Solar Panel Cost in Iowa (2026)

Net metering: Inflow-outflow distributed generation billing

Iowa does not use classic net metering. Under Senate File 583, codified at Iowa Code Section 476.49, Interstate Power and Light and MidAmerican Energy file tariffs using either a net billing or an inflow-outflow method, and both use inflow-outflow. Energy you consume from the grid, the inflow, and energy you deliver to it, the outflow, are recorded separately rather than combined into a single net figure. Each is then billed or credited according to the tariff, and where outflow exceeds inflow in a period the resulting credits carry forward to future billing periods. The practical difference from classic net metering is that the two flows are tracked separately, which makes the timing of your generation relative to your consumption matter more than it would if the meter simply ran backwards and forwards against one balance. Electricity you consume at the moment it is generated never becomes inflow at all, which is the most valuable outcome. The arrangement also has a horizon. Iowa Code Section 476.49(4) requires the Iowa Utilities Commission to develop a value of solar methodology and rate when statewide distributed generation penetration reaches 5 percent, or if a utility petitions after July 1, 2027, whichever is earlier. Regulators have meanwhile ordered modest revisions that broadly continue the current arrangement in the near term. Ask any installer what the projection assumes about compensation after that transition rather than accepting current terms held flat for twenty-five years.