Tongwei THN-PE14M10 450W
Tongwei's THN-PE14M10 delivers 450W using proven PERC technology at a very competitive price point.
⚠️ Specs Pending Verification · status: product not exists
Same as THN-EP08M10: Tongwei uses TWMNH-48HD/HC etc. for 430-450W class. "THN-PE14M10" is not a real Tongwei designation.
Last review attempt: 2026-05-25 · See our methodology
At a glance
Value comparison (same class)
How the Tongwei THN-PE14M10 450W stacks up against other panels in the 450W±100W range.
| Model | Score | Efficiency | $/W | Warranty | Value |
|---|---|---|---|---|---|
| ★ THIS — Tongwei THN-PE14M10 450W | 73 | 21.5% | — | 12 yr | Average |
| Trina Solar Vertex S+ NEG9RC 450W | 92 | 22.5% | — | 15 yr | Excellent |
| Phono Solar TwinPlus 450W | 89 | 21.8% | — | 15 yr | Good |
| Renogy 450W Bifacial Mono Solar Panel | 88 | 22.8% | — | 12 yr | Good |
Where this panel works best
High snow load rating (5400 Pa) makes this panel well-suited for northern states with heavy winter accumulation.
Click a state for the full local solar buying guide (incentives, payback, top installers).
Pricing
Public pricing data is limited for the Tongwei THN-PE14M10 450W. Request multiple installer quotes to benchmark per-watt cost in your area.
Live historical pricing trends coming in v0.3 (integrating manufacturer MSRP + reseller data).
Recent news about Tongwei
Latest manufacturer announcements, shipment updates, and product roadmap from public sources:
Best for these scenarios
- ✓ Roof area: 258 – 581 ft² (12–27 panels for a 5–12 kW system)
- ✓ Monthly usage: 729 – 1,640 kWh/month (assuming 4.5 peak-sun hrs/day average US)
- ✓ Best for: Value-focused projects seeking affordable panels from a major cell producer.
- ✗ NOT ideal for: partially shaded roofs without panel-level optimization (microinverters/optimizers recommended)
Full Datasheet — every parameter ▾
Key Specifications
| Brand | Tongwei |
| Model | Tongwei THN-PE14M10 450W |
| Power Output | 450W |
| Efficiency | 21.5% |
| Power Density | 20.9 W/sq ft |
| Cell Type | PERC Mono |
| Cell Count | 120 cells |
| Dimensions | 1762 x 1134 x 30 mm |
| Weight | 23 kg |
| Open Circuit Voltage (Voc) | 43.5V |
| Max Power Voltage (Vmp) | 36.5V |
| Short Circuit Current (Isc) | 13.32A |
| Max Power Current (Imp) | 12.33A |
| Temp Coefficient (Pmax) | -0.34%/°C |
| Product Warranty | 12 years |
| Performance Warranty | 25 years |
| First Year Degradation | 1.5% |
| Annual Degradation | 0.5% |
| Country of Manufacture | China |
| Certifications | IEC 61215, IEC 61730, UL 1703 |
| Snow Load | 5400 Pa (112.8 psf) — Heavy Snow Rated |
| Wind Load | 2400 Pa (50.1 psf) |
Pros & Cons
Pros
- ✓ Very competitive pricing
- ✓ Good output for size
- ✓ Strong cell technology
- ✓ Growing brand
Cons
- ✗ Less known outside China
- ✗ Standard warranty
- ✗ Limited US distribution
Installation & Compatibility
System Voltage & String Sizing
- Open Circuit Voltage (Voc)
- 43.5V
- Max Power Voltage (Vmp)
- 36.5V
- Short Circuit Current (Isc)
- 13.32A
- Max Power Current (Imp)
- 12.33A
- Max Panels per String (600V)
- 13 panels
Based on NEC 600V residential limit. Actual string sizing should account for cold-temperature Voc rise.
Mounting Requirements
- Dimensions
- 1762 x 1134 x 30 mm
- Weight
- 23 kg (50.7 lbs)
- Area per Panel
- 21.5 sq ft
- Weight per sq ft
- 2.4 lbs/sq ft
Recommended Inverter Types
- - Microinverters: Ideal for shaded roofs. Match to panels rated 450W+.
- - String Inverters: Cost-effective for unshaded arrays. MPPT must cover 36.5V.
- - Hybrid Inverters: Best if adding battery storage. Check Voc of 43.5V.
Is the Tongwei THN-PE14M10 450W Worth It?
The Tongwei THN-PE14M10 450W delivers 450W of power at 21.5% module efficiency, which is above the current industry average of approximately 21%. This higher efficiency means you need fewer panels to reach your target system size, saving roof space and potentially reducing mounting hardware costs.
From a warranty perspective, the THN-PE14M10 450W comes with a standard 12-year product warranty and a 25-year performance guarantee. The industry standard for product warranties ranges from 12 to 25 years, so you may want to weigh this shorter warranty against the overall system cost. At the end of 25 years, the panel is guaranteed to still produce approximately 86.5% of its rated output, with first-year degradation of 1.5% and just 0.5% per year after that.
Pricing varies by region and installer, but the THN-PE14M10 450W's combination of 21.5% efficiency and 12-year warranty should be weighed against per-watt quotes from your installer. Request at least three quotes to ensure you are getting competitive pricing for this tier of panel.
For hot climates, the temperature coefficient of -0.34%/°C is good. This falls within the typical range, so you can expect reasonable performance in most climates, though premium panels with coefficients closer to -0.25%/°C will edge ahead in extreme heat. Overall, the Tongwei THN-PE14M10 450W can be a reasonable choice depending on your budget and performance requirements.
What Makes the Tongwei THN-PE14M10 450W Different
The Tongwei THN-PE14M10 450W delivers 450W at 21.5% efficiency using PERC Mono cells in a 120-cell configuration. Tongwei brings proven PERC monocrystalline technology to a compact residential form factor measuring 1762×1134mm at 23 kg. The -0.34%/°C temperature coefficient is standard for the cell technology. With a 12-year product warranty and 25-year performance guarantee, the THN-PE14M10 450W provides 1.5% first-year and 0.5% annual degradation — standard degradation rates for the technology.
Real-World Performance
In real-world conditions, the Tongwei THN-PE14M10 450W delivers consistent energy production shaped by its -0.34%/°C temperature coefficient. On a hot summer day when panel surface temperatures reach 65°C (40°C above STC), the THN-PE14M10 450W loses approximately 13.6% of rated output — typical for PERC technology. Over a full year in a typical US location, expect annual specific yield of 1,400-1,700 kWh per kW installed, depending on location, tilt, and shading. The 1.5% first-year degradation settles into 0.5% annual degradation thereafter; after 25 years the THN-PE14M10 450W should still produce approximately 86.5% of its original rating. The 120 half-cut cells provide improved shade tolerance compared to full-cell designs — when one cell is shaded, only one sub-string is affected rather than an entire string, limiting production losses to approximately one-third of the panel rather than one-half.
Who Should Buy the Tongwei THN-PE14M10 450W?
System Design Tips
For string inverter systems, the Tongwei THN-PE14M10 450W's Voc of 43.5V allows up to 13 panels per string on a 600V inverter, or 11 panels per string on 480V systems. The Isc of 13.32A is within the input range of all major residential string inverters and microinverters. For microinverter pairing, the Enphase IQ8A (366VA) or IQ8H (384VA) handles the 450W output well with a DC/AC ratio of 1.2-1.2. SolarEdge P505 optimizers pair well for optimizer-based systems. Size your inverter at 75-90% of total DC wattage for optimal clipping management — for a 23-panel array (10.3 kW DC), a 8 W AC inverter is a good match. The panel handles 5400 Pa snow load and 2400 Pa wind load.
Price Estimate
The Tongwei THN-PE14M10 450W is sold through residential solar distributors and installers. Tongwei pricing varies by distributor and order volume. For a 23-panel system (10.3 kW DC), total installed cost including panels, inverter, racking, wiring, permitting, and labor typically runs $2.50-3.50/W, or approximately $31,050-$36,225 before the 30% federal ITC. After ITC: approximately $21,735-$25,358.
Frequently Asked Questions
How efficient is the Tongwei THN-PE14M10 450W compared to other panels?
The THN-PE14M10 450W achieves 21.5% module efficiency, which is competitive for PERC residential panels. PERC panels typically range from 20.0% to 21.8%, and the THN-PE14M10 450W is near the top within that range. Higher efficiency means more watts per square foot of roof space.
What is the warranty on the Tongwei THN-PE14M10 450W?
Tongwei provides a 12-year product warranty covering manufacturing defects and a 25-year performance warranty guaranteeing output levels. The performance warranty typically starts at 98.5% after year 1 and degrades by 0.5% per year, guaranteeing approximately 86.5% output at year 25. The product warranty is in line with industry standards.
How many Tongwei THN-PE14M10 450W panels do I need for my home?
For a typical US home using 10,000 kWh per year, you need approximately 23 panels (10.3 kW system) assuming 4-5 peak sun hours per day. This varies significantly by location — homes in Arizona may need 20-22 panels while homes in the Pacific Northwest may need 25-27 panels. Your installer will calculate the exact number based on your utility bills, roof orientation, shading, and local solar resource.
What is the efficiency of the Tongwei THN-PE14M10 450W?
The Tongwei THN-PE14M10 450W achieves 21.5% module efficiency using PERC Mono cell technology. This is around the industry average for residential solar panels in 2026.
What warranty does the Tongwei THN-PE14M10 450W include?
It comes with a 12-year product warranty and a 25-year performance warranty guaranteeing output at approximately 86.5% of rated power at the end of the warranty period.
How does the Tongwei THN-PE14M10 450W perform in hot weather?
With a temperature coefficient of -0.34%/°C, the THN-PE14M10 450W experiences moderate power reduction in high temperatures. Every degree above 25°C reduces output by 0.34%.
What size system can I build with the Tongwei THN-PE14M10 450W?
At 450W per panel, you would need approximately 18 panels for an 8 kW system or 23 panels for a 10 kW system. Each panel measures 1762 x 1134 mm (21.5 sq ft).
What inverter is best with the Tongwei THN-PE14M10 450W?
The Tongwei THN-PE14M10 450W works well with both string inverters and microinverters. For string inverters, choose one with a maximum input voltage above 43.5V and an MPPT voltage range that covers 36.5V. Microinverters rated for 450W+ panels are also an excellent choice, offering panel-level monitoring and shade tolerance. Popular options include Enphase IQ8 series microinverters and SolarEdge string inverters with power optimizers.
How long will the Tongwei THN-PE14M10 450W last?
The Tongwei THN-PE14M10 450W is built to last well beyond its 25-year performance warranty. With first-year degradation of 1.5% and annual degradation of 0.5% thereafter, the panel will still produce approximately 86.5% of its rated power after 25 years. Most modern solar panels continue generating useful power for 30-40 years, though output gradually decreases over time.
Is the Tongwei THN-PE14M10 450W good for Arizona and other sunny states?
The Tongwei THN-PE14M10 450W can work in hot states like Arizona, Nevada, and Texas, though its temperature coefficient of -0.34%/°C means it will lose some output on the hottest days. Consider panels with a lower (closer to 0) temperature coefficient if you live in an area with extreme heat. Higher sun exposure in these states means more total energy production throughout the year, often offsetting any heat-related losses.
Is the Tongwei THN-PE14M10 450W worth the money?
The Tongwei THN-PE14M10 450W delivers 21.5% efficiency, which is above the industry average of ~21%. Combined with a standard 12-year product warranty and 25-year performance guarantee, it offers strong value for homeowners seeking reliable solar generation.
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Last updated: May 2026