Does anyone know if using solar satellites to provide energy for your planet's defense is a good idea. In other words, if an attacker destroys your solar satellites at the beginning of the battle, will you cannons continue to fire at the attacker's fleet or will they stop working during the fight?

Defences that loose their energy do not stop working during the ongoing battle.
When a new battle starts afterwards the defences will work anymore according to the new energy levels on your planet.

I appreciate your answer. Thank you!