The Tennessee Valley Authority's Board of Directors will meet Thursday, discussing a possible rate structure change that could impact residential solar and energy efficiency investments.

The meeting in Muscle Shoals, AL sets the stage for the utility's proposed "grid access charge" that opponents say will discourage conservative energy practices and penalize customers who rely on home solar panels and energy-saving appliances.

The board is expected to vote on the change during today's meeting, but the board has not disclosed the amount of the grid access charge.