Portable power supply product integrates power generation, storage, transformation and power supply, which can support PV power generation and provide AC/DC power for a long time without power grid. MPPT (Maximum Power Point Tracking) technology of PV power generation, lithium battery charging management strategy, lithium battery car-level pack technology, BMS technology, EMS technology, energy monitoring technology, load detection technology, AC/DC conversion technology, fault self inspection, self repair technology, self frequency modulation technology are applied.