Mechanical Energy Storage. Reinvented.
Introducing the next generation of modular compressed-air energy storage: rugged HDPE AirSphere modules designed for long-life underground and underwater deployment.
- Simple
- Extremely safe
- Very long lifespan - no rust, no degradation
- Chemical free - no lithium or other rare-earth materials
- Truly 100% recycable and repairable - we buy them back!
Just air, pressure, and durable engineered structure.
Where to use
Rambex AirSphere modules are mainly designed for Rambex Microgrid - add more modules to add more free energy to your Off-grid house, farm, marina, seastead, industrial site, shop/cafe/studio or at home as back-up energy storage.
The modules are also suitable for your existing workshop compressed air system to increase energy storage for longer air tool usage, and save electricity with less compressor start-stop usage.
Safe Modular Architecture - Raft, Phontoon or Floor
Instead of one massive pressure vessel, AirSphere uses many independent storage modules.
Benefits include:
- localized fault isolation,
- easier transportation,
- scalable capacity,
- simplified maintenance,
- safer energy distribution.
Each module functions as a self-contained mechanical energy cell.
Rambex AirSphere modules can be placed into Rambex Raft system that can be used as a indoor/outdoor floor, sea phontoon and raft.
Rambex offer rectangular rafts/phontoons for 20 modules and hexagonal rafts of 19 modules.
Energy Storage Without Batteries
Rambex AirSphere stores surplus renewable energy mechanically:
- Solar or wind powers compressors
- Air is stored inside modular pressure spheres
- Stored pressure drives turbines or pneumatic generators when energy is needed
Simple. Mechanical. Durable.
Key Features
- Rambex AirSphere size: 70cm diameter
- Weight: 65kg
- 2x 3/4" BSP ports
- Pressure gauge and safety relief valve
- Regulator valve
- Drain valve and water collector
- Operational air pressure: 10 Bar
- Energy stored per sphere: 0.05kWh (50Wh)
- Modular: Expandable modular infrastructure
- Fully mechanical energy storage
- Material: HDPE
- Simple and repairable
- Secondary function as a floor/raft/phontoon
- Fully recycable
Designed for the Future
AirSphere is built around a different philosophy:
Energy storage should be:
- durable,
- maintainable,
- modular,
- and environmentally resilient.
A distributed mechanical energy network designed for long service life in demanding environments.
We Buy Back Used Rambex AirSphere Modules
Rambex AirSphere is designed around long-term reuse, repair, and material recovery.
When modules reach the end of their service life, customers can return them through the AirSphere Buy-Back Program.
Returned modules may be:
- refurbished,
- upgraded,
- repurposed,
- or fully recycled.
HDPE structural components can be recovered and reprocessed, reducing waste and supporting a circular energy infrastructure.
Benefits of the Buy-Back Program:
- reduced long-term ownership cost,
- responsible material recovery,
- simplified replacement process,
- upgrade pathways for newer generations,
- reduced environmental impact.
Mechanical energy storage should not become future landfill.
AirSphere is built to remain part of a long-term reusable energy ecosystem.
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