Most home batteries hang on a garage wall or sit on a slab beside the house. A new California company wants to hide the battery under your backyard deck and put the solar panels on the roof of a pavilion instead of your house.
Outer Spaces, based in El Segundo, announced on November 9, 2026 that it will show its OS1 system in person for the first time at RE+ 2026, held November 16 to 19 at the Las Vegas Convention Center. The company calls OS1 the world’s first solar pavilion and battery deck, a claim that is its own.
What OS1 is
According to Outer Spaces, OS1 combines open-air living space with solar generation and battery storage. Solar panels are built into the pavilion roof, so homeowners add generation without modifying or penetrating the main-house roof. Below the deck, low-profile lithium iron phosphate (LFP) battery modules called OS1 Horizon BladePack lie horizontally in dedicated bays, leaving the whole deck surface free for furniture, appliances and everyday use.
An integrated electrical wall holds the hybrid inverter, the OS1 DC Hub and the distribution equipment. Visitors to Booth W17153 can see the solar roof, the under-deck batteries and that electrical wall on a full-size unit.
Sizes and numbers
OS1 comes in two sizes. The 12 by 12 foot version carries approximately 2.5 kW of solar, and the 12 by 24 foot version approximately 5 kW. Each battery module holds 7.83 kWh, and systems scale from one to eight modules, for up to 62.64 kWh of storage.
The company rates output at up to 11.4 kVA and says OS1 can start large motor loads. That means it can back up the whole home during outages, including air conditioners and heat pumps, depending on configuration and connected loads. Those qualifiers matter: whether a specific home is fully covered will depend on the setup and what is plugged in.
Software and grid role
Owners manage the system through an app or web portal with three modes: Self-Power, Time of Use and Backup Standby. Outer Spaces also says OS1 is built to be ready for virtual power plant (VPP) participation where regional programs allow, which would let a home’s stored energy support the wider grid at peak times.
Design and installation
CEO and co-founder Jiake Liu framed the pitch around the battery. “We designed OS1 around the battery from day one, so the cooling, waterproofing, and wiring live inside the frame,” he said, adding that the system is modular and easy to assemble on site. The company says a licensed electrician completes the connection to the home, and that the architecture reduces installation complexity compared with conventional outdoor construction.
Business and timing
Outer Spaces launched in October with $8 million in pre-seed funding led by Upfront Ventures, with participation from Unlock Venture Partners, Mucker Capital and Genius Ventures. It was founded in 2025 by Jiake Liu, Terry Lin and Robin Liao, who also founded the outdoor living brand Outer. At RE+, the team plans to meet installers and builders to line up its first Southern California partners for 2027.
OS1 is due to be available starting in 2027 in Southern California and select markets nationwide, sold online and through installers, builders and developers. Pricing will be announced in early 2027, so cost compared with a standard rooftop array plus wall battery is unknown.
What it means
For homeowners, the idea is one structure that adds usable outdoor space, generation and backup power, without touching the roof. For builders and developers, a prefabricated, modular package could simplify adding solar and storage to new or existing properties. For utilities, another source of home batteries ready for VPP programs adds flexibility.
The open questions are practical ones: price, permitting for a structure that is both a pavilion and an electrical system, real-world backup performance, and how the product holds up outdoors over years. Those answers will come only after the 2027 rollout begins.
The bottom line
OS1 is an unusual take on home energy: make the backyard do the work. It is still a pre-launch product with no price, but its blend of design and power is a notable experiment in how households might add solar and storage.