Carry forward, then expiry
Kansas net metering credits carry forward from month to month rather than being settled at the end of each billing period, which lets a strong spring or autumn month offset a weaker one.
That carry-forward is worth having. It means the system is judged across the year rather than month by month, which suits a household whose consumption and generation do not line up.
What it does not do is roll indefinitely. Credits expire annually on March 31, and nothing is paid for expired credit.
So the accounting year effectively runs to the end of March, and any credit still unused at that point simply stops being yours.
Why March is an awkward month to end on
A Kansas household builds credit through a productive spring and summer and draws it down through winter heating and short days.
March falls after the drawdown but before spring generation has properly recovered, which is roughly the low point of the credit balance for a well-sized system.
That is actually helpful. If your system is correctly sized, the balance should be near its minimum at exactly the moment the expiry falls, so little is lost.
If the balance is large in March, that is diagnostic: it means the system is generating more than the household uses across a year, and the surplus is being donated.
Sizing so that little reaches the expiry
Build from your last twelve months of bills rather than from available roof area. Ask what percentage of your annual usage the proposed system covers.
Kansas permits systems up to 150 percent of average annual consumption for full retail-rate credits, which is generous, but permitted is not the same as sensible.
Ask for the monthly profile with the credit balance tracked through to March 31. A balance that rises in summer and returns toward zero by spring describes a well-sized system.
A balance that only climbs describes one that is too large, and the excess is being handed over each March for nothing.
What belongs in the projection, and what does not
The 30 percent federal Residential Clean Energy Credit under Section 25D expired for property placed in service after December 31, 2025, so a cash or loan purchase in Wichita receives no federal tax credit, and Kansas has no state solar tax credit.
Section 48E survives at 30 percent for third-party owners under leases and power purchase agreements, so ask what a provider claims and what reaches you in the rate.
What exists is retail-rate net metering credit carried forward monthly and expiring on March 31, and the electricity you stop buying.
Ask for the monthly credit balance tracked through to March 31 and the percentage of annual usage stated, rather than an annual savings figure alone.