This is firmly at odds with the current proposals to see the new company set up with the auspices of National Grid.
Critics argue that this influence could give the company an unfair advantage because it also receives regulated income from owning and maintaining energy networks while bidding for government support to build new power interconnectors to neighbouring European countries.
This news was "slightly positive", RBC analysts said in a research report Thursday as the "earnings and asset base relating to the system operator role will remain with National Grid and contribute towards its bottom line".
On Tuesday, Sunrun announced the partnership with National Grid, one of the world's largest investor-owned utilities, which serves more than 20 million people in the U.S., as well as running the grid in the United Kingdom.
The move mirrors a similar decision by United Kingdom media and communications regulator Ofcom to require BT Group PLC to create a separate board for Openreach, BT's network infrastructure arm.
The plan is created to help keep household bills down by working to ensure and enable more competition, coordination and innovation across the system.
National Grid is also committing to better understanding "the transformation occurring in the sector", and is set to work with Sunrun to "explore options of how distributed energy resources might be aggregated and used to help keep the energy grid balanced and optimized". "The Government and Ofgem have recognised our vast experience and expertise in balancing the electricity system and ensuring the market runs efficiently, said John Pettigrew".
The new operator would carry out existing functions such as balancing power supplies as well as roles such as promoting so-called smart solutions to manage increasingly complex energy flows.
Ofgem chief executive Dermot Nolan said that, as the UK's energy system changes to allow for decarbonisation, decentralisation and greater energy flexibility it is "important that all the monopoly networks adapt".
The formation of a legally separate entity within National Grid and wholly owned by it means that the company will avoid being broken up.