A sustainable, circular and scalable system that converts electricity from any source into high-grade heat, and returns it as heat, steam, electricity or cooling. Exactly when you need it.
The storage gap has become the limiting factor in the energy transition.
Solar and wind capacity is growing rapidly. With it grows the need for large-scale storage to keep the energy system stable.
Heat dominates energy use in homes, buildings and industry. Yet almost all storage focuses on electricity alone.
High costs, scarce raw materials, degradation and fire risk make lithium unsuitable for long-duration storage.
Surplus and cheap electricity have little value at the moment of generation, and a lot of value a few hours later.
Daycell stores electricity as heat at up to 1,100°C and returns it in the form the user needs.
Reliable and flexible supply.
Sunlight converted into stored heat.
Clean, renewable electricity.
Excess energy put to good use.
Homes, buildings and heat networks.
Process steam up to 300°C.
Heat converted back into power.
Compact cooling as a by-product.
Thermal core•storage up to 1,100°C
One storage platform, four usable forms of energy.
Daycell is past the concept stage: built, tested and measured on real hardware.
Closed unit: insulated housing with integrated control cabinet.
Because Daycell stores energy as heat, the same platform serves very different energy needs.
Electricity, hot water and heating
Reliable and flexible energy supply
Process heat and steam up to 300°C
Reliable power and cooling
Grid stability and local energy networks
Storing surplus outside peak hours
From a single unit to multi-MWh installations: the same technology, simply repeated.
Above or below ground·modular·no specific soil conditions required
Daycell is designed to store energy reliably for decades, without wearing out.
Against the two most common alternatives for stationary storage.
| Lithium-ion | Molten salt | Daycell | |
|---|---|---|---|
| Lifespan | 8–15 years | 15–20 years | 30+ years |
| Cycle life | ~3,000–7,000 cycles | ~4,500 cycles | unlimited |
| Operating temperature | 15–35°C (cooling needed) | 270–350°C (heating needed) | up to 1,100°C, no conditioning |
| Safety | Fire risk, thermal runaway | Corrosive, complex sealing | Intrinsically thermally stable |
| Maintenance | Continuous BMS monitoring | High, active heating | Minimal, no moving parts |
| Materials | Critical raw materials needed | Widely available, waste streams | Widely available, recyclable |
| Scalability | Costs rise with scale | Limited to fixed sizes | 150 kWh to multi-MWh |
The fundamental technology risk has been resolved. What follows now is production and roll-out.
The technology behind Daycell is developed in-house and protected through an international patent strategy. Procedures are running in several jurisdictions, and patents are granted as the portfolio progresses.
Daycell is entering its next phase: commercial roll-out and industrial production. We are keen to talk to off-takers, energy companies, project developers, municipalities, grid operators and technology partners.
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