Heating time depends on several factors: initial water temperature, outdoor temperature, ground type (concrete, grass, etc.), wind, solar power, etc. To encourage increased temperature, expose the shower to the sun between midday and 6 p.m. The temperature drops as soon as the sun fades. You can add hot water directly. Be careful that the temperature doesn't go above 122°F as this could damage the components or put you in danger | Quechua, 10 L Solar Camping Shower in Base Color
