$104.55. Originally $159.00, You Save 34%. The Eccotemp L5 Portable Tankless Water Heater! You get instant, endless hot water! The Eccotemp L5 portable tankless water heater is perfect for campsites, cabins, or simply around the house. Wash your car, boat, take a hot shower, wash the dogs or horse. You can add the Eccotemp L5 portable water heater to a pressure washer! The ignition is with 2 "D" cell batteries great for off grid or other areas where electricity is not readily available.