Applicable Meter for Your Solar Project 
 Bi-Directional Meter
The bi-directional meter relates directly to net metering, and allows Ameren Missouri to record the amount of energy delivered to the customer and the amount of energy fed back to Ameren Missouri.

Typically, the one-time charge for the bi-directional meter is $281 for a 1-phase meter or $187 for a 3-phase meter. However, in some cases, more work is required than simply replacing the meter resulting in higher charges.

The cost of the bi-directional meter and any additional work required to support a net metering installation is quoted in the net metering application design approval letter/email that is sent to the customer and installer. The cost quoted will appear on your Ameren Missouri bill by the next billing cycle after the project is completed and the meter is installed.

You will know the bi-directional meter has been installed when you see a red sticker that reads "Warning Alternative Generation Source."

A bi-directional meter only records billing data. It does not record the total amount of energy produced by the renewable system. Only kilowatthour (kWh) fed back to the grid and kWh delivered by Ameren Missouri will register on the bi-directional meter. If the system is producing power and the property is using the power simultaneously, the bi-directional meter does not record the produced and used power - essentially they cancel each other out.

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