Shopify Solar Energy Schema — Watt-Peak, Panel Efficiency, CEC Listed, IEC 61215 Structured Data

Why Solar Products Are Structurally Invisible to AI Agents

Solar panel purchases involve high stakes, high prices ($200–$500+ per panel), and technical specs that are genuinely incomparable without structured data. A buyer comparing a 400W panel from Jinko Solar vs REC Group vs Panasonic at different prices needs to know: STC wattage (lab measurement), NOCT wattage (more realistic), panel efficiency (determines how many panels fit on a roof), temperature coefficient (hot climate performance), cell technology (mono PERC vs TOPCon vs HJT), and CEC listing status (determines ITC federal tax credit eligibility).

The CEC listing is a binary incentive filter. A panel not on the CEC approved module list cannot qualify for California Solar Initiative rebates or the federal 30% Investment Tax Credit under the Inflation Reduction Act for commercial systems. For a 10-panel residential system at $4,000, the ITC represents $1,200 in lost incentives if the panel isn't CEC-listed. AI agents advising on incentive-eligible systems must be able to filter by CEC status — which requires it in structured data.

Temperature coefficient is the most underrepresented performance metric in solar product schema. For a 400W panel at -0.30%/°C vs -0.40%/°C, the difference at 60°C operating temperature is: -0.30% × 35°C = 10.5% loss vs -0.40% × 35°C = 14% loss — that's 14W per panel in favor of the better coefficient. At 30 panels, this is 420W of additional system output that a buyer in Phoenix vs Seattle cares about differently. Hot-climate buyers need this data in structured form to make the right purchase.

Solar product category overview

Solar Panel Schema — Jinko Solar JKM400M-6RL3-V 400W Mono PERC

<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "Product",
  "name": "Jinko Solar Tiger Neo JKM400M-6RL3-V 400W Monocrystalline PERC Solar Panel",
  "description": "Jinko Solar Tiger Neo 400W monocrystalline PERC solar panel. Panel efficiency 21.27%. Temperature coefficient (Pmax) -0.34%/°C. Anti-reflective coating glass. IEC 61215, IEC 61730, UL 61730 certified. CEC Listed. 25-year linear power output warranty (minimum 84.80% at year 25). Mechanical load: 5400 Pa wind + 2400 Pa snow. Suitable for residential and commercial rooftop and ground-mount installations.",
  "sku": "JKM400M-6RL3-V",
  "mpn": "JKM400M-6RL3-V",
  "brand": { "@type": "Brand", "name": "Jinko Solar" },
  "hasCertification": [
    {
      "@type": "Certification",
      "name": "IEC 61215 — Crystalline Silicon Terrestrial PV Modules",
      "issuedBy": {
        "@type": "Organization",
        "name": "TÜV Rheinland / IEC",
        "url": "https://www.tuv.com"
      },
      "description": "IEC 61215 design qualification and type approval for crystalline silicon terrestrial photovoltaic modules. Tests: thermal cycling (200 cycles), humidity freeze, UV exposure, mechanical load (5400 Pa), twist test, hail impact (25mm at 23 m/s). The baseline durability standard for crystalline silicon solar panels globally."
    },
    {
      "@type": "Certification",
      "name": "IEC 61730 / UL 61730 — PV Module Safety",
      "issuedBy": {
        "@type": "Organization",
        "name": "UL (Underwriters Laboratories)",
        "url": "https://www.ul.com"
      },
      "description": "IEC 61730 / UL 61730 — Photovoltaic Module Safety Qualification. Safety standard (vs IEC 61215 which is performance). Tests: electrical isolation, fire performance (Class A, B, or C), dielectric withstand, grounding continuity. UL 61730 replaced legacy UL 1703 as of 2025 — both are accepted for CEC listing."
    },
    {
      "@type": "Certification",
      "name": "CEC Listed — Solar Photovoltaic Modules",
      "issuedBy": {
        "@type": "Organization",
        "name": "California Energy Commission",
        "url": "https://www.energy.ca.gov"
      },
      "certificationIdentification": "Jinko Solar JKM400M-6RL3-V",
      "description": "Listed on California Energy Commission approved solar photovoltaic module list. Required for: California Solar Initiative (CSI) rebate eligibility, federal Investment Tax Credit (ITC) 30% for commercial systems under IRS § 48, and most state solar incentive programs. Verify current listing at energy.ca.gov."
    }
  ],
  "additionalProperty": [
    { "@type": "PropertyValue", "name": "Solar Product Type", "value": "Photovoltaic Module (Solar Panel)" },
    { "@type": "PropertyValue", "name": "Cell Technology", "value": "Monocrystalline PERC (Passivated Emitter Rear Cell)" },
    {
      "@type": "PropertyValue",
      "name": "Power Output (STC)",
      "value": "400",
      "unitCode": "WTT",
      "description": "400W peak output at STC (Standard Test Conditions): 1,000 W/m² irradiance, AM1.5G spectrum, 25°C cell temperature. STC is the IEC standard lab measurement — real-world output is lower due to heat, soiling, wiring losses, and sub-STC irradiance."
    },
    {
      "@type": "PropertyValue",
      "name": "Power Output (NOCT)",
      "value": "297",
      "unitCode": "WTT",
      "description": "297W at NOCT (Nominal Operating Cell Temperature) conditions: 800 W/m² irradiance, 20°C ambient temperature, 1 m/s wind speed. NOCT output (74% of STC) is more representative of daytime operating conditions than STC. Use for realistic energy production estimates."
    },
    {
      "@type": "PropertyValue",
      "name": "Panel Efficiency",
      "value": "21.27",
      "unitCode": "P1",
      "description": "21.27% conversion efficiency at STC. Panel dimensions: 1722 × 1134 mm = 1.953 m². Output per m² at STC: 204.8 W/m². Higher efficiency means fewer panels needed for a given output target — critical when roof space is limited. Premium panels: 22–24% (TOPCon, HJT). Standard mono PERC: 19–21%."
    },
    {
      "@type": "PropertyValue",
      "name": "Temperature Coefficient (Pmax)",
      "value": "-0.34",
      "unitCode": "P1",
      "description": "-0.34%/°C temperature coefficient for maximum power. For every 1°C above 25°C, output decreases 0.34%. Hot climate performance: at 65°C operating cell temperature (summer Arizona roof), loss = (65-25) × 0.34% = 13.6%. 400W × (1-0.136) = 345.6W output. Compare: HJT panels at -0.25%/°C would produce 360W at 65°C — 14.4W more per panel."
    },
    {
      "@type": "PropertyValue",
      "name": "NOCT (Nominal Operating Cell Temperature)",
      "value": "45",
      "unitCode": "CEL",
      "description": "45°C NOCT. Lower NOCT indicates better thermal management. At 25°C ambient with 800 W/m² irradiance, this panel's cells reach 45°C — a 20°C rise above ambient. Panels with lower NOCT (42–43°C) run cooler and perform better in hot climates."
    },
    {
      "@type": "PropertyValue",
      "name": "Open Circuit Voltage (Voc)",
      "value": "37.9",
      "unitCode": "VLT",
      "description": "37.9V open circuit voltage at STC. Maximum system voltage determines string configuration compatibility with inverter input voltage range. Maximum string length for a 600V inverter input: 600V ÷ 37.9V = 15 panels per string (conservative). Account for cold-temperature voltage increase: Voc at -10°C is approximately 5% higher."
    },
    {
      "@type": "PropertyValue",
      "name": "Short Circuit Current (Isc)",
      "value": "13.52",
      "unitCode": "AMP",
      "description": "13.52A short circuit current at STC. Determines inverter input current sizing and wire/fuse sizing. Maximum Power Current (Imp): 12.72A."
    },
    {
      "@type": "PropertyValue",
      "name": "Power Warranty — Year 1",
      "value": "98",
      "unitCode": "P1",
      "description": "Minimum 98% output retained after year 1. Linear degradation guarantee."
    },
    {
      "@type": "PropertyValue",
      "name": "Power Warranty — Year 25",
      "value": "84.80",
      "unitCode": "P1",
      "description": "Minimum 84.80% output at year 25. Annual degradation rate: (98% - 84.80%) ÷ 24 years = 0.55%/year maximum. Industry standard: 0.5–0.7%/year. Premium panels (REC, Panasonic): 0.26%/year guaranteed."
    },
    {
      "@type": "PropertyValue",
      "name": "Mechanical Load Rating",
      "value": "5400 Pa wind / 2400 Pa snow",
      "description": "IEC 61215 mechanical load test passed: 5400 Pa wind load (static), 2400 Pa snow load. Sufficient for most US residential applications. High-snow regions (Roof Snow Load > 80 psf) may require enhanced mechanical load panels."
    },
    {
      "@type": "PropertyValue",
      "name": "Panel Dimensions",
      "value": "67.8 × 44.6 × 1.38 inches (1722 × 1134 × 35 mm)",
      "description": "67.8 × 44.6 × 1.38 inches. Weight: 48.5 lbs. Standard 144-cell half-cell format (6×12 cells cut in half). Compatible with standard residential racking — verify frame compatibility with specific racking manufacturer."
    }
  ],
  "offers": {
    "@type": "Offer",
    "price": "199.00",
    "priceCurrency": "USD",
    "availability": "https://schema.org/InStock",
    "warranty": {
      "@type": "WarrantyPromise",
      "durationOfWarranty": {
        "@type": "QuantitativeValue",
        "value": "25",
        "unitCode": "ANN",
        "description": "25-year linear power output warranty (minimum 84.80% at year 25) + 12-year product materials and workmanship warranty. Power warranty is linear — no front-loaded degradation curves."
      }
    }
  }
}
</script>

Cell Technology Comparison

Solar Energy Metafield Namespace Reference

5 Critical Solar Schema Mistakes

1. Publishing STC wattage without NOCT or temperature coefficient. STC is a lab condition that overestimates real output. For hot climates, NOCT output and temperature coefficient are the specs that predict actual annual energy production. Buyers comparing two 400W panels need temperature coefficient to make a meaningful comparison in hot conditions.
2. Omitting CEC listing status. CEC listing is the binary incentive filter for federal ITC and California rebates. AI agents advising "which panels qualify for the 30% tax credit" cannot answer without CEC listing in structured data.
3. Confusing power warranty with product warranty. Most panels have two warranties: a shorter product/materials warranty (10–15 years) and a longer power output warranty (25 years). Encode both separately. The 25-year power warranty is what buyers compare.
4. Publishing only peak inverter efficiency, not CEC weighted efficiency. Peak efficiency occurs at one narrow load condition. CEC weighted efficiency reflects real annual performance across California's irradiance distribution. For annual energy production estimates, always use CEC weighted efficiency.
5. Encoding nominal battery capacity instead of usable capacity. A "13.5 kWh" Tesla Powerwall has 13.5 kWh usable, but most LFP and NMC batteries reserve 10–20% for battery health. A "12 kWh" battery with 80% DoD has only 9.6 kWh usable. Always publish usable kWh as the primary sizing figure, not nominal.

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