Kansas regulators can’t yet agree on how much to increase Kansas City Power & Light Co.’s annual rates.

The utility’s charges for customers with electric heating systems emerged as a key issue Tuesday during a public discussion by the Kansas Corporation Commission.

The KCC has until Sept. 10 to issue a written decision on KCP&L’s request to raise $67 million more annually from its 247,000 customers in the state’s northeast corner. The utility estimates its request would boost customers’ rates by 12.5 percent – or $11.67 a month for an average residential customer.

Each of the three commission members had a different figure for how much profit the company should be allowed to earn. Commissioner Pat Apple suggested a low figure if rates for customers with electric heating don’t drop.