OPzS · Series ROS

ROS Series – OPzS (Flooded)

The energy tank. 20+ years of proven service life.

The ROS Series is the true 'energy tank' of our portfolio, utilizing traditional vented tubular plate technology (OPzS) with liquid electrolyte. Classified under the EUROBAT 'Very Long Life' category, it is engineered for extreme durability, offering a proven design life of over 20 years. Complying with DIN 40736-1 standards, its transparent SAN container allows for easy visual inspection, making it the premier choice for large-scale solar, railway infrastructure, and power plants where reliability is non-negotiable.

Request a quote Models (20) PDF
ROS Series – OPzS (Flooded)
Models
20
Nominal Voltage
2 V, 6 V, 12 V
Capacity
50–3300 Ah
Design life
20 years
Warranty
2 years
EUROBAT
>12 Years (Very Long Life)

Key features

  • Technology: Vented tubular plates with liquid electrolyte
  • Maintenance: Periodic topping up with distilled water required
  • Durability: Over 20 years proven design life at 20ºC
  • Control: Transparent container for easy electrolyte level monitoring

Applications

  • Solar/Wind Energy Systems
    Energy storage for deep-cycle photovoltaic and wind systems, ensuring stable power supply even during low generation periods.
  • Electrical Substations
    Backup systems for control, switching, and protection equipment in high and medium voltage electrical substations.
  • Telecommunications and Base Stations
    Critical backup for network infrastructures and mobile base stations in remote locations with extreme weather conditions.
  • Railway Signaling and Infrastructure
    Uninterruptible power supply systems for traffic control, signaling, and safety in tunnels and railway infrastructures.
  • Maritime
    Reliable power supply for buoys, lighthouses, and maritime navigation systems requiring long periods of maintenance-free autonomy.
  • UPS and Data Centers

Standards and certifications

CE CERTIFIED ISO 9001 / 14001 IEC 60896-21/22 YD/T1360 BS6290 part 4 DIN40742

ROS series models

Each model links to its datasheet with discharge tables, dimensions and charge parameters. Rated capacity at 25 °C; C20 = 20-hour rate.

Model Nominal Voltage Capacity Length (mm) Width (mm) Height (mm) Weight (kgs)Terminal
ROS2-100 (formerly RKS2-100) 2 V 100 Ah (C10) 103 206 354 8.5F10
ROS2-150 (formerly RKS2-150) 2 V 150 Ah (C10) 103 206 354 10.5F10
ROS2-200 (formerly RKS2-200) 2 V 200 Ah (C10) 103 206 354 13IT-M8-CU-20-7
ROS2-300 (formerly RKS2-300) 2 V 300 Ah (C10) 145 206 354 17.5F10
ROS2-350 (formerly RKS2-350) 2 V 350 Ah (C10) 124 206 470 20F10
ROS2-420 (formerly RKS2-420) 2 V 420 Ah (C10) 145 206 470 24.5M8
ROS2-500 (formerly RKS2-500) 2 V 500 Ah (C10) 166 206 470 26F10
ROS2-600 (formerly RKS2-600) 2 V 600 Ah (C10) 145 206 645 31F10
ROS2-800 (formerly RKS2-800) 2 V 800 Ah (C10) 191 210 645 44F10
ROS2-1200 (formerly RKS2-1200) 2 V 1200 Ah (C10) 275 210 645 61.5F10
ROS2-1500 (formerly RKS2-1500) 2 V 1500 Ah (C10) 275 210 795 75M8
ROS2-2000 (formerly RKS2-2000) 2 V 2000 Ah (C10) 399 210 771 108M8
ROS2-3000 (formerly RKS2-3000) 2 V 3000 Ah (C10) 576 212 771 157F10
ROS2-3300 (formerly RKS2-3300) 2 V 3300 Ah (C10) 576 212 771 162F10
ROS6-150 6 V 150 Ah (C10) 270 205 390 42IT-M8-CU-20-7
ROS6-260 (formerly RKS6-260) 6 V 260 Ah (C20) 260 280 248 22F10
ROS12-50 (formerly RKS12-50) 12 V 50 Ah (C10) 260 168 211 20F11
ROS12-100 (formerly RKS12-100) 12 V 100 Ah (C10) 409 176 225 42.5F10
ROS12-150 (formerly RKS12-150) 12 V 150 Ah (C10) 522 238 218 52.5F10
ROS12-220 (formerly RKS12-220) 12 V 220 Ah (C10) 522 269 220 73.5F12

Construction

ComponentMaterial
ContainerSAN
CoverABS (Flame Retardant Optional)
ElectrolyteSulphuric acid
NegativeLead
PositiveLead dioxide
Safety ValveRubber
SealantEpoxy Resin
SeparatorFibre Glass
TerminalCopper

Performance graphics

CHARGE CHARACTERISTICS

CHARGE CHARACTERISTICS

DISCHARGE CHARACTERISTIC 25oC

DISCHARGE CHARACTERISTIC 25oC

SELF DISCHARGE CHARACTERISTICS

SELF DISCHARGE CHARACTERISTICS

FLOAT VOLTAGE VS FLOAT LIFE

FLOAT VOLTAGE VS FLOAT LIFE

CYCLE DISCHARGE VOLTAGE CURVE (Test standard BS EN 61427:2005)

CYCLE DISCHARGE VOLTAGE CURVE (Test standard BS EN 61427:2005)

Downloads

ROS series datasheets (PDF) Product Catalog Warranty CE Declaration of Conformity Use and maintenance guide

Ready to Power Your Project?

Our team of experts is ready to help you find or design the perfect energy solution. Contact us for a personalized consultation.

Contact Our Experts