Put the contents below Config in your gameusersettings.ini and change what you want to if your on a server you need to this on the server gameusersettings.ini not the client.
I you don't put this in your config it will run at defaults.

[PixPlus]
SmallBoxStorageSize=30
StandardStorageSize=75
SmallVaultStorageSize=85
HugeVaultStorageSize=600
BookcaseStorageSize=170
FabricatorAmountElectric=250
FabricatorCraftSpeed=1.0
GrillAmountElectric=250
GrillCraftSpeed=3.25
CookerAmountElectric=250
CookerCraftSpeed=3.25
ForgeAmountElectric=250
ForgeCraftSpeed=2.5
GrinderAmountElectric=250
GrinderCraftSpeed=1.0
ChemAmountElectric=350
ChemCraftSpeed=4.0
GeneratorGivesElectricAmount=750