Protections soft start:
1. Output short: shutdown.
2. Input polarity reverse: by fuse.
3. High voltage input: shutdown.
4. Low voltage input: shutdown.
5. Overload: shutdown.
6. Overtemperture: shutdown after buzzer keep sounding for one minute.
7. Battery low: alarm.
8. Intelligent fan control.
9. Trouble display: LED.
Cooling: wisdom fan start: when the output reach 200W the temperture reach 45℃, the fan will start automatically.