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Sunica.plus Ni-Cd batteries
4.3. Cell electrolyte after prolonged float
charge:
Check the electrolyte level and adjust it to the
upper level mark by adding distilled or
deionized water.
Note: When full battery performance is
required for capacity test purposes, the
battery has to be charged in accordance
with IEC 62259 section 7 (7.1 & 7.2).
5. Charging in service
The photovoltaic array converts solar
irradiance into DC electrical power at a pre-
determined range of voltages whenever
sufficient solar radiation is available. Unlike a
main connected system, the output from a
photovoltaic array is variable and, to obtain
the best efficiency from the system, it is quite
normal to have some form of charge control.
Two main techniques for charging the
batteries are generally used in photovoltaic
systems.
These are those which have a constant
voltage limitation based on the PWM technics
and those with several voltage steps charging
where the battery, by switching means, is
charging up to a high pre-set voltage (boost
or float threshold), then drops to a lower
voltage level (battery reconnect threshold)
and then back to the high pre-set voltage
and so on.
Recommended charging voltages for a typical
photovoltaic application sized for
5 days or more back up time:
a) case of constant voltage limitation (PWM
regulator system or similar)
• float: 1.50 V/cell
• boost (not mandatory): 1.65 V/cell
b) case of regulators based on the switching
principle:
• boost threshold (not mandatory):
1.65 V/cell
• float threshold: 1.55 V/cell
• battery reconnect threshold:
1.45 V/cell
For lower back-up time, the values have to be
increased depending of the load requirement.
Consult the manufacturer.
For use in warm areas, a temperature
compensation on the charge voltage is not
recommended.
For use in cold areas, a temperature
compensation is recommended to increase
the charge acceptance.
Saft
Industrial Battery Group
12, rue Sadi Carnot
93170 Bagnolet - France
Tel: +33 1 49 93 19 18
Fax: +33 1 49 93 19 64
www.saftbatteries.com
Table A:
Rated
Capacity 5 h -
Cell type
C
h 1,00 V Ah
5
(Ah)
SUN+ 100
95
SUN+ 150
140
SUN+ 200
185
SUN+ 250
235
SUN+ 305
280
SUN+ 355
325
SUN+ 405
375
SUN+ 455
420
SUN+ 505
470
SUN+ 555
515
SUN+ 610
560
SUN+ 660
610
SUN+ 710
650
SUN+ 760
700
SUN+ 810
750
SUN+ 860
800
SUN+ 910
840
SUN+ 960
890
SUN+ 1015
940
SUN+ 1065
980
SUN+ 1115
1030
SUN+ 1170
1080
SUN+ 1215
1120
SUN+ 1270
1170
SUN+ 1320
1220
SUN+ 1370
1260
SUN+ 1420
1300
SUN+ 1470
1350
SUN+ 1520
1400
SUN+ 1570
1450
SUN+ 1620
1500
SUN+ 1670
1550
SUN+ 1720
1600
SUN+ 1775
1650
SUN+ 1830
1700
The recommended value is:
–3.0 mV/°C/cell (–1.68 mV/°F/cell)
starting from +20°C (+68°F).
6. Periodic Maintenance
In a correctly designed standby
application, Sunica.plus requires the
minimum of attention.
However, it is good practice with any system
to carry out an inspection of the system once
per year or at the recommended topping-up
interval period to ensure that the charging
system, the battery and the ancillary
electronics are all functioning correctly.
When this system service is carried out,
it is recommended that the following
actions should be taken:
• Keep the battery clean using only water.
Do not use a wire brush or solvents of
any kind. Vent plugs can be rinsed in
clean water if necessary.
• Check visually the electrolyte level.
Never let the level fall below the minimum
Doc N° 21885-2-1213
Data in this document is subject to change without
notice and becomes contractual only after written
confirmation.
Société par Actions Simplifiée
au capital de 31 944 000
RCS Bobigny B 383 703 873
Le Révérend Imprimeur - Printed in France - 1k
Nominal Capacity
Charging
120 h - 1.00 V
Current
C
Ah
0.1 C
A
120
5
(Ah)
(A)
100
9,5
150
14,0
200
19,0
250
24,0
305
28,0
355
33,0
405
38,0
455
42,0
505
47,0
555
52,0
610
56,0
660
61,0
710
65,0
760
70,0
810
75,0
860
80,0
910
84,0
960
89,0
1015
94,0
1065
98,0
1115
103
1170
108
1215
112
1270
117
1320
122
1370
126
1420
130
1470
135
1520
140
1570
145
1620
150
1670
155
1720
160
1775
165
1830
170
level mark. Use only distilled or deionized
water to top-up (see Table A for the
quantity of water per cell). Topping up of
the Sunica.Plus battery shall be carried
out when battery is fully charged.
Experience will tell the time interval
between topping-up.
Note There is no need to check the
electrolyte density periodically.
Interpretation of density measurements is
difficult and could be misleading.
• Check every two years that all
connectors are tight.
• The connectors and terminal bolts should
be corrosion-protected by coating with a
thin layer of anti-corrosion oil.
• High water consumption is usually caused
by improper voltage setting of the charger.
7. Environment
To protect the environment all used batteries
must be recycled. Contact your local Saft
representative for further information.
Max. quantity
Cell
of water
connection
to be added
bolt
in cc
per pole
280
M8
380
M10
500
M10
590
M10
700
M10
880
2xM10
1000
2xM10
1100
2xM10
1200
2xM10
1300
2xM10
1400
2xM10
1600
3xM10
1700
3xM10
1800
3xM10
1900
3xM10
2000
3xM10
2100
3xM10
2300
4xM10
2400
4xM10
2500
4xM10
2600
4xM10
2700
4xM10
2800
4xM10
3000
5xM10
3100
5xM10
3200
5xM10
3300
5xM10
3400
5xM10
3500
5xM10
3700
5xM10
3800
6xM10
3900
6xM10
4000
6xM10
4100
6xM10
4200
6xM10
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