SoBRA: the clause that lets Florida utilities bill for new solar before the next rate case

I. How a SoBRA step actually works

Look at the base rate line on your Florida Power and Light or Duke Energy Florida bill, the part that is not fuel and not taxes. That is where new solar now shows up. Over the last several years both utilities have been building large solar plants across the state, each one on the order of 74 to 75 megawatts (a mid-size plant covering a few hundred acres), and they have been nudging base rates upward as those plants switch on.

The tool that lets them do this has an unlovely name: a Solar Base Rate Adjustment, or SoBRA. It is a clause written into the rate settlement agreements that the Florida Public Service Commission (the five-member state board that sets what regulated utilities may charge) approved for each company. In plain terms, it lets a utility recover the cost of an approved solar plant through a small, scheduled base-rate increase when the plant reaches commercial operation, instead of waiting for the next full rate case. A full rate case can take the better part of a year and reopens every cost the utility has. A SoBRA is narrower, and that is the whole point of it.

II. What the settlements fence in

A SoBRA is not a blank check, because the settlement that created it sets the fence posts. The agreements cap how much solar can ride through the mechanism, usually stated as a yearly megawatt limit (FPL's 2016 settlement, for example, allowed roughly 300 megawatts a year through the SoBRA at last public report). They also require each project to clear a cost-effectiveness test, which is regulator shorthand for the plant having to pencil out as a better deal for customers over its life than the alternatives the utility could build or buy.

On top of the caps and the test, the commission itself reviews each step before it takes effect. The utility files the project cost and the proposed rate change, commission staff and the state's Office of Public Counsel (the office that represents ratepayers in these cases) get to examine it, and the commissioners vote. If actual costs come in different from the projection, the settlements provide for a true-up so the step reflects what the plant really cost, not an early estimate.

III. How to trace a plant to your bill

You cannot tell from the bill itself which plant you are paying for, because the base-rate line blends everything together. To connect a step to a specific project, you follow the paper. FPL serves the east coast from Brevard County down through Palm Beach and Miami-Dade, the southwest around Fort Myers and Naples, and much of the Panhandle. Duke Energy Florida serves a band of central and north Florida, including the suburbs north of Tampa Bay and up toward the Nature Coast and the Gainesville area. Both name their solar centers after the places they sit in, from Manatee and DeSoto counties to the rural stretches of Hamilton and Columbia counties.

The trail starts at the Public Service Commission. Each utility files its SoBRA projects, costs, and proposed rate steps in the docket for its rate settlement, and those filings are public through the commission's online Clerk's Office search. Match the plant name in the filing to the solar center the utility has announced online, read the Office of Public Counsel's comments for any pushback, and you can see the step before it reaches your meter. It takes patience, but none of it is hidden.

IV. Worth watching this month

1. Check the FPSC Clerk's Office docket search for the current FPL and Duke rate settlements, the first place any new SoBRA step filing appears (routine to watch, but it is where a step surfaces).

2. Watch for a SoBRA true-up or a fresh step filing this winter, since these tend to cluster around year-end as plants reach commercial operation.

3. Follow the Office of Public Counsel's activity in those dockets, because objections to a step usually show up in its comments first.

4. Read your own base-rate line in the first full month after a utility announces a new solar center online, where a step would land.

5. Scan the commission conference agendas for when a pending SoBRA matter is scheduled for a vote, most of which are routine while a contested one is not.

Does a SoBRA raise my bill more than a regular rate case?

Not necessarily. A SoBRA is a smaller, single-purpose step tied to one set of solar plants, so the increase depends on the plant cost spread across all customers. Each step is usually a modest change rather than a sweeping one.

Can the utility use a SoBRA for anything besides solar?

No. The clause is written only for approved solar plants under the settlement. Other costs still move through the fuel clause or a full rate case.

Who approves each step?

The Florida Public Service Commission. The utility files, staff and the Office of Public Counsel review the numbers, and the commissioners vote before the step takes effect.

Is SoBRA a permanent part of my rates?

No. It lives inside a specific multi-year settlement. When that settlement expires, the mechanism has to be renewed in the next agreement or it ends.

How do I know which plant is on my bill?

You cannot tell from the bill, because the base-rate line blends everything. To tie a step to a plant, you follow the utility's filing at the FPSC and match the project name.