What happens when a planet's energy production falls below the amount consumed by its resource production buildings, that is, when the Total for the Energy column is displayed in red on the Resources page?

I know I can adjust resource production to bring energy used down to the amount being produced, but what happens while total energy is in the red? Is resource production cut automatically? Any other ill effects?

Nah no other effects.
Just mines production is cutted low.
They produce less than their potential.
That said, you can always use solar sats and fusion reactors.
Solar sats works more efficiently in hot planets and cold planets make more deut thus makes more sense to use higher levels of fusion.

Thanks.

Does the hot planet bonus also apply to solar plants?

I would think that a hotter planet means better solar plants.

I know solar satellites is tied to how hot the planet is.

But I wouldn't build solar satelittes until you have enough resources to build level 2 grav tech. (Have someone crash you as too many sats attract people in search of easy resources and attacker points.)

You can lower your mines production if you are in red, add some solar plants, solar sats (Though risky as described above), or use fusion reactors to get more energy

You missed a 'nt' Vixie...
You actually meant you "wouldn't think that a hotter planet means better solar planets"..
Doesn't make sense I know, but gozars fleet fit on a single moon.
There are even stranger things in zorg universe...
(Don't tell anyone I told you this, but there's a black hole at beginning of world's that swallows all approved game implementation.. last thing I saw going through it was an elite recycler)

Lol feeling cheeky today, huh Persian?

Idk what cheeky is but I'm great today , thnx ma'am

It means you are being a smartaleck in a cute way.

Uh , thnx
Not as cute as your geek son tho

That would to achieve. *pat pat*