What a thorough online quote should show
A reliable quote should give more than a single dollar figure. Look for: - System size in kilowatts (kW) and an estimated annual production in kWh - A clear equipment list (panel brand/model, inverter type) — not just “high-efficiency panels” - A line-item cost breakdown (equipment, labor, permits, interconnection fees, taxes, incentives) - Any assumptions used to estimate production (panel tilt, orientation, shading) - What’s included on-site: roof work, mounting hardware, electrical upgrades - Timeline for design, permit approval, and installation - How performance will be measured and monitored - Which warranties are offered and who stands behind them (manufacturer vs installer). If an online estimate is missing most of these items, treat it as a ballpark starting point rather than a final offer.
Key numbers and tradeoffs to compare
Don’t judge quotes solely by the bottom line. Compare apples to apples by checking: - Cost per watt: a quick but incomplete way to compare price; it doesn’t capture production quality or equipment differences - Estimated annual production (kWh): this tells you how much energy the system is likely to deliver for your bills - Percentage of your electricity the system is expected to cover — useful for comparing system sizing choices - Equipment details: panel efficiency, inverter type (string, microinverters, or power optimizers) and battery inclusion if any - Financing assumptions: cash, loan, lease, or PPA all change who benefits and what you pay monthly - Installer scope: who handles permitting, inspections, interconnection, and incentive paperwork. Remember: national providers such as Sunrun, Tesla Energy Solar, Palmetto Solar, and Sunnova may show up in online comparisons, but each company’s process and contract structure can differ. Production estimates and cost depend heavily on your roof, local weather, and utility rates.
Red flags and common tradeoffs
Watch for these warning signs: - A very low quote with vague equipment or no site visit — it may not reflect real costs for your roof - Missing permit or interconnection fees - No production estimate or one that lacks clear assumptions - Pressure to sign quickly or incentives that sound conditional Tradeoffs you’ll encounter: - Higher-efficiency panels can produce more where roof space is limited but cost more per watt - Microinverters or power optimizers perform better with shading but raise equipment costs - Longer lead times may come with lower prices; that affects when you’ll start seeing benefits - Older roofs may need replacement before installation; quotes that ignore roof condition often change after inspection. Always balance price against likely production, equipment quality, and the installer’s reputation.
How to get better online quotes before you request them
Make online quotes more meaningful by preparing a few items first: - Upload a recent utility bill so quotes can use your actual usage and rates - Provide your address and clear roof photos or a satellite view so companies can check orientation and shading - Ask for a written production estimate with the assumptions used - Request a full cost breakdown and a timeline for permits and installation - Ask which incentives, tax credits, or local rebates the installer will handle and whether paperwork is included - Compare at least three bids: include a local installer and larger providers like Sunrun, Tesla Energy Solar, Palmetto Solar, or Sunnova when available - Ask each company to confirm whether a site visit is required before final pricing. After you get estimates, line up the same metrics (cost per watt, expected kWh, percent of bill covered, equipment make/model, and warranty parties) to make direct comparisons easier.