The core operating principle of portable solar power stations relies on bidirectional transmission of complete power links: DC power input transmission from front solar panels, internal mainboard inverter conversion transmission, and rear AC power output transmission. Transmission loss, voltage stability, anti-interference capability and load adaptability of the whole link directly determine power supply stability, normal startup of electrical appliances and overall safety protection performance. Most low-cost portable solar power stations on the market have inherent link transmission defects, including low conversion rate of photovoltaic input links, high loss during AC-DC inverter transmission, obvious voltage fluctuation of AC output links, disordered current during parallel connection of multiple devices, and unstable transmission under high and low ambient temperatures. These defects commonly cause slow photovoltaic charging, failure to drive high-power appliances via AC outlets, frequent appliance restart, electrical damage caused by unstable voltage, and forced shutdown due to overheating under full load. Focusing on complete power link transmission, this portable solar power station with AC outlet reconstructs a closed-loop power transmission system, optimizing five core transmission channels including photovoltaic input link, DC-DC boost link, AC inverter conversion link, multi-channel shunt transmission link and safety protection link. It reduces overall transmission loss, strictly controls voltage and current fluctuation, and adapts to full-scenario transmission demands including outdoor photovoltaic charging, high-power AC mains output and simultaneous power supply of multiple ports. It solves common defects of traditional energy storage stations such as high transmission loss, unstable power supply, weak load capacity and poor environmental adaptability, realizing low-loss, high-stability and safe power transmission from light energy input to AC mains output.

　　High-efficiency photovoltaic input link reduces power transmission loss during photoelectric conversion. Outdoor solar charging is the core self-charging method for portable power stations. Ordinary stations adopt input circuits with high impedance, resulting in more than 15% transmission loss of converted DC power and low charging efficiency even under strong sunlight. Equipped with thick tinned copper core transmission lines and independent photovoltaic voltage stabilization chips, this portable solar power station with AC outlet builds a low-impedance lossless input link. The link adaptively adjusts input current according to real-time sunlight intensity, avoiding current overload under strong light and transmission interruption under weak light. It maintains stable transmission rate even on cloudy days with insufficient sunlight. The overall transmission loss of photovoltaic input link is reduced by 8% compared with ordinary products, greatly improving solar charging speed and shortening outdoor self-charging time for outdoor scenarios without municipal electricity.

　　Closed-loop DC-DC boost transmission link stabilizes internal DC power. The original DC voltage output by battery cells has minor fluctuations, which will cause AC output voltage deviation and affect normal operation of electrical appliances if transmitted directly to inverter modules. Built with independent closed-loop DC-DC boost transmission link, this power station realizes real-time voltage regulation, filtering and rectification for battery output DC power. It filters circuit clutter and current pulses, and calibrates fluctuating DC power into constant standard voltage. The closed-loop isolated internal DC transmission link avoids electromagnetic interference inside circuits, ensures pure and stable power input to the inverter module, eliminates AC output voltage drift fundamentally, and consolidates the transmission foundation of the entire power link.

　　Pure sine wave AC inverter transmission link replicates household mains power waveform. The AC output transmission link is the core channel of this power station. Different from inferior modified sine wave and square wave inverter links, it adopts pure sine wave inverter transmission technology, whose output waveform, voltage frequency and current phase fully comply with 220V household mains power standards. There is no harmonic interference or voltage spike during transmission. It is perfectly compatible with precision electrical appliances sensitive to current waveforms, such as refrigerators, projectors, laptops, coffee machines and small medical devices. It avoids abnormal noise, overheating, operation stutter and mainboard damage caused by abnormal link transmission, delivering AC output power with the same quality as household wall sockets and covering most household AC electrical appliances.

　　Independent multi-channel shunt transmission link ensures non-interference parallel power supply. Users often connect devices to AC outlets, USB ports and Type-C ports simultaneously in daily use. Ordinary power stations adopt one shared main transmission bus, leading to severe current competition during multi-port output, sudden AC voltage drop and startup failure of high-power appliances. This power station applies main bus control plus independent shunt transmission architecture. The AC output link, DC fast charging link and standard USB link are physically isolated, equipped with independent current control chips respectively. When multiple devices work under full load simultaneously, each link supplies power independently without occupying mutual power. The AC output port maintains stable standard voltage all the time, meeting parallel transmission demands of powering AC appliances, fast charging mobile phones and portable fans during camping.

　　Full-range temperature control and overload protection transmission link safeguards transmission safety under harsh working conditions. Outdoor strong sunlight exposure, severe cold and instantaneous high-power impact will damage transmission stability and even burn internal transmission circuits. Equipped with intelligent link temperature control system, this power station monitors real-time temperature of the whole transmission link, automatically reduces transmission power and activates heat dissipation protection under high temperature, and preheats internal circuits to improve conductivity under low temperature. Meanwhile, triple protection mechanisms including overload protection, overvoltage protection and short circuit protection are integrated. It cuts off AC output link within milliseconds once external load exceeds rated power, blocking fault current backflow and protecting both internal circuits and external electrical appliances. With fully optimized closed-loop power transmission links, the portable solar power station with AC outlet realizes efficient and stable transmission covering light energy input, internal conversion and AC output. It serves as a reliable portable energy storage power source with stable link transmission performance for outdoor camping, self-driving trips and indoor emergency power cuts.