Your first solar bill: what to check (2026)

A solar system can change your energy flows without eliminating the utility bill. For the first bill, check the billing period, tariff enrollment, imported and exported kWh, and charges that remain. Do not compare one partial month with a full pre-solar month and call the difference annual savings.

Start with dates and the correct account

Check installation, permission-to-operate, meter and tariff-start dates against the bill's start/end dates. Record actual versus estimated readings. Ask whether export credits appear on the same bill or on a later settlement statement. Loan, lease or PPA payments may arrive separately and are part of the household cost comparison.

Reconcile energy before reconciling dollars

The inverter reports generation; the utility generally measures grid exchanges. Energy consumed onsite may never appear as an export. Match units and dates before assuming the meter is wrong. Imports can remain at night or when household demand exceeds current production, even when annual solar production is substantial.

Find the tariff's credit and charge rules

Check the import rate, export credit, fixed/customer charges, minimum-bill provisions and other applicable charges. Some credits cannot offset every line item. A credit balance is not necessarily cash payable on request. Do not assume all utilities use a 12-month true-up, the same rollover rules or the same treatment of unused credits.

As one scoped example, CPUC describes monthly bill payments with credit rollover until annual true-up under the net billing tariff for PG&E, SCE and SDG&E. That statement is not a universal billing schedule, and legacy NEM accounts need their own terms checked.

Build a useful comparison

Track a complete series of bills, usage and generation rather than extrapolating the first statement. Compare weather, occupancy, new appliances, tariff changes and billing days. Show financing payments and maintenance separately from utility-bill reductions. The CFPB's 2024 report warns about promises that solar will eliminate future energy bills; that is not a reliable household forecast.

If a charge or credit looks wrong

Collect the bill, tariff, interconnection approval, meter identifiers and matching-period monitoring export. Ask the provider to explain the specific line and rate, and keep the case number. Contact the installer about production or monitoring issues. Follow the provider's dispute process before escalating to the relevant regulator or consumer office.

Read net metering versus net billing and use the payback tool only after making a supportable net-savings assumption.

Before you decide

Match billing days, tariff-start date and meter readings to the same period.
Record generation, imports and exports as separate energy quantities.
Find credit rollover/expiration, cash-out and settlement rules in your own tariff.
List fixed charges, financing payments and any minimum or production-based charges.
Document discrepancies with the bill line, tariff reference, meter data and a support case number.

Sources and review limits

Source review: 2026-09-24. This is our access/review date, not the publication date of every source. Billing examples illustrate named programs only; the current contract and tariff govern your account. Checklists are editorial buying questions, not individual tax or engineering advice.