How to make a time schedule to shutdown and booting of WR21

Hello! My WR21 powered by solar panel system. Is there a way to shutdown WR21 during the nighttime and boot in the morning to save battery power? Thanks you!

The problem is the WR21 is either on or off when power is applied to the device.

the only way to reduce power would be to play with the power management and switch off the diffrent parts

else you could use a external time clock to switch it on and off