550W Bifacial Solar Panel
Solar Panel
550 W mono PERC bifacial solar panel with 21.68% module efficiency. 12-year product / 30-year power warranty.
Normalized price
$0.35 per watt
$192 listed price
Methodology: lowest in-stock merchant price · normalized to nameplate
tight roof spaces wanting maximum watts/m²
The data
Specifications
Electrical
| Wattage (Pmax) | 550 W |
|---|---|
| Module efficiency (STC) | 21.68% |
| Cell type | PERC |
| Bifacial | Yes |
| Bifacial gain | +25% |
| Open-circuit voltage (Voc) | 46.9 V |
| Short-circuit current (Isc) | 11.22 A |
| Voltage at Pmax (Vmp) | 38.9 V |
| Current at Pmax (Imp) | 10.56 A |
Construction
| Front glass | 2.0mm+2.0mm high transmission AR coated heat strengthened glass |
|---|---|
| Output cable | 4 mm² |
| Cable length | 350 mm |
| Connector type | MC4 |
| Dimensions | 2278 × 1134 × 30 mm |
| Weight | 31.5 kg |
Warranty & compliance
| Product warranty | 12 years |
|---|---|
| Performance warranty | 30 years |
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Editorial
Best for, watch out for
Best for
- tight roof spaces wanting maximum watts/m²
- ground-mount or albedo-friendly install with bifacial gain
Watch out for
- Product warranty is only 12 years — shorter than premium tier-1 panels
The market
Price history
Price history
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The shortlist
Three alternatives we'd consider
Common questions
What people ask about the 550W Bifacial Solar Panel
Will the ZNShine 550W Bifacial Solar Panel qualify for the federal solar tax credit?
FEOC compliance for ZNShine 550W Bifacial 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?
ZNShine 550W Bifacial Solar Panel carries a 12-year product warranty (defects in materials and workmanship) and a 30-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?
Panel cells in summer regularly run 25–35°C above ambient air temperature, and every panel loses some output as temperature rises. Panels with Pmax temperature coefficients closer to -0.25%/°C lose less power in heat than panels at -0.35%/°C — meaningful in hot climates like TX or AZ.
What's the realistic bifacial gain on a residential roof?
ZNShine 550W Bifacial Solar Panel is bifacial with a rated gain up to +25%. Realistic gain on a residential roof is much lower than the spec — typically 2–5% — because most roofs sit close to the rafters with dark underlayment that absorbs (rather than reflects) light. Bifacial pays back better on ground mounts over white gravel or on light-colored roofing. On a standard composition-shingle roof, treat the bifacial gain as a small bonus, not a planning assumption.
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