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The Energy Storage building stores a certain amount of energy. It begins to store energy once the Headquarters and the Energy Generators are full.

Upgrade levels and costs are identical to Titanium Storage

Property Hit Points Capacity Upgrade cost

HQ level

Upgrade time Icon
Level 1 710 3,500 700 1 15 minutes
Level 2 1,050 7,000 1,700 2 30 minutes
Level 3 1,410 14,000 3,500 2 1 hour
Level 4 1,750 22,000 7,000 3 2 hours
Level 5 2,120 40,000 23,750 3 4 hours
Level 6 2,630 90,000 57,000 3 6 hours
Level 7 2,920 110,000 95,000 4 8 hours
Level 8 3,050 430,000 237,500 12 hours
Level 9 3,220 855,000 250,000
18 hours
Level 10 3,360 1,905,000

1 day
Level 11 3,560 3,605,000

2 days