Solar Estimate Checklist: What to Prepare and Ask (2026)

Booking a solar estimate is the easy part. Knowing what to have ready and what to actually ask during the appointment is what determines whether you walk away with a clear, comparable quote or a confusing packet of numbers you have to decode later.

This checklist covers exactly what to gather before your call or site visit, what a consultant should walk you through, and the questions that separate a fair, well-built estimate from one padded with extra margin. Whether you already requested a free solar estimate or you are about to book one, use this as your prep guide.

Before You Book: What to Have Ready

Your Utility Bill and Usage History

The single most useful document for an accurate estimate is twelve months of your utility bill, not just your highest or lowest month. Usage swings seasonally, since summer bills often run 30% to 50% higher than winter bills due to air conditioning. A consultant who only sees one summer bill will size your system too large, leaving you paying for panels you don’t need. If you can pull a usage report directly from your utility’s online portal, even better, since it typically shows monthly kWh consumption in a format any consultant can use immediately.

If you have recently added a major electricity load, such as an EV, a pool pump, or a home addition, mention it up front. Your last twelve months of billing history won’t reflect that new usage, and a consultant needs to account for it manually rather than sizing your system off outdated numbers.

Basic Roof and Property Details

Have your roof’s approximate age, material, and any known shading sources (trees, chimneys, neighboring structures) ready to mention. You do not need to measure anything yourself. Most consultants use satellite imagery for the initial system design, but flagging a roof replacement you are planning or shading you already know about saves a wasted appointment.

It’s also worth noting your roof’s general condition, even roughly. A roof with fewer than five years of remaining life is usually better replaced before installation rather than after, since removing and reinstalling panels for a later roof job adds cost. Mentioning this upfront lets a consultant flag it early instead of discovering it mid-project.

What a Real Estimate Appointment Should Cover

The Difference Between a Quick Call and a Full Consultation

A first contact is usually a short phone call, ten to fifteen minutes, to confirm your address, bill range, and timeline. The real estimate happens afterward, when a consultant reviews satellite imagery of your roof, models your usage against your utility’s current rate plan, and builds a system size specific to your home. If you only get a number from the short call, you are looking at a rough range, not a real estimate, and it may look different from how solar estimates might differ online.

Financing Options Should Be Explained Clearly

A thorough estimate walks through cash purchase, loan, and lease or PPA options side by side, with the real payback period and monthly numbers for each, not just the option that looks best on paper. Since the federal residential tax credit expired for direct purchases at the end of 2025, ask specifically how each financing path accounts for that change. Leases and PPAs can still access a separate commercial credit through 2027, which providers typically pass through as a lower monthly rate.

Ask what happens to financing if you sell your home before the system is paid off. A cash purchase or paid-off loan simply adds home value with no complications. A lease or PPA, on the other hand, usually requires the buyer to qualify to assume the agreement, which can slow down a sale. A consultant who raises this proactively, rather than waiting for you to ask, is being straightforward about the tradeoffs.

Questions to Ask During Your Estimate

Ask About Pricing Per Watt and What’s Included

Request the price broken down per watt, and ask what it includes: permitting, inspection, monitoring software, and any roof work. A consultant who can explain what solar panels actually cost in California in plain terms, including where their price falls relative to market averages, is giving you a comparable number. Vague, all-in totals without a breakdown are harder to compare across quotes.

It also helps to ask exactly what panel and inverter brand and wattage are being quoted, not just the total system size in kilowatts. Two “8 kW systems” built from different panel counts and wattages can carry very different price tags, and a consultant who can’t name the specific hardware in your quote is a sign to ask more questions before signing anything.

Ask Who Handles Warranty Claims

Find out whether the panel warranty, workmanship warranty, and performance guarantee come from the same company or three different ones. Multi-party warranties often mean finger-pointing if something fails years later, since the panel manufacturer, the installer, and the financing company can each point to one another when a claim comes up. A single company backing panels, labor, and performance under one 25-year warranty is a meaningfully simpler position to be in, since there’s exactly one number to call if anything goes wrong.

What Sets a US Power Estimate Apart

Factory Direct Pricing Shown Up Front

As an authorized Qcells sales partner with direct factory access, US Power estimates reflect wholesale pricing from the start rather than a padded number designed to leave negotiating room. You should never have to ask for a “real” discount after your first quote. If you can see how the estimate process works in Pasadena, the same transparent structure applies across every market US Power serves.

One Point of Contact From Estimate to Install

Every project includes a dedicated project coordinator who manages the estimate, permitting, installation, and utility interconnection under one roof. That means the person who gave you your numbers is accountable for whether they hold up, not a sales rep who disappears once the contract is signed.

What Changes by State: CA, TX, FL, and IL

Permitting and Timeline Differences

California estimates typically factor in NEM 3.0 export rates and battery storage as close to standard, since exported solar energy is credited at a fraction of the retail rate under current rules. Texas estimates vary more by utility and municipality, since permitting requirements and net metering policies differ by city and provider rather than following one statewide standard. Florida estimates need to account for wind-load and hurricane-rated mounting hardware, which can affect both cost and installation timeline, especially in coastal counties. Illinois estimates should reflect the state’s specific net metering credits and any utility rebate programs currently active, which can shift the payback math noticeably compared to a generic national estimate. A consultant unfamiliar with your state’s specifics is more likely to hand you a generic number built on assumptions that don’t hold up locally.

What Stays Consistent Across US Power’s Service Area

Regardless of state, US Power’s full service areas all get the same estimate structure: a documented consultation, satellite-based system design, transparent financing comparison, and a single warranty. Only the local rates, incentives, and permitting timeline change.

Walk Into Your Estimate Prepared

A good solar estimate should feel like a clear conversation, not a sales pitch you have to decode. Gather your utility bill, know your roof basics, and ask direct questions about pricing, warranty, and financing. The homeowners who get the most useful numbers are the ones who show up ready to ask.

Frequently Asked Questions About Solar Estimates

How long does a solar estimate appointment take?

An initial phone call runs ten to fifteen minutes and mainly confirms your address, bill range, and timeline. If you move forward, a full consultation, either virtual or on-site, typically takes thirty to forty-five minutes to walk through system design, pricing, and financing options in detail, with time built in for your questions.

What happens after I get my estimate?

Once you approve a proposal, the same team moves into US Power’s installation process, covering permitting, utility interconnection, and installation, which usually takes three to four weeks from approval to a completed, inspected system. Most homes are physically installed within one to two days, with the surrounding weeks covering permitting and utility paperwork.

Do I need to be home for the estimate?

Not for the initial design phase. Satellite imagery and your submitted utility data cover most of what’s needed remotely. A site visit is typically only required if your roof needs a closer physical inspection before installation, such as verifying its condition for mounting hardware, and that visit is usually scheduled separately after you’ve approved a proposal.