1: Wipe the surface stains, check whether it is broken or not, if there is no abnormality, move the machine to a cool and ventilated place to stand for 1-2 hours, and try to charge the battery after it cools down.
2: Remove coverings to ensure that the solar panel is fully exposed to light; avoid high-temperature environments and place the device at a suitable temperature.
3: Make sure the charging settings are correct; if still not solved, please upload the log.