0.17 12068
EosG1500 0.15 14002
EosG2000 0.11 17325
EosG3000 0.10 21300
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Chapter Three Operation and Maintenance
1. Parameters
The EosG series batteries can be used in -40 ~ ℃ 50 environment, the recommendation ℃
suitable temperature is 15 ~ 25 .℃℃ Using under the high or low temperature, can reduce the
battery life. The next table is taking the 48V system as an example. The switching power
supply parameter reference establishment value, different uses electricity the environment
battery electric discharge. Because of the frequently power cut in the environment in four kind
and above four kinds, the battery discharges frequently punishes at the same time in the
sufficient insufficient condition. Therefore needs to enhance the floating voltage and the
charging current by causes the battery in the short time the sufficient electricity. The user acts
according to the locus the power supply category comparative table 3-1. The solar system
parameter establishment is table 3-2.
Table3-1 Switching power supply parameter establishment table
Parameter name
Below four kinds supplies
power
Four kind and above four
kinds supplies power
Floating Voltage（V） 54 54
Equalization Voltage（V） 56.4 56.4
Charging Current（A） 0.1C10 0.1C10
Limited Current For Charge （A） 0.2C10 0.2C10
High Voltage Warning（V） 57.6 57.6
Low Voltage Warning（V） 46 47
Temperature Compensate Ratio With
Floating Voltage
（mV/℃per cell）
-3 -3
Temperature Compensate Ratio With
Equalization Voltage
（mV/℃per cell）
-5 -5
High Temperature Warning（℃） 35 35
LVDS Broke Voltage（V） 44 45
LVDS Recover Voltage（V） 49 50
Equalization Charge Cycle（day） 90 30
Equalization Charge Time（h） 24 24
Condition TO Change Float Charge
To Equalization Charge
（mA/Ah）
＞50 ＞50
Condition To Stop Equalization
Charge
（mA/Ah）
＜5 ＜5
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Table3-2 Solar system parameter establishment table
Parameter name Recommendation parameter（reference）
The largest depth of discharge of system < 80％
Protection voltage of over discharge 1.95V/cell
The depth of discharge per day 10％－30％
The optimum charge current（A） 0.1C10
The largest charge current（A） 0.25C10
Equalization voltage（25℃）
2.40V/cell
，Condition to equalization charge to
float charge is charge current below
6mA/Ah(or break away controller)
Float voltage 2.25V/cell
Temperature compensate radio with
float charge voltage
（mV/ /cell℃ ）
-3
Temperature compensate radio with
equalization charge voltage
（mV/ /cell℃ ）
-5
The factor of over capacity of system
The continues overcast and rainy days a year
The coefficient of capacity & life is 1.25
The coefficient of capacity in winter
temperature, reference to Fig 3-1
2. Capacity and Influence Factor
The capacity of battery is the capacity that battery can be discharged on the established
conditions, expressed as signal C. The usual unit of capacity is ampere-hour, shortened as AH.
The capacity can be expressed in Rated Capacity or Actual Capacity. The Rated Capacity of
EosG battery please see Table 1-1. The Actual Capacity is the product of the discharge current
and the discharge time, the unit is AH.
3. Ambient temperature Vs. Battery
Temperature affects capacity of the battery. Fig. 3-1 is the available capacity (10h rate) curve
vs. ambient temperature. From Fig. 3-1, if the temperature is too low, the capacity will
decrease. For example, the capacity will decrease 20% if temperature decreases form 25 ℃ to
0℃; And too low temperature will cause battery long term insufficient charged, also will cause
no discharge and negative plates sulfate.
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The capacity will increase when temperature rises. For example the capacity will increase 5%
if temperature raise 10 . But it wi℃ ll quicken up plates’ corrosion and water loss if temperature
rises, shortens battery’s life.
Fig.3-1 Available Capacity (10h rate) Curve VS. Ambient Temperature
z
Temperature and Floating Voltage, Equalization voltage
The purpose of choosing certain floating voltage is to reach the designed life and rated
capacity of the battery. If the floating voltage is higher, then the floating current is also higher;
it will accelerate the corruption the grid and shorten the life of the battery. If the floating
voltage is lower, the battery can’t be kept in fully charged state, this will crystallize PbSO4,
decrease the capacity, and also shorten the life of the battery.
At 25℃, if the floating voltage is 2.25V/cell, In other degree, please adjust according to Table
3-2. Polymer gel battery need to carry the equalizing charge regularly, in order to guarantees
the battery normal operation. At 25 ,℃ NARADA battery’ s Equalization voltage is 2.35V～
2.40V/cell. It needs to be changed by ambient temperature, the temperature compensation
coefficient is-5mV/ /cell.℃
Table 3-2 Relationship of ambient temperature and voltage
Ambient
Temperature
()℃
Float Voltage
（V/cell）
Equalization
voltage（V/cell）
5 2.31 2.45
10 2.30 2.43
15 2.28 2.40
20
2.27 2.38
C
ap
ac
it
y
Ambient Temperature（℃）
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25
2.25 2.35
30
2.24 2.33
35
2.22 2.30
40
2.21 2.28
Fig.3－2 The Voltage Setting Curve Vs. Ambient Temperature
0 5 10 15 20 25 30 35 40 45
2.20
2.24
2.28
2.32
2.36
2.40
2.44
Equalization Charge
Floating Charge
Voltage（ V ）
Temperature（ ℃）
z
Ambient temperature Vs. Battery Life
The heat disseminates performance of VRLA battery is bad, it’s liable to cause heat run away
when heat accumulates. When temperature exceeds 25℃, the battery life will decrease half per
10℃ temperature raise.
L25＝LT×2
（T－25）
/10
Notes：T the actual ambient temperature;
LT is designed life at T ambient temperature
L25 is designed life at 25 ambient tempe℃ rature
Ambient temperature elevating, also will accelerate the battery slab lattice corrosion and the
battery moisture content loss, thus will greatly reduce the battery the life. So suppose to
control the ambient temperature, after the quantity of heat accumulating to the certain degree
can damage the battery, seriously will be able to cause hotly loses control. If indoor
temperature reaches too high, improves the ambient temperature. The battery spacing cannot
to be lower than 10mm, at the same time according to handbook request regulating cell
floating and Equalization voltage value.
4. Requirement for Charge
z Equalization Charge
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The battery needs an equalization charge floating operation over three months, and the voltage
of at least two batteries are lower than 2.18V. The method of equalization charge is suggested
as follows: Charge with 2.35V/Cell for 24 hours, limiting 0.1C10A～0.2C10A, when the
average voltage raise to Equalization voltage, charge by Equalization voltage for 24hours.
z Charge
After discharge, the batteries should be charged in time. The method is recommended as
Charge with 2.35V/Cell for 24 hours, limiting 0.1C10A～0.2C10A.
Whether the batteries are fully charged can be decided according to any one of two standards
as follows:
1. See following table, table3-3 is in different discharge, the time need for 0.1C
10
A an d
0.2C10A ba tter y.
2. On condition of constant voltage, the value of charge current hasn’t varied for
continuous three hours.
Fig. 3-3 the relationship between DOD and charge time
5. Storage
All gel batteries experience self-discharge in open circuit. The result is that the voltage of open
circuit is decreased, and the capacity also decreased. During storage please note:
— The self-discharge rate is related with ambient temperature. The self-discharge degree
is smaller when the ambient temperature is lower, otherwise is larger. The requirement
temperature of Narada EosG batteries’ storage environment is from 0℃ to 35℃. The
storage place must be clean, ventilated and dry.
— An important parameter in storage is open circuit voltage, which is related with
density of electrolyte. In order to avoid permanent damage to the plate caused by
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self-discharge, the batteries should be supplemental charged as storage period shown
in following table. The equalization charge method should be adopted.
Storage temperature Max. Storage period
Above 30℃ 3 months
Below 30℃ 6 months
— During storage, if the open circuit voltage is lower than 2.10V/Cell, the batteries
should be supplementary charged before use. The equalization charge method should
be adopted.
— All batteries, which are ready to store, should be fully charged before storage. It’s
suggested record the storage time in the periodic maintenance record and record the
time when another necessary supplementary charge should be made.
The quality certificates of EosG batteries record the latest charge time of the batteries,
next charge time can be calculated according to this charge time.
6. Maintenance
In order to assure service life, the batteries should be correctly inspected and maintained.
The maintenance methods of EosG batteries are recommended as follows:
z Monthly Maintenance
Implement the under-mentioned inspection every month:
— Keep the battery-room clean.
— Measure and record the ambient temperature of the battery-room.
— Check each battery’s cleanness; check damage and overheating trace of the terminal,
container and lid.
— Measure and record the total voltage and floating current of the battery system.
z Quarterly Maintenance
— Repeat monthly inspection.
Measure and record floating voltage of every on-line battery. If more than two cells’
voltage is less than 2.18V after temperature adjustment, the batteries need to be equalization
charged. If the problem still exists after adopting above-mentioned measures, the batteries
need yearly maintenance or even three years’ maintenance. If all methods are ineffective,
please contact us
z Yearly Maintenance
— Repeat quarterly maintenance and inspection.
— Check whether connectors are loose or not every year.
Make a discharge test to check with exact load every year, discharging 30-40% of rated
capacity. Make a capacity test every three years and every year after six years’ operation. If the
capacity of the battery decreases to lower than 80% of rated capacity, the battery should be
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replaced.
z Operation and Maintenance Precautions
Insufficient Charge
If the floating voltage is not set correctly (too low or not amend according to temperature),
the battery system will in an insufficient charge state for a long period of time. When the
electricity is out, the battery may not be able to work.
Over Charge
Please do not neglect the performance of rectify to transfer floating charge to equalization
charge. If the rectify cannot transfer charge modes because of its wrong performance or no
adjustment, the battery system is always in an equalization charge state. Thus may cause
serious problems for battery, such as water loss, life decrease, heat out of control,
deformation, etc.
Too low or too high temperature
We have mentioned that too low temperature will affect the capacity of battery. While too
high temperature will also cause problems, such as water loss, life decrease, heat out of
control, deformation, etc.
Too low end voltage
The end voltage is also an important parameter for battery. The battery shall stop
discharge when reach a certain voltage (The normal end voltage is 1.8V). If the end
voltage is too low, it will be difficult to recharge the battery and decrease the charge
efficiency, thus reduce the life of battery.
Long time after discharge
If the battery is put aside without charge for a long time (2 hours above) after discharge, it
will affect the capacity and life of the battery. Because some large size PbSO4 will create
in the negative which are difficult to transfer to active Pb.
After-sales Service / Customer Service Hotline
P.R. China: Asia Pacific:
Narada Power Source Co., Ltd.
9F, Building A, No. 50 Zijinghua Road,
Hangzhou, China
Tel: +86-571-28827013
Fax: +86-571-28828290
E-mail: intl@narada.biz
Website: www.naradabattery.com
NARADA ASIA PACIFIC PTE.LTD.
65 Ubi Crescent #07-05 Hola centre,
Singapore
Tel: +65-6848 1191
Fax: +65-6749 3498
E-mail: sales@narada.com.sg
EosG series operation manual – V3.7 –N- EN 2013– Subject to revisio without prior notice E.&O.E.
Narada Power Source Co., Ltd. EosG series operation manual V3.7
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VRLA Battery Regular Maintenance Record
Type Place
Status Number of battery
Total Voltage（V） Current (A) Temperature
No. Voltage（V） No. Voltage（V）
1 13
2 14
3 15
4 16
5 17
6 18
7 19
8 20
9 21
10 22
11 23
12 24
Check by sight
Result：
Tester: Date:
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