I have solar panel I connect the charge controller after 6 month the light during night time the light on and off every 30 second.

Question edited for clarity.
Question moved to RVs.

It shouldn't do unless the controlling software is faulty. There should be a diode that only lets electricity flow from the solar panel to the battery in sunlight, but shouldn't allow electricity to flow back to the solar panel at night.

Batteries should last 4 to 6 years if they are looked after, and during the winter months, they should be on a battery minder to keep them trickle charged.

Any electrical items in the trailer tent like fridges, microwaves, televisions, heaters, AC etc, may be drawing some power when not in use either by design (standby) or by error (parasitic draw).

connect a 20amp bridge rectifier across output of solar panel to battery you can use a timer switch on it or regulator good luck

yes
they have installed a small aa battery that is charged during the day by the solar panel and run until flat at night

Place the solar panel in a sunny spot to charge the batteries. If the lights do not come on at night, the panel's light sensor may be seeing other light sources and needs to be moved. The light sensor looks like a small white circle with a wavy line across it. They are usually visible and located in the solar panel. Make sure it is in the dark at night, or it will not come on. You can cover the light sensor to test that the lights are working.

That's an issue with the inexpensive charge controllers that is known. The internal voltage regulator and pulse width modulator isn't performing correctly and interpreting the power from the panel. I recommend you look at getting an AIMS Power charge controller. Their 30A model is flawless.

photo cell is bad it detects when the sun goes down and connects the circuit

If you connect to solar panel for the lights to go on do the lights go out at night? If so, and the they do not light when hooked to the batteries then the batteries may have no charge and may also not be holding a charge. Put in new batteries to test.

As you will see from the extract from the web site, these watches are solar powered.

" Tough Solar Power

• Shock Resistant
• 200M Water Resistant
• 29 times zones (48 cities), city code display, daylight saving on/off
• 4 Daily Alarms and 1 snooze alarm
• Countdown Timer
  Measuring unit: 1 second
  Countdown range: 1 second to 60 minutes
  Other: Auto Repeat
• 1/100 second stopwatch
  Measuring capacity: 23:59’59.99”
  Measuring modes: Elapsed time, split time, 1st-2nd place times
• Auto Calendar (pre-programmed until the year 2099)
  12/24 Hour Formats
• Accuracy: +/-15 seconds per month (with no signal calibration)
• Storage Battery: CTL1025
• Battery Power Indicator
• Power Saving Function
• Approx. battery life: 6 months on full charge (without further exposure to light)
  Module 5055"

The light will only stay on as long as the battery lasts. My guess is that will not last all night. What you can do is buy a light sensor switch (or even a light sensor socket adaptor is available to save you from having to wire it in) to keep a light on during the night. You can use a CFL or even an LED lamp to save electricity, but it is unlikely that a solar-charged cell will power even one of thes all night long.