Green hydrogen, stored at home
RCT HyESS-R — Residential hydrogen energy storage
A complete home energy solution.
One closed loop from the roof to the socket. Every part of the HyESS-R has its place in the house — and its job in the cycle.
- 1,600 kWhSeasonal storage
- 10 kWElectricity + heat
- Off-gridCapable, all year round
From summer sunlight to a winter evening
The HyESS-R closes the gap between when your roof produces energy and when your house needs it.
Capture excess energy.
Surplus solar power runs the electrolyser, producing hydrogen for long-term storage.
Power your home with clean energy.
Stored hydrogen is converted back to electricity and heat — when you need it most.
- 01CollectYour PV produces more than the house needs. An integrated battery takes the daily peaks.
- 02ConvertWhat the battery cannot absorb runs a PEM electrolyser, splitting water into hydrogen and oxygen.
- 03StoreThe hydrogen is compressed into cylinders at 20–30 MPa and holds its charge for months.
- 04ReturnWhen solar is short, the fuel cell turns it back into electricity and heat — emitting only water.
Electrolyser and fuel cell in one cabinet.
The indoor unit houses the PEM electrolyser and the fuel cell. Surplus solar power splits water into hydrogen at up to 3 kW — 0.5 Nm³/h at 99.999 % purity — and when the house needs power, the fuel cell returns up to 10 kW of electricity plus up to 10 kW of recoverable heat at up to 60 °C, cold-starting in under 60 seconds. System control and power management sit in the same cabinet, with an open interface to your battery and inverter.
Seasonal storage without losses.
The outdoor unit is the store: a compressor and cylinder packs of 16 × 50 L that hold hydrogen at 20–30 MPa. Modular from 320 to 1,600 kWh, it carries summer surplus into winter with no self-discharge, is non-flammable in its storage state, and is built for a service life of more than 20 years.
Why HyESS-R
A sunny day. A warmer winter.
Make more of the energy your home produces.
Seasonal Storage
Hydrogen holds summer surplus for months with no self-discharge — up to 1,600 kWh per system.
Power & Heat
The fuel cell returns up to 10 kW of electricity and up to 10 kW of usable heat at up to 60 °C.
100 % of Your PV
Nothing is curtailed: what the battery cannot take becomes hydrogen, so all of your solar energy is used.
Safe & Certified
TÜV SÜD certified and CE compliant. Non-flammable in storage, fully automated, cloud-monitored.
Get a quote for your home
Tell us a little about your home and your roof — we'll come back with a tailored HyESS-R proposal.