5
Case 2:
With no external source available for recharging.
Connect the battery to the solar panel regulator and leave at rest for
1 to 2 weeks.
For this charge, set the regulator to the following values:
TºC
Voltage
Low charge-
restart voltage
0 to 20ºC
2.30V
20 to 40ºC
2.30V
High charge-
disconnect voltage
0 to 20ºC
2.50V
20 to 40ºC
2.45V
End-of-charge
End-of-charge is when all cell voltages and electrolyte specific
gravities (corrected to 25°C) cease to rise for three consecutive
hourly readings.
Continue charging until the specific gravity of electrolyte for all cells
rise to nominal specific gravity at maximum level.
Cell voltages:
Charging rate
(C=Capacity)
Minimum voltage in volts per cell for:
15ºC
25ºC
35ºC
45ºC
C/20
2.75 V
2.70 V
2.65 V
2.60 V
C/30
2.70 V
2.65 V
2.60 V
2.55 V
C/45
2.67 V
2.62 V
2.57 V
2.52 V
C/60
2.64 V
2.59 V
2.54 V
2.49 V
Electrolyte specific gravities:
• Measure the specific gravity with a hydrometer
• After reading, squirt the solution back into the cell from which it
was drawn
• The nominal specific gravity at the end of the charge at the
specified level is for a temperature of 25ºC
• If temperature is above or below 25ºC, specific gravity reading
must be adjusted using the table hereunder.
Specific gravity
15ºC
20ºC
25ºC
35ºC
45ºC
1.147
1.144
1.142
1.138
1.131
1.167
1.164
1.162
1.157
1.149
1.186
1.183
1.180
1.176
1.168
1.206
1.203
1.200
1.194
1.187
1.217
1.213
1.210
1.204
1.197
1.227
1.223
1.220
1.214
1.207
1.237
1.233
1.230
1.224
1.216
1.244
1.240
1.237
1.231
1.223
1.248
1.244
1.241
1.234
1.226
1.254
1.250
1.247
1.240
1.232
1.259
1.255
1.252
1.245
1.236
1.270
1.266
1.263
1.256
1.247
Nominal electrolyte specific gravity of PowerSafe
®
TS cells at
maximum level = 1.240 at 25°C
Values according to electrolyte level at 25°C:
Type
Minimum
Medium
Maximum
TLS, TVS &
TYS
1.280
1.260
1.240
TZS
1.265
1.250
1.240
2.5. Disposal
Lead acid PowerSafe TS batteries are recyclable. End of life
batteries must be packaged and transported according to prevailing
transportation rules and regulations. End of life batteries must be
disposed of in compliance with local and national laws by a licensed
battery recycler.
3. Cyclic Operation
3.1. Cyclic Performance
The graph below shows cycling capability of Powersafe
®
TS
products (25°C):
End-voltage as a Function of Charge Rate and Temperature
C120 charge rate
Vo
lt
a
g
e
25ºC
45ºC
35ºC
2.75
2.27
2.65
2.60
2.55
2.50
2.45
0.000 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045 0.050
Number of Cycles vs Depth of Discharge
PowerSafe TS
®
in Renewable Energy Applications
Number of Cycles vs Depth of Discharge
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
5500
6000
6500
7000
7500
8000
8500
9000
9500
10000
10500
11000
11500
12000
12500
13000
10
20
30
40
50
60
70
80
Depth of Discharge % @ 25°C
N
um
be
r
of
C
y
c
le
s
