I. Overall Appearance and Portability

　　1. Main Unit Form and Build

　　Body Design: It features a compact rectangular structure, measuring approximately 230 x 160 x 180 mm and weighing ≤5 kg. It features an integrated non-slip handle on the top (150 mm grip distance, 30 mm thickness), making it easy to carry with one hand, perfect for camping and portability. The housing is made of flame-retardant ABS material (meets 94-V0 standards) with a frosted finish that resists fingerprints and scratches, leaving no visible marks after outdoor impacts.

　　User Interface: The front integrates a high-definition digital display and physical buttons. The screen displays the remaining battery (with 1% accuracy), output power, charging status, and remaining battery life in real time. The button area is divided into "Master Control - AC Output - DC Output - Illumination" zones, allowing for clear operation at night without the need for additional lighting. 2. Portable Solar Panel Design

　　Folding Storage: The included 100W monocrystalline silicon solar panel features a three-stage folding structure. When folded, it measures 280x400x50mm and weighs ≤2.5kg. The edges are lined with durable Oxford cloth, allowing it to fit directly into the side pocket of a camping backpack. The panel is equipped with magnetic fasteners for automatic positioning upon unfolding, preventing loosening or shifting.

　　Mounting Compatibility: The back of the solar panel includes an adjustable bracket (steplessly adjustable from 0-60°) that can be attached to the ground, a tent roof, or a car roof. The non-slip pad on the bottom of the bracket provides a secure fit and prevents tipping in wind speeds ≤ Level 5. The 5-meter weather-resistant cable allows for storage away from a tent in direct sunlight. II. Core Performance and CPAP Compatibility

　　1. Power Stability Details

　　Output Characteristics: The AC output is a pure sine wave (220V/50Hz), with a continuous power of 500W and a peak power of 1000W, fully compatible with mainstream CPAP devices (typically 30-80W). When connected to a CPAP, the digital display shows instantaneous power fluctuations of ≤2W, with no electrical noise or abnormal device operation.

　　Battery Life: The built-in 500Wh lithium iron phosphate battery (124800mAh) provides 15-16 hours of continuous power in CPAP low-power mode (30W). With the heating and humidification function enabled (80W), the battery life reaches 6-7 hours, sufficient for a full night's sleep. The screen displays the remaining battery life in real time, with an accuracy of ≤10 minutes. Low-Noise Operation: Operating noise is ≤40dB when powered on. Even with the added noise of the CPAP device itself, it's still quieter than the background noise in a camping environment, ensuring no noticeable interference during nighttime use. Only a faint fan noise can be heard at a distance of 10cm from the device.

　　2. Solar Charging Efficiency Demonstration

　　Fast Charging: In bright sunlight (sunlight intensity ≥800W/m²), a 100W solar panel maintains a stable charging power of 90-95W, charging from 20% to full in just 5-6 hours. In cloudy weather, the power remains at 40-60W, extending the charging time to 8-10 hours, meeting daytime charging needs.

　　Intelligent Adaptability: Equipped with an MPPT solar charge controller that automatically tracks the maximum power point, this controller achieves a 20-30% improvement in charging efficiency compared to conventional PWM controllers. Even with sudden changes in light intensity, the charging current adjusts smoothly, ensuring no noticeable surges. Battery voltage fluctuations are ≤0.5V. Connection Convenience: The solar panel and the main unit utilize a quick-plug DC connector with moderate insertion and removal force (5-8N). The connector is equipped with a waterproof and dustproof cover that fits snugly once closed, eliminating the risk of leakage from rain, making it suitable for harsh outdoor environments.

　　3. Safety Details

　　Battery Protection System: The built-in intelligent BMS battery management system provides six levels of protection, including overcharge, over-discharge, short circuit, overcurrent, and overtemperature. If the CPAP device accidentally short-circuits, the power supply automatically shuts off within 0.1 seconds, and a fault message pops up on the digital display. Resolving the problem and restarting the device allows for resumption of use.

　　Adaptability to Extreme Environments: The operating temperature range covers -20°C to 45°C. The battery capacity retention rate is ≥85% in low-temperature environments, and the surface temperature is ≤55°C in high-temperature exposure. The internal battery cells dissipate heat naturally through the heat dissipation holes, preventing overheating protection from being triggered. III. Multi-Scenario Camping Performance

　　1. Core Scenario: Nighttime CPAP Power Supply

　　Simplified Operation: Upon arriving at camp in the evening, place the power supply in a corner of the tent and connect the CPAP device via a 1.5-meter AC extension cord. Press the main control and AC output buttons to activate the power supply. The digital display monitors the remaining battery level in real time. If fully charged via the solar panel during the day, the device can be used for two consecutive nights without recharging.

　　Assistive Functions: An LED emergency light is integrated into the side of the device, supporting three modes: low, high, and strobe. Low-brightness mode (10 lumens) is activated when adjusting CPAP parameters at night, providing basic illumination while ensuring a comfortable sleep experience. The battery life is over 100 hours. 2. Expanded Scenario: Powering Multiple Devices Simultaneously

　　Interface Compatibility: Equipped with two AC ports (220V/500W total power), two USB-C ports (supporting PD 60W fast charging), two USB-A ports (18W fast charging), and one DC 12V port, it can simultaneously power devices such as a CPAP, a mobile phone, a camping lantern, and a small refrigerator. Operation remains stable while keeping the total power draw under 500W.

　　Actual Load Performance: When connected to a CPAP (60W) + a mobile phone (20W) + a camping lantern (10W), the total power draw is 90W, with a stable output voltage of 220V ±5%. The USB-C port charges the phone at a speed of 1.2A, comparable to a single power supply.

　　3. Extreme Environment Performance

　　Rain Protection: The main unit interface area features an IP54-rated dust and water-resistant design. After a short period of use outside a tent in the rain (10 minutes of light rain), no water ingress was detected inside the interface, and the device started and powered normally. The solar panel is coated with an anti-fog coating, ensuring no loss of light transmittance after rain, and maintaining stable charging efficiency.

　　Dust and Sand Adaptability: The cooling vents have built-in dust screens. After use in dusty weather, the screens intercept over 90% of particulate matter. After disassembly and cleaning, cooling efficiency is restored to its original state, eliminating the risk of dust entering the internal circuitry.

　　IV. Functional Verification and Maintenance Details

　　1. Core Performance Test Data

　　CPAP Battery Life Test: Connected to a mainstream brand CPAP device (heating and humidification fully active, 75W power), the device lasted 6 hours and 42 minutes from full charge to automatic shutdown, with a deviation of ≤5% from the theoretical battery life. After switching to low-power mode (35W) during operation, the remaining battery life was sufficient for an additional 8 hours. Solar Charging Efficiency: On sunny days between 10:00 AM and 3:00 PM, the solar panel averages 88W of charging power, charging 440Wh in 5 hours, equivalent to a 20% to 95% charge, sufficient for a daily battery cycle.

　　Safety Limit Test: Simulated short circuit, instantaneous power outage with no sparks. After 4 hours of continuous operation at 45°C, the device's surface temperature reached a maximum of 52°C and the battery reached 63°C, without triggering the overtemperature protection.

　　2. Daily Maintenance and Lifespan Assurance

　　Battery Maintenance: The battery uses a lithium iron phosphate battery with a cycle life of ≥1000 cycles. The remaining charge after each use is maintained between 20% and 80%, with an annual degradation rate of ≤5%. This ensures stable performance for 3-5 years of long-term camping use. Cleaning and Storage: Surface stains can be wiped clean with a damp cloth. Before folding the solar panel, clean the surface dust to avoid scratching the coating. For long-term storage, it is recommended to recharge the battery every 3 months and keep the storage environment dry (humidity ≤ 60%).

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