- which could see Beijing plunge its enemies into darkness in the event of WW3 Energy officials are now assessing the risks posed by small communication devices discovered inside power inverters - an integral component of renewable energy systems that connects them to the power grid. While inverters are built to allow remote access for updates and maintenance, the utility companies that use them typically install firewalls to prevent direct communication back to China. But rogue communication devices not listed in product documents have been found in some solar power inverters by US experts who strip down equipment hooked up to grids to check for security issues, two sources told Reuters. Using these devices to skirt firewalls and switch off inverters remotely, or change their settings, could destabilise power grids, damage energy infrastructure and trigger widespread blackouts, experts said.