Your first electricity bill after solar, line by line

A bill has two halves, and we can measure them

Electricity reaches you through two distinct businesses. Somebody generates it, and somebody delivers it over poles, wires and substations they have to maintain, insure and replace. You pay for both. Most American households never see the division, because their utility bills the two together as bundled service.

In restructured retail markets the division is explicit: you buy energy from a competitive supplier and delivery from the incumbent wires company. And because those are two different companies filing two different returns, the federal government's utility census records them as two separate rows for the same electricity. One row is the supplier's energy sale. The other is the incumbent's delivery of that same electricity to the same customers.

That is an unusual opportunity. Comparing the revenue on those two rows gives the delivery share of a real bill, from mandatory filings rather than from a survey or an estimate. So we computed it.

Across 11 states and 14,659,508 residential customers on competitive supply in 2024, delivery accounted for 53.2% of what those households paid. Slightly more than half of the bill was not the electricity at all. It was getting it to the house.

The range between states is wide and it is not random. California sits highest at 61.2%, New Jersey lowest at 26.2%. A state with expensive terrain, long distribution runs, wildfire hardening obligations or a large recovery of past capital spending puts more of the bill on the delivery side. A state with cheap wires and expensive generation puts less.

Why the spread between states is this wide

A 35.0% gap between the top and bottom of that table is larger than most people expect, and it is not noise. It reflects two different things being expensive in different places.

Delivery costs are about physical plant and obligations. Long distribution runs to dispersed households, difficult terrain, undergrounding, storm hardening, wildfire mitigation and the recovery of past capital spending all land on the delivery side of the bill. A state carrying large programmes of that kind puts more of the bill there, whatever its generation costs.

Energy costs are about what it takes to produce the electricity: fuel prices, the generation mix, and what the wholesale market is doing. A state with cheap gas or abundant hydro has a smaller energy half, which mechanically raises the delivery share even if its wires cost the same as anywhere else.

That is why the ratio has to be read as a ratio. A high delivery share can mean expensive wires or it can mean cheap power, and this measurement alone does not distinguish them. What it does establish, in every state we could measure, is that delivery is a substantial fraction of the bill rather than a rounding item, which is the part that matters when someone tells you a bill will disappear.

Why the first bill in particular surprises people

Beyond the structure of the bill, the first one after switch-on has timing problems of its own.

It usually covers a period before your system was producing. If permission to operate arrived mid-cycle, the statement spans weeks of ordinary consumption plus a short period of generation. It is not a representative month and it should not be read as one.

The meter change may not align with the billing cycle. Net metering generally requires a meter capable of measuring flow in both directions, and its installation is a separate visit on the utility's schedule rather than yours.

Credits may lag. Depending on the arrangement, exported energy may appear as a credit on the following statement rather than the current one, so the first bill can show consumption without the offsetting credit.

And the season is doing a lot of work. A system commissioned in November in a northern state is producing at close to its annual minimum. The same system in June is a different experience. Judging a twenty-five-year asset on one winter statement is the most common error at this stage.

What would actually get the bill to zero

A zero bill is worth stating plainly in terms of what would have to be true, because it clarifies why it so rarely is.

You would need production that covers your full annual consumption, credited at a rate that offsets both halves of the bill, on a tariff with no fixed customer charge, no minimum bill and no non-bypassable charges. Each of those conditions fails somewhere, and they frequently fail together.

This is not a criticism of solar. A system that cuts a bill substantially is doing exactly what it should, and the savings are real and compound over decades. The problem is a specific claim, made in sales conversations, that the bill goes away. It generally does not, and the reason is visible in the structure of the bill rather than in the performance of the panels.

If a proposal projected something close to zero, the thing to do is not to doubt your hardware. It is to go back to the proposal and find which of the conditions above it assumed, and whether that assumption matches your tariff.

What to do if the numbers genuinely look wrong

Most first bills that look alarming are explained by the period they cover, the season, or a credit that lands next month. A minority are not, and it is worth knowing how to tell the difference before you either panic or dismiss it.

Start with production, not with the bill. Your monitoring platform reports what the system generated. If production is close to what the proposal projected for that month, the system is working and the question is about your tariff or your consumption, not your hardware. If production is well below it, that is a different conversation and it belongs with your installer while any workmanship warranty is live.

Then check consumption. Compare kilowatt-hours drawn from the grid against the same month a year earlier. A new electric vehicle, a heat pump, a new occupant or a hot summer will move that number regardless of what the panels are doing, and it is the most common explanation for a bill that disappoints against a projection.

Then check the tariff you were actually put on. Interconnection frequently moves a customer to a different rate schedule, and a different rate schedule can change the fixed charges, the per-kilowatt-hour rates and the export credit all at once. Ask your utility which schedule you are on now and which you were on before. Proposals are commonly modelled on the old one.

If all three check out and the bill still looks wrong, you have narrowed it to a billing question with evidence attached, which is a far stronger position to raise with a utility than a general complaint that the bill is higher than expected.