Reserve Power Batteries


Advanced Low Maintenance Tubular Plate Batteries for Renewable Energy Storage

RES SOPzS is an advanced cost efficient solution ideal for energy storage for residential solar installations as well as telecom or other infrastructure systems that demand long cycle life and increased watering intervals.

Enhanced tubular plate technology specially designed for renewable energy applications and SUNLIGHT’s solid experience on industrial batteries produce an exceptional combination of benefits in a single battery.

The products are developed by SUNLIGHT’s R&D team which constantly designs and evaluates new innovative solutions to better meet market needs based on the latest technological trends, industry developments and market feedback.

SUNLIGHT’s products and services have gained international recognition by ensuring uninterrupted and reliable operations in a wide range of critical applications for a broad spectrum of industries, such as Telecom and Power networks.




Long cycle life
Tubular positive plates and special low-antimony lead alloy composition provide unique advantages in prolonging cycling operation to a 60% DoD cycle life of 2000 cycles at 20°C.

Performance and reliability
Optimum design, exclusive use of high quality materials, robust construction and state of the art European manufacturing facilities ensure high capacity performance, efficiency and reliability.

Minimum maintenance
Low maintenance design with reduced topping up needs. Transparent container for easy visual electrolyte level monitoring.and cumulative experience on advanced submarine battery manufacturing, ensure reliability in applications demanding high performance.

Easy maintenance
Increased electrolyte volume in large translucent containers and special low antimony alloys ensure rare and easy on site visits for topping up.

Operational safety
Extensive compliance testing performed under European and Global norms verified by independent 3rd party certification agencies.

Complete & flexible energy storage solution
Fast delivery of modular battery systems with all the necessary accessories for safe installation in trays.

Optimum Total Cost of Ownership (TCO)
Significant benefits in terms of cost per cycle and lifetime value maximization.

Positive Plates

  • Tubular plate design
  • Special low antimony lead alloy
  • Red Lead in-house production by 99,9% Pure Lead
  • Dry Filling process

Negative Plates

  • Paste mixture ensures high adherence and cohesion
  • Pasted negative plates of grid design
  • Optimized low antimony lead alloy
  • Robust construction
  • Long life expander


  • High porosity grade material
  • Allow migration of ions during charge/discharge
  • More acid in the surrounding area of the plates


  • Highly microporous material
  • Fine pore structure
  • Low electrical resistance

Bottom Bar
Ultrasonic welding

High purity sulphuric acid with nominal density of 1.24 +/- 0,01 kg/l (20°C)

Container / Lid

  • Large volume container
  • High impact resistant, translucent Polypropylene for the container
  • Lid welding, trimming and tightness control

Vent Plug
Electrolyte basket level marking, specially designed lid, anti-surge baffle

Pole Terminal
Advanced design of pole post and its sealing to the lid. Rubber ring with optimized hardness and acid resistance

Pole Bridge
Terminal bridge manufactured with Cast On Strap process

Residential Installations
Off-grid or smart grid connected power systems electrifying houses, hotels, hospitals, schools or factories

Infrastructure PV systems
Remote telecom stations, water pumping, oil & gas distribution, traffic signaling, road lighting, telemetry, security systems



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SPA Batteries