In broad strokes, let’s say the city was supposed to receive $1,000,000 in credits annually with a 30% discount for the credits being paid to the solar developer.
Per the original terms and usage patterns, the city would pay $700,000 annually for the $1,000,000 in credits, saving 30% or $300,000.
In this situation the initial savings of $300,000 actually turns into a net even exchange ($1,000,000 credits – $300,000 savings = $700,000 credits – $700,000 actual costs).
Although they could roll those $300,000 extra credits over, their fiscal year was coming to an end in June and, even with the virtual net metering program in place, they were ultimately paying the same amount since they were still paying the developer for their credits in addition to their own energy bills.