Wire and poles problem for AGL bid: ACCC

The ACCC's Rod Sims says the competition watchdog has concerns about a proposed takeover of AGL. (AAP)

Tech billionaire Mike Cannon-Brookes is serious about buying AGL Energy, and investors are keeping faith in the clean energy power play.

But regulators are keeping a close eye on the balance of ownership of the nation's poles, wires and generators, as consortium member Brookfield already owns network company AusNet in Victoria.