405W Solar Panel
Solar Panel
405 W mono PERC monofacial solar panel with 20.74% module efficiency. 25-year product / 25-year power warranty.
Normalized price
$0.36 per watt
$145 listed price
Methodology: lowest in-stock merchant price · normalized to nameplate
long-hold projects (25+ year product warranty)
The data
Specifications
Electrical
| Wattage (Pmax) | 405 W |
|---|---|
| Module efficiency (STC) | 20.74% |
| Cell type | PERC |
| Bifacial | No |
| Open-circuit voltage (Voc) | 37.23 V |
| Short-circuit current (Isc) | 13.87 A |
| Voltage at Pmax (Vmp) | 31.21 V |
| Current at Pmax (Imp) | 12.98 A |
Construction
| Front glass | Single glass, 3.2mm coated tempered glass |
|---|---|
| Frame | Black, Anodized Aluminum Alloy |
| Output cable | 4 mm² |
| Cable length | 300 mm |
| Connector type | MC4-EVO2 |
| Dimensions | 1722 × 1134 × 30 mm |
| Weight | 21 kg |
Environmental
| Temp. coefficient (Pmax) | -0.335 %/°C |
|---|---|
| Temp. coefficient (Voc) | -0.265 %/°C |
| Temp. coefficient (Isc) | 0.045 %/°C |
Warranty & compliance
| Product warranty | 25 years |
|---|---|
| Performance warranty | 25 years |
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- long-hold projects (25+ year product warranty)
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The shortlist
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Common questions
What people ask about the 405W Solar Panel
Will the Lumina 405W Solar Panel qualify for the federal solar tax credit?
FEOC compliance for Lumina 405W Solar Panel hasn't been independently confirmed by us. Section 25D — the residential ITC — expired Jan 1, 2026, so for cash purchases the question is moot. For leases or TPO, ask the installer to provide manufacturer FEOC documentation before signing.
What does the warranty actually cover?
Lumina 405W Solar Panel carries a 25-year product warranty (defects in materials and workmanship) and a 25-year linear performance warranty. The product warranty matters most: panels in residential service rarely degrade past spec, but they do occasionally fail electrically. A short product warranty (under 15 years) is the bigger flag than a short performance warranty.
How does the temperature coefficient affect real-world output?
Lumina 405W Solar Panel has a Pmax temp coefficient of -0.335%/°C. In summer, panel cells regularly run 25–35°C above ambient — so a 35°C cell at peak sun will lose roughly 11.7% of nameplate power. Panels with coefficients closer to -0.25%/°C (better) lose less in heat than panels at -0.35%/°C (worse). For hot-climate installs (TX, AZ) this gap is real annual production.
Is this panel bifacial?
No — Lumina 405W Solar Panel is monofacial (front-side only). Bifacial panels capture diffuse light on the back side too, but the realistic gain on a typical residential roof is only 2–5% in practice. It's not a feature most homeowners notice the absence of.
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