Without resetting all data - a workout appears to be

storage.db['rooms.objects'].update({ type: "spawn" }, { $set: { storeCapacityResource: { energy: 300 } } });
storage.db['rooms.objects'].update({ type: "extension" }, { $set: { storeCapacityResource: { energy: 200 } } }); // or 50/100 depending on RCL
storage.db['rooms.objects'].update({ type: "link" }, { $set: { storeCapacityResource: { energy: 800 } } });
storage.db['rooms.objects'].update({ type: "tower" }, { $set: { storeCapacityResource: { energy: 1000 } } });

Re: room.energyAvailable returns null on private server

This issue still appears when I am running Server version 4.2.15 on Windows 11. Every time the server stops this issue appears - I have to reset the private server with system.resetAllData()

Issue as logged on the github --> https://github.com/screeps/screeps/issues/116

In the meantime, is there a command to gracefully shut down the server or something else I should be doing to avoid this problem in the first place?