Homeowners in the United States are to be offered a backyard deck that holds up to 62.64 kWh of LFP battery storage beneath its floor. Outer Spaces, a US-based residential energy company, is to show the OS1 in person for the first time at RE+ 2026, and its sales are to begin in Southern California in 2027.
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Outer Spaces, a US-based residential energy company, is to show its OS1 system in person for the first time at RE+ 2026, which will be held at the Las Vegas Convention Center from 16 to 19 November. The OS1 is an open-air pavilion that generates electricity through solar panels in its roof and stores it in batteries beneath its deck.
The storage has been built into the floor of the deck. Low-profile OS1 Horizon BladePack modules, which use lithium iron phosphate (LFP) cells, lie flat in bays under the deck, and furniture can stand on the surface above them. One module holds 7.83 kWh, and up to eight can be fitted, for 62.64 kWh in all. A separate electrical wall carries the hybrid inverter, the OS1 DC Hub and the distribution equipment.
With a rated output of up to 11.4 kVA, the system is able to start large motor loads. It can therefore back up the whole home during an outage, including its air conditioners and heat pumps, although this depends on the configuration and on the loads that are connected. Owners are to control it from an app or a web portal. Where a regional program allows it, the system can also take part in a virtual power plant (VPP).
Most home batteries are bolted to a garage wall or sitting on a concrete pad beside the house. We built a new option that can generate and store energy, while also expanding livable space and improving the atmosphere of a home. We designed OS1 around the battery from day one, so the cooling, waterproofing, and wiring live inside the frame. It's modular and easy to assemble on-site. We have worked hard to get this right, and it's the part we most want RE+ attendees to view for a closer look.
Jiake Liu, Co-Founder and CEO of Outer Spaces
The company was launched in October with $8 million in pre-seed funding, in a round that was led by Upfront Ventures. At RE+, its team is to meet installers and builders in order to line up its first partners in Southern California, where the OS1 is to be sold from 2027.
A Brattle report for Pew has projected that the distributed storage enrolled in VPP programs could grow from 1 GW to 35 GW in the United States by 2050. Utilities have already begun to draw on such batteries, and DTE Energy has launched a residential battery VPP pilot with sonnen in Michigan, which is to link nearly 100 homes in Ann Arbor.