Why is a power bank not suitable as an essential power source for road trip living?

To eliminate the worry and anxiety of power consumption during road trips, on-road electrical equipment must meet the following basic requirements:

First, to power the refrigerator and daily cooking, the secondary battery must have a capacity of at least 2 kWh, meaning a battery with at least 200 Ah is required.

Second, to maintain this power, you also need fast charging equipment. Therefore, a motorhome or RV must have fast on-road charging, as well as solar power, mains power, and a portable generator. Using the vehicle's own generator to controllable current limiting for safe, reliable, and sustainable on-road charging is essential. To be meaningful and practical, a charging capacity of at least 2 kWh must be achieved within 2-3 hours of driving. This requires a 40A or higher on-road charger. Solar power and mains power can also be added for backup. Therefore, realistically speaking, the vast majority of mobile power banks currently on the market fail to meet these basic requirements in terms of capacity and charging speed. The few that do meet these requirements cost over 10,000 yuan. For this reason, the on-board chargers I developed start at 40A. Currently, the 40A, 57A, and 75A models are finalized for mass production and marketing, with continuous charging rates of 0.6, 0.8, and 1.0 kWh per hour.

Third, the power supply equipment must be portable and easily removable. Portability means it must be lightweight enough for individual users, making it easy to transport for quick mains charging. At the end of a journey, it can be quickly disassembled, returning the vehicle to commuter use. In extremely cold regions, the auxiliary battery can be moved indoors for protection. Therefore, the auxiliary battery must weigh less than 30 kg. Based on the volume-to-weight ratio of lithium iron phosphate batteries, its capacity should be around 300 Ah. Convenience means that the wiring harness connections cannot use threaded terminals. Our products all adhere to a unified standard and utilize a 120A ANEN plug structure for plug-and-play operation.

Fourth, the storage location within the vehicle must be safe and secure, which requires the auxiliary battery to be small. From a vehicle safety structural design perspective, placing the auxiliary battery under the driver's seat is the safest location to prevent secondary injuries in the event of an accident.

Fifth, regarding electrical safety, the current national standard for household appliances limits the power consumption of most appliances to 2200W (most plug-in hybrids are limited to 2200W). (The power supply is limited to 220V/10A.) Electrical appliances used in the vehicle cannot exceed the upper limit of 2200W. Converted to the standard automotive DC voltage of 12V, the maximum current consumption cannot exceed 2200W/12∨ = 185 amperes. In other words, the auxiliary battery's continuous output power capacity cannot be less than 2200W. Our 220V household appliances can all be used normally in the vehicle, allowing for the use of high-power flameless stoves for boiling water and cooking. Therefore, the auxiliary battery's discharge current must be above 200A, and the auxiliary battery cell must be 200Ah or higher, with a discharge performance rating of 1C or higher. This is something that 99.99% of current power banks cannot achieve. The auxiliary batteries we currently produce are all 200Ah or higher, with a continuous output power of 2000W or higher.

Sixth, the product is reusable and expandable. The capacity of auxiliary appliances can be increased, allowing the original product to be used again. This requires no specialized labor and is simple and quick for the car owner to operate. Because my three-piece on-road power supply product series—a charging station, a lithium iron phosphate secondary battery, and an inverter—uses a unified interface standard and offers optimal cost-effectiveness, it significantly reduces the labor required for assembly, making this requirement easily achievable.

In summary, the vast majority of mobile power supplies on the market currently lack a single product that fully meets the six basic requirements for daily road trips. My design and development philosophy has always been simplicity, as only simplicity can lead to low prices and market opportunities. For road trips, I also advocate lightness, as only light travel allows for speed. The purpose of travel is to relax, so why bother carrying heavy loads? Please share your thoughts.