The Hugo X-1 is a battery backup system — also known as an Uninterrupted Power Supply (UPS) — for tankless water heater products and more. Designed specifically to run your Rinnai tankless unit without power for multiple days, The Hugo X-1 will also keep your computer or cellphone powered until power is restored. The Hugo X-1 is available now for order from your local Rinnai Ace Dealer.