ThermaSol Solaris Sauna Cabin | Solar-Powered Outdoor Sauna

Solar panels on the roof and one external wall charge a connected battery pack with a single day of sunshine, enough for a full sauna session. Monitor power levels in real time through a mobile app so your cabin is always ready when you are. The Harvia KIP 3kW Wi-Fi sauna heater, controlled via the Harvia Xenio CX45 digital panel, delivers gentle, consistent heat and restorative steam entirely on solar power.

Contemporary Tile Oak cladding wraps both the exterior and interior, UV-resistant, modern, and distinctly European in character. A full-length solar-tinted glass door and an expansive solar-tinted window flood the cabin with natural light while maintaining complete daytime privacy. Inside, brushed alder benches and backrests offer a soft, warm surface for extended sessions. Integrated RGB LED color therapy lighting sets the mood from a fully customizable control. Arrives fully assembled and pre-wired for turnkey placement.

Key features

• Fully solar-powered, no power connection required, operates entirely off-grid
• Recognized by TIME as a Best Invention of 2025
• Solar panels on roof and external wall with connected battery pack
• One day of sunshine provides a full charge, monitor via mobile app
• Tile Oak cladding, UV-resistant, modern European aesthetic, interior and exterior
• Full-length solar-tinted glass door and expansive window for natural light and privacy
• Brushed alder sauna benches and backrests
• Harvia KIP 3kW Wi-Fi sauna heater included
• Harvia Xenio CX45 digital Wi-Fi control included
• Integrated RGB LED color light therapy with ambiance control
• Arrives fully assembled and pre-wired, turnkey placement
• Available in Small (2 to 3 persons) and Medium (4 to 5 persons)
• Ideal for gardens, patios, rooftops, and backyard spaces
• Designed and crafted in the U.S.A.
• 1-year warranty

Brand: ThermaSol
Model: SOLARIS SAUNA CABIN
Capacity (Small): 2 to 3 persons
Capacity (Medium): 4 to 5 persons
Dimensions (Small): 60"W x 86"D x 97"H (152.4 x 218.4 x 246.4 cm)
Dimensions (Medium): 86"W x 86"D x 97"H (218.4 x 218.4 x 246.4 cm)
Bench Depth: 24" (61 cm)
Construction: Tile Oak cladding
Bench Material: Brushed Alder
Sauna Heater: Harvia KIP 3kW with Wi-Fi
Sauna Control: Harvia Xenio CX45 with Wi-Fi
Lighting: RGB LED color light therapy
Weight (Small): 2,756 lbs (1,250.1 kg)
Shipping Weight (Small): 2,976 lbs (1,349.9 kg)
Weight (Medium): 3,064 lbs (1,389.8 kg)
Shipping Weight (Medium): 3,285 lbs (1,490.1 kg)
Origin: Designed and crafted in the U.S.A.
Warranty: 1-year limited

• ThermaSol Solaris sauna cabin, fully assembled and pre-wired
• Harvia KIP 3kW Wi-Fi sauna heater
• Harvia Xenio CX45 digital Wi-Fi control
• 1 box of Harvia AC3000 sauna stones
• Installation instructions
• 1-year warranty documentation

The Solaris arrives fully assembled and pre-wired for turnkey placement. A forklift or crane is required for positioning; manual offloading is not recommended at this weight. Install on a firm, level surface with slight drainage runoff; suitable surfaces include concrete, decking, pavers, or compacted gravel. A licensed electrician must install the heater, which is required to maintain warranty coverage. Please ensure all equipment and site conditions are ready at the time of delivery. For complete installation guidelines, refer to the included product manual.

Solaris Data Sheet

1-year limited warranty. Covers manufacturing defects in materials and workmanship under normal residential use. Does not cover damage from improper installation, misuse, neglect, unauthorized modifications, or failure to use a licensed electrician for heater installation. Contact support@marterraelements.com with your order number, photos, and a description of the issue. We aim to respond within 2 to 3 business days. Warranty is non-transferable and requires original proof of purchase.

Free shipping to the contiguous United States. The Solaris ships via flatbed trailer fully assembled, and we contact customers two weeks prior to delivery to allow time for site preparation. Please note that a forklift or crane is required for placement as manual offloading is not recommended at this weight. The path from the delivery point to the placement site must be clear and accessible for equipment before delivery day.

Returns are accepted within 30 days of delivery and require prior approval before anything is sent back. Please reach out to support@marterraelements.com to get the process started. Items must be unused, undamaged, and in their original condition. For additional details, please visit our Return & Refund page.