To limit the injection of energy into the network, you must go to OS ONE. 

Once logged in, you must go to the "Settings" tab in the "Flow Management" section. You should then see the parameter "Authorize injection into the network" and just below it the parameter "Maximum injection power". It is with the latter that you can adjust, as you wish, the amount of energy sent to the network. Remember to confirm by pressing the "OK" button otherwise your changes will not be taken into account.