450W Monocrystalline Solar Panel
Solar Panel
450 W TOPCon monofacial solar panel with 23.05% module efficiency.
Normalized price
$0.70 per watt
$315 listed price
Methodology: lowest in-stock merchant price · normalized to nameplate
tight roof spaces wanting maximum watts/m²
The data
Specifications
Electrical
| Wattage (Pmax) | 450 W |
|---|---|
| Module efficiency (STC) | 23.05% |
| Cell type | TOPCON |
| Bifacial | No |
| Open-circuit voltage (Voc) | 39.7 V |
| Short-circuit current (Isc) | 13.89 A |
| Voltage at Pmax (Vmp) | 34.18 V |
| Current at Pmax (Imp) | 13.17 A |
Construction
| Front glass | 3.2mm AR coating tempered glass, low iron |
|---|---|
| Frame | Anodized aluminium alloy |
| Output cable | 4 mm² |
| Cable length | 1350 mm |
| Connector type | MC4 |
| Dimensions | 1722 × 1134 × 35 mm |
| Weight | 21.5 kg |
Environmental
| Temp. coefficient (Pmax) | -0.29 %/°C |
|---|---|
| Temp. coefficient (Voc) | -0.25 %/°C |
| Temp. coefficient (Isc) | 0.046 %/°C |
| Mechanical load | 5400 Pa front / 5400 Pa back |
| Operating temp. | -40°C to 85°C |
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Best for
- tight roof spaces wanting maximum watts/m²
The market
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The shortlist
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Common questions
What people ask about the 450W Monocrystalline Solar Panel
Will the Sirius PV 450W Monocrystalline Solar Panel qualify for the federal solar tax credit?
FEOC compliance for Sirius PV 450W Monocrystalline 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?
Warranty terms for this specific module are not yet in our verified data set. Always confirm both the product (defects/workmanship) and the linear performance terms with the installer or the published datasheet before purchase.
How does the temperature coefficient affect real-world output?
Sirius PV 450W Monocrystalline Solar Panel has a Pmax temp coefficient of -0.29%/°C. In summer, panel cells regularly run 25–35°C above ambient — so a 35°C cell at peak sun will lose roughly 10.1% 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 — Sirius PV 450W Monocrystalline 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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