Here are some common questions about solar energy and our net-metering program. This information is for reference only and we encourage you to talk with a contractor and independently verify all current information related to solar prior to signing any installation agreement or contract.

How much do these systems typically cost?

Estimated system costs can be roughly approximated at $2.75 – $4.50 price per watt (PPW) (8,000 W system x $2.75 to 4.50 PPW = $22,000 to $36,000).

These prices have been declining over the past few years as the industry has grown. Nationally, a considerable amount of the project cost is in the installation process.

Clark Public Utilities recommends that customers obtain cost estimates from several contractors before moving forward on installing solar generating systems.

Is there financing available?

Some contractors offer financing or payment plans. Please inquire with the contractors about what they provide. Clark Public Utilities also offers financing up to $30,000. For more information, please see our solar loan page.

What are the federal incentives?

There is also a federal tax credit available.

What if I generate more than I use?

If production exceeds consumption, the utility allows customers to carry a credit from month to month. On March 31st of each calendar year the excess production is cleared from the customers balance per Washington State RCW 80.60.30.

What is the process?

The attached flow chart shows the process graphically.

How long does the process take?

The length of the process has several different variables. Once Clark Public Utilities receives the interconnection application the process begins. The application is usually processed within two working days. This includes our Technical Services department reviewing the electrical schematics. Once the application is approved, the contractor can build the system.

Then once the project is complete, we ask the contractor to email us proof that the electrical inspection has occurred by the permitting agency. Clark Public Utilities then verifies the inspection has passed and confirms that the fees have been paid to the Utility. After confirming those items, a meter technician is assigned to install the meters. Typically, the Utility installs the new meters within five working days.

Clark Public Utilities is not responsible for lost production credits due to any delays in the installation process.

Note: This process can take longer for systems sized over 25kW.

What is Clark Public Utilities role in the process?

Clark Public Utilities is there to make sure there is a safe and reliable connection between your generation system and the electrical grid. The Interconnection Application provides the necessary guidance for installation. Once the system has been installed, Clark Public Utilities maintains the monthly billing and the net-metering credits.

What is the customer’s role in the process?

The system is purchased by the customer. All terms and agreements surrounding that purchase are between the customer and the contractor. The application and meter fees can be paid by either the customer or the contractor depending upon what agreement has been made between the two parties. The application needs to be signed by the owner of the system.

Also, the system will need to be inspected by the local permitting agency. Depending upon where the worksite is located will dictate which agency.

What is the contractor’s role in the process?

The contractor can assist the customer with the interconnection agreement process, but the owner must sign agreement.  The contractor is responsible for installing the system and is point of contact for Clark Public Utilities if there are any questions about the installation. Once the installation is complete, it is helpful for the contractor to notify Clark Public Utilities to expedite the process.

Who are the solar contractors?

You can find a list of contractors participating in the utility’s Contractor Network link to Contractor Directory here.