Hydrogen fuel cell systems
Grid-independent generation in scalable configurations from 150 kW past a megawatt, with hydrogen storage tanks alongside.
A vision in development
Horizon Power Grid Garden
150 kW – 1 MW+, community scale
A community microgrid that hides nothing and wastes nothing. Hydrogen fuel cells below ground power the neighborhood, while their only byproducts, heat and pure water, sustain a public greenhouse above.
Pure waterThe only exhaust
Year-roundPublic greenhouse
Grid-freeHomes, business, data
Making power beautiful
A power station the neighborhood gathers around.
Every fuel cell produces three things: electricity, heat and pure water. Conventional plants sell the first and vent the rest. The Power Grid Garden is designed to use all three, so power generation becomes a community asset, not a fenced-off liability.
Electricity
Grid-independent power for neighborhoods, businesses and data centers.
Heat
Vented. Raised into a greenhouse that grows all year.
Pure water
Vented. Piped up to water the gardens above the plant.
Five stages, one closed cycle
The loop.
This cycle is the product. Hydrogen becomes electricity, the byproducts become a garden, and the community feeds the cycle back to its start. Step through it, or let it run.
Hydrogen, produced on site
Reformers and electrolyzers generate hydrogen locally and bank it in storage tanks, ready whenever the community draws.
The platform
Proven hardware, new arrangement.
The Power Grid Garden is a vision in development. Its building blocks are not: every system below already runs in Renewable Innovations hardware in the field today, composed here at community scale.
EmPower inverters
The same power conversion and control layer that runs RI's EmPower stationary systems, sized for a neighborhood.
Backup batteries
Battery storage rides through load swings and backs the fuel cells, so the community never notices the transition.
Reformers and electrolyzers
On-site hydrogen production turns local power and water into fuel, keeping the loop closed inside the community.
The community ecosystem
The garden is the center. The grid reaches further.
Solar into the supply
Neighborhood rooftop solar feeds the community supply, adding daytime generation the microgrid can store or convert to hydrogen.
Fuel and charging in town
Hydrogen fueling and rapid EV charging at neighborhood retail: energy the community makes, sold where the community shops.
Conversion with on-site electrolysis
Local fleets convert to hydrogen with on-site electrolyzing stations, fueled by the same production that powers the grid.
Where it stands
In development, on tested ground.
We say it plainly: no Power Grid Garden is operating yet.
We are working with community developers to bring the first Greenhouse Grids from concept to ground-breaking. But RI hardware is already being tested as community infrastructure.
EPRI and the California Energy Commission selected RI-built hydrogen fuel cell trailer hardware for the Oakmont Village community microgrid pilot in Santa Rosa, California. The Power Grid Garden composes that same proven platform into something a neighborhood can walk through.
3,204
Homes in the Oakmont Village community
22
Grid outages there since 2019
“Imagine how happy citizens would be if this is what their power station looked like.”
At a glance
The outline.
A concept in development. Figures are the platform's planned range; each site is master-planned with the community.
Built for
- Neighborhoods
- Campuses
- Data-center districts
- Businesses
- Neighborhood retailFuel and charging
- Local fleetsOn-site electrolysis
| Configurations | 150 kW – 1 MW+, scalable |
|---|---|
| Exhaust | Pure water |
| Greenhouse | Year-round public greenhouse |
| Serves | Homes, business, data; grid-free |
| Components | Hydrogen fuel cell systems + storage tanks; EmPower inverters; backup batteries; reformers and electrolyzers |
| Status | Concept in development |
The building blocks, today.
Compare every systemPlant the first one.
If you're planning a neighborhood, campus or data-center district, tell us about the site. We'll bring the platform, the master plan and the greenhouse.