depending on the temperature of your planet building past level 20-24 isnt profitable.
i suggest to increase the production and decrease the building costs at higher level.
at the moment with every level building solar plant becomes 1.5 times more expensive.
decrease that rate to 1.4 at level10 and 1.3 at level20
additionaly add a bonus depending on the temperature of the planet.
e.g. 40°C would mean 20% production bonus
100°C 50%
planets with 0°C or less wouldnt be affected.
i suggest to increase the production and decrease the building costs at higher level.
at the moment with every level building solar plant becomes 1.5 times more expensive.
decrease that rate to 1.4 at level10 and 1.3 at level20
additionaly add a bonus depending on the temperature of the planet.
e.g. 40°C would mean 20% production bonus
100°C 50%
planets with 0°C or less wouldnt be affected.