Thermasol Solaris Solar-Powered Outdoor Sauna – Tile Oak, 2–5 Person, Off-Grid, Panoramic Glass Wall, Pre-Assembled, Designed in Finland

The Thermasol Solaris is the world’s first fully off-grid, solar-powered electric sauna available in the U.S. — a landmark achievement in sustainable outdoor living designed and crafted in Finland. Available in Small (2–3 person) and Medium (4–5 person), the Solaris operates without any external power connection using integrated solar panels, battery packs, and a pre-installed 3kW KIP WiFi-enabled heater. A solar-tinted panoramic glass wall floods the interior with natural light while maintaining privacy. Tile Oak interior and exterior cladding delivers a modern, durable, UV-resistant finish that’s easy to maintain. Delivered pre-assembled for rapid setup. For those who want a premium outdoor sauna anywhere — lakeside, off-grid, or on a property with no convenient power hookup — nothing competes with the Solaris.

• World’s first solar-powered off-grid electric sauna in the U.S. — fully self-sufficient operation powered by integrated solar panels and battery packs with zero dependency on grid electricity.
• Two size options — Small (2–3 person, 86"×60"×97") or Medium (4–5 person, 86"×86"×97"); both powered by a 3kW KIP WiFi heater for efficient, gentle steam heat.
• Solar-tinted panoramic glass wall — large glass panel invites natural light into the cabin while the solar tint preserves interior privacy from the outside.
• Tile Oak interior & exterior cladding — modern European tile-style finish across both interior surfaces and exterior cladding; UV-resistant, weather-durable, and easy to clean — no traditional wood maintenance required.
• Brushed alder benches — smooth, refined seating surface with a contemporary aesthetic suited to the Solaris’ design language.
• 3kW KIP heater with WiFi — compact, efficient heater delivers fast, gentle steam with WiFi connectivity for remote scheduling and control.
• Xenio CX170 integrated control panel — all LED lighting and heater controls are unified in a single panel for a seamless, intuitive experience.
• Harvia Delta 3.6kW backup/steam heater — ensures consistent, reliable heat with fast warm-up and gentle steam delivery.
• Glass door (standard) — lockable glass entry maintains the clean, modern aesthetic of the Solaris exterior.
• Pre-assembled delivery — arrives ready to install with minimal on-site assembly, enabling faster setup compared to kit-style sauna buildings.
• Designed and crafted in Finland — built to authentic Nordic sauna standards with premium craftsmanship and materials sourced from one of the world’s leading sauna-building traditions.
• Low-energy model option — solar panels + battery pack configuration reduces power consumption, enabling true off-grid independence.

Who it’s for: Homeowners, property developers, and outdoor living enthusiasts who want the ultimate sustainable outdoor sauna — off-grid capable, architecturally distinctive, and built to the highest Finnish craftsmanship standards — for primary residences, vacation properties, or remote locations with no grid power access.

Size Options

Frequently Asked Questions

Does it truly require no external power connection?
Yes — the Solaris is designed for fully off-grid operation using integrated solar panels and battery packs. It can be placed in remote locations, lakeside retreats, or properties with no convenient power hookup and operate independently.

Is it delivered pre-assembled?
Yes — the Solaris is delivered pre-assembled, significantly reducing installation time compared to traditional sauna kit buildings.

What makes the Tile Oak finish different from wood?
The Tile Oak cladding offers a modern, tile-textured aesthetic on both interior and exterior surfaces with UV resistance and weather durability that traditional wood sauna cladding requires more maintenance to match.

How does it compare to the Thermasol Vera?
The Vera is a compact 2–3 person mirrored glass sauna designed for tight urban spaces (patios, balconies, rooftops). The Solaris is a larger, solar-powered off-grid sauna available in 2–3 or 4–5 person sizes with tile exterior cladding, a panoramic glass wall, and full grid-independence — ideal for larger properties, vacation retreats, and off-grid use cases.

Specifications