The programme that closed
In 2019 the Georgia Public Service Commission required Georgia Power to offer true monthly netting to residential solar customers, but capped enrolment at 5,000 customers in total.
The cap filled in 2021. The programme has been closed to new participants since, so nothing you install today can join it.
Existing participants continue under their agreements, which carry 15-year limits and expire no later than December 31, 2038.
Monthly netting settles your generation against your consumption across a whole billing period rather than instant by instant, which means midday production offsets evening consumption within the month. Under instantaneous netting it does not.
Why this matters when a house changes hands
The difference between the two programmes is not cosmetic. Monthly netting values a much larger share of the generation at the retail rate; instantaneous netting exports anything above your instantaneous demand at the avoided cost rate.
So two identical arrays on two identical houses can produce quite different bills depending only on which agreement is attached.
Ask the seller which programme the system is on, when the agreement was dated, and how many years remain on it. Ask to see the documentation rather than accepting a description.
Ask also whether the agreement transfers to you on sale and what has to be done to effect that. An agreement that does not survive the transaction is worth nothing to you regardless of what it was worth to the seller.
The rest of the diligence on an existing array
Beyond the programme, ask for the original installation date, the equipment make and model, and what warranty remains on the panels, the inverter and the workmanship. Inverters typically have shorter lives than panels.
Ask for production history rather than a production estimate. An existing system has real data, and real data is worth far more than a model.
Ask about the roof underneath. A system installed on a roof that is now near the end of its life implies a removal and reinstallation cost that belongs in your purchase arithmetic.
Ask whether the system is owned outright, financed, or on a lease or power purchase agreement. Those are entirely different things to inherit, and only the first is straightforwardly an asset.
Costing it out against a capped programme
For a new system, the 30 percent federal Residential Clean Energy Credit under Section 25D expired for property placed in service after December 31, 2025, and Georgia has no state solar tax credit, so there is no tax credit at either level for a cash or loan purchase.
Section 48E survives at 30 percent for third-party owners under leases and power purchase agreements.
A new system joins RNR-Instantaneous Netting, which pays the Solar Avoided Cost Rate for anything exported beyond your instantaneous demand and gives full retail value only for what you consume as it is generated.
For an existing system, the arithmetic starts with which programme it is on and how long that agreement runs. Get that in writing before you agree a price, because it is the single fact that most changes what the array is worth to you.