Jingmen Solar-Powered Mobile Toilet
The Jingmen solar-powered mobile toilet achieves stable operation in off-grid environments through a self-contained energy system and efficient wastewater disposal technology, featuring intelligent energy management and strict site selection requirements.
Energy System: Photovoltaic-Storage-Power Integration
The solar-powered mobile toilet employs an energy conversion chain consisting of “photovoltaic panels + controller + deep-cycle battery.” Photovoltaic panels convert sunlight into direct current, which is regulated by the controller and split into two paths: one directly powers low-energy devices (such as LED lights) to minimize energy loss; the other is stored in the battery, creating a “generate-use-store” cycle. For example, in Jingmen, where the average annual sunshine is approximately 1,500 hours, the battery capacity is configured to be 1.3 times that of conventional areas to cope with consecutive rainy days.
Wastewater Disposal System: Combining Water Conservation with Low Energy Consumption
Limited by the photovoltaic panel area, the wastewater disposal system utilizes two mainstream technologies:
- Micro-flush technology: Each flush requires only 0.3 to 0.5 liters of water, with water pressure provided by pre-stored compressed air or gravitational drop, significantly reducing water consumption.
- Vacuum negative pressure technology: Excrement is drawn into a collection tank through air pressure differentials in the pipes, consuming less electricity but requiring higher sealing standards, necessitating regular inspection of pipe connections.
Intelligent Management: Dynamic Adjustment and Fault Warning
The toilet is equipped with an intelligent control module that continuously monitors battery voltage, photovoltaic panel current, and water tank levels. When the battery voltage drops below 11.8 volts, the system automatically cuts off non-essential loads (such as high-speed fan modes), retaining only lighting and flushing functions to ensure over 72 hours of basic operation. Additionally, the module records equipment operation data, assisting lessors in quickly locating faults and reducing maintenance time.
Site Selection Criteria: Dual Constraints of Light Conditions and Physical Space
Installation must meet the following conditions:
- Orientation requirement: Photovoltaic panels must face south or southwest to maximize solar radiation reception.
- Shading avoidance: No tall buildings, trees, or billboards should be within 5 meters to prevent shadows from covering the photovoltaic panels.
- Irradiance measurement: A portable sunshine recorder is used to measure the site’s instantaneous irradiance; if it falls below 400 watts per square meter, the toilet’s orientation must be adjusted or flexible photovoltaic panels added for supplementary energy.
The Jingmen solar-powered mobile toilet provides a sustainable sanitation solution in areas without grid coverage, suitable for temporary or remote settings such as tourist attractions and construction sites.
