The document compares different HydroSave battery models for various applications. The HydroSave 4 is suitable for light operations with moderate depth of discharge up to 60%. The HydroSave 8 is for normal operations with 80% depth of discharge and moderate currents. The HydroSave 13 can handle heavy operations with high currents, 80% depth of discharge and opportunity charges. It also has the longest intervals between water top-ups at 13 weeks compared to 8 weeks for the HydroSave 8 and 4 weeks for the HydroSave 4.

2. HydroSave Components HydroSave 4 HydroSave 8 HydroSave 13
BATTERY Special Design
CHARGER 50 Hz HF HF + Air Lift
ELECTROLYTE LEVEL INDICATOR
AQUA FILLING optional optional optional
AIR LIFT – –
Light operation with
moderate DoD
(up to 60%)
Normal operation with
80% DoD and moderate
currents
Heavy operation with 80%
DoD, high currents and/or
opportunity charges
Normal Temperature
about 30o
C
Normal Temperature
about 30o
C
High Temperature
Shifts
Utilization
Temperature
Low Duty Normal Duty Heavy Duty
Single Shift Single Shift Multi Shift

3. Why SUNLIGHT HydroSave Series?
Capacities exceed
nominal values of
international standards
High performance,
reliability and long
service life
High energy density
Robust and
durable construction
Lower Total Cost of Ownership
compared to conventional systems
Equivalent design life and performance
compared to conventional DIN design
motive power batteries
Reduced maintenance costs:
8 weeks water topping-up interval that
can be extended up to 13 weeks
with the use of airlift system
Increased operational safety, due to the
electrolyte level indicator in standard system
Low maintenance
requirements
High quality raw
materials and
components
Complete Product
& Services Offering
Recyclable
Flexibility and fast product delivery,
due to production customization
capabilities
Tested and reliable solution
Peace-of-mind, through
SUNLIGHT Global Partners
Network
Conditions:
The topping up intervals are based on 80%DoD
- 5 cycles per week
The following charging factors are considered:
• 1.2 for the conventional (50 Hz) charger
• 1.10 to 1.12 for the Sunlight HF pulse charger
• 1.07 for the Sunlight HF charger using the Air
Lift system

4. Comparison parameters Typical System HydroSave 4 HydroSave 8 HydroSave 13
WATERING INTERVAL 2 weeks 4 weeks 8 weeks 13 weeks
CHARGER 50 Hz 50 Hz HF HF + Air Lift
CHARGING FACTOR 1.2 1.2 1.11 1.07
ELECTROLYTE LEVEL INDICATOR –
AQUA FILLING optional optional optional optional
AIR LIFT – – –

5. Plate Type
Type
Designation
Nominal
Capacity
Ah (C5)
Max. cell dimensions (mm)*
Weight
(kg) ***
Length Width Height **
0-2 mm 0-2 mm 0-2 mm
125 Ah
2 HydroSave PzS 250 250 47 198 595 15.0
3 HydroSave PzS 375 375 65 198 595 21.2
4 HydroSave PzS 500 500 83 198 595 27.4
5 HydroSave PzS 625 625 101 198 595 33.9
6 HydroSave PzS 750 750 119 198 595 40.3
7 HydroSave PzS 875 875 137 198 595 46.5
8 HydroSave PzS 1000 1000 155 198 595 53.1
9 HydroSave PzS 1125 1125 174 198 595 59.4
10 HydroSave PzS 1250 1250 192 198 595 66.0
155 Ah
2 HydroSave PzS 310 310 47 198 740 18.9
3 HydroSave PzS 465 465 65 198 740 26.7
4 HydroSave PzS 620 620 83 198 740 34.6
5 HydroSave PzS 775 775 101 198 740 42.6
6 HydroSave PzS 930 930 119 198 740 50.5
7 HydroSave PzS 1085 1085 137 198 740 58.5
8 HydroSave PzS 1240 1240 155 198 740 66.4
9 HydroSave PzS 1395 1395 174 198 740 74.4
10 HydroSave PzS 1550 1550 192 198 740 82.4
* According to DIN/EN 60254-2 and IEC 60254-2
** Including connector bolt
*** Filled and charged cell weights ±5%