UK Power Networks are working to fix the issue that is affecting homes in and around Halesworth on Friday morning.
The power company has said that 827 customers are currently without electricity.
The outage was originally affecting more than 1,500 homes and businesses, but some people have had their power restored remotely.
A statement on UK Power Networks’ website reads: “We have already sent staff to the area, but at the same time we try to restore power remotely by redirecting the electricity around the faulty section.
“It’s possible your power may go on and off as we try to restore as much power as we can. The engineer will head to the local substation and after checking the network, will attempt to restore more power from there.
“If unsuccessful, they will locate and repair the issue, which will take longer to get the lights on.”
UK Power Networks has said power is expected to be restored by 2pm.