... 3, USB 4, outdoor thin film solar panel1, portable solar film panel2, apply for mobile phone, laptop ... , DPE thin rolled solar power panel ( Figure 1)2, 12V AC / DC inverter power supply ( Figure ... 2)3, 12V lithium battery ( Figure 3)4, solar power voltage ... equipment and other factors TroubleshootingI, check the solar power panel and device connection. See operation ...