Mcreator 2020.4 Solar panel

Please actually look at the procedures before asking questions.

Give the block boolean nbt data when it is placed.

Call the nbt data "canPower"

If (not) get block at (x, y + 1, z) is air AND (not) the time is night{

    set canPower to true

else set canPower to false.

If canPower is true your block will give out power.

If it is false, it won't.

I hope you connect this variable to the power giving procedure.

You should look around the wiki first

https://mcreator.net/search/content?keys=solar+panel