I just feel its capacity is too small, any one does? Player are almost only in two states, lacking energy or wasting energy. I check the PADB, the capacity of energy storage is only 100K. It gets fully filled by a single T1 power plant in just 166 sec. But we all have much more power plants rather than single one. Building a T1 factory requires about 34K to 54K power. Building a T2 factory requires about 270K power, which is near the capacity of 3 energy storage. On the other hand, the metal storage is very useful. Because the metal extractor is cheaper than factory, sometime the player needs a little time to build more factories and catch up the income. The metal storage can greatly reduce the waste. It get 20K capacity. Just 2 metal storage can store the metal of a Titan! Please consider the energy efficiency, the required energy per metal of T1 fabricator is about 57 to 88. But the capacity of energy storage is only 5 time of the metal storage's. The capacity of energy storage is really too small. I think the appropriate capacity for energy storage is about 500K ~ 1000K.