About SunSide

At SunSide™, we believe the best solutions are simple, effective, and sustainable.

Born from decades of experience in thermal engineering and renewable energy, SunSide™ is the world’s first plug-and-play solar heating system designed specifically for spas.

Our journey started with a question: How can we make spas — one of the most popular and rewarding home luxuries — more energy-efficient and sustainable? Spas are beloved for their relaxation, therapeutic benefits, and social enjoyment, but keeping water hot year-round consumes a significant amount of electricity. With rising utility costs and growing concerns about energy use, we saw a clear opportunity to help spa owners lower their bills and reduce environmental impact — without sacrificing comfort or performance.

So we set out to create something entirely new.

SunSide™ combines high-efficiency solar thermal collection, a durable heat exchanger, and an ultra-compact, self-contained design that integrates seamlessly with virtually any existing spa. It installs in under an hour, requires no plumbing modifications, and can cut spa heating costs by 50–75%, delivering a payback period as short as one to two years in many regions.

But we didn’t stop at the technical solution. We built SunSide™ to work for everyone in the spa ecosystem:
•  Homeowners, who want to enjoy their spa while saving money and reducing their carbon footprint.
•  Dealers, who want an easy-to-sell, easy-to-install add-on product with great margins and customer appeal.
•  Utilities, who benefit from reduced grid demand and improved load management in peak periods.
• The planet, which gains when we cut electricity use and move toward more sustainable lifestyles.

SunSide™ is proudly developed and tested in the USA, with field trials planned in California and Colorado. As we prepare for broader rollout, we’re working closely with leading spa dealers, utilities, and industry veterans to ensure SunSide™ delivers on its promise of effortless energy savings.

Thank you for joining us on this journey to make spas smarter, greener, and more affordable.

— The SunSide™ Team