LONGi Hi-MO X6 Max 470W Specifications & Review
The Hi-MO X6 Max delivers 470W in a mid-size format with N-type TOPCon technology, bridging the gap between compact and large panels.
What Makes the LONGi Hi-MO X6 Max 470W Different
The LONGi Hi-MO X6 Max 470W leverages LONGi's position as the world's largest solar panel manufacturer to deliver cutting-edge TOPCon N-type technology at 470W in a compact residential form factor. LONGi pioneered monocrystalline silicon production at scale — they produce more solar-grade silicon wafers than any other company on Earth — and this vertical integration translates to tight quality control on every cell in the 120-cell Hi-MO X6 Max 470W. The 22.3% module efficiency places it competitively within the N-type residential segment, while the -0.29%/°C temperature coefficient means less power loss in hot weather compared to PERC alternatives (-0.34%/°C). The panel's 1762×1134mm footprint (2.00 m²) fits standard residential racking, and at 23.5 kg it stays within the weight limits of most residential mounting systems. LONGi's bankability as a Bloomberg Tier 1 manufacturer and their 15-year product / 30-year performance warranty provide long-term confidence.
Key Specifications
| Brand | LONGi |
| Model | LONGi Hi-MO X6 Max 470W |
| Power Output | 470W |
| Efficiency | 22.3% |
| Power Density | 21.9 W/sq ft |
| Cell Type | TOPCon N-type |
| Cell Count | 120 cells |
| Dimensions | 1762 x 1134 x 30 mm |
| Weight | 23.5 kg |
| Open Circuit Voltage (Voc) | 44.5V |
| Max Power Voltage (Vmp) | 37.5V |
| Short Circuit Current (Isc) | 13.54A |
| Max Power Current (Imp) | 12.53A |
| Temp Coefficient (Pmax) | -0.29%/°C |
| Product Warranty | 15 years |
| Performance Warranty | 30 years |
| First Year Degradation | 1% |
| Annual Degradation | 0.4% |
| Country of Manufacture | China |
| Certifications | IEC 61215, IEC 61730, UL 1703 |
| Panel Type | Bifacial |
| Snow Load | 5400 Pa (112.8 psf) — Heavy Snow Rated |
| Wind Load | 2400 Pa (50.1 psf) |
Pros & Cons
Pros
- ✓ Mid-size versatility
- ✓ N-type TOPCon efficiency
- ✓ Good power-to-size ratio
- ✓ LONGi reliability
Cons
- ✗ Mid-range pricing
- ✗ Not the highest output
- ✗ Standard warranty
Best For
Medium-sized residential roofs wanting a balance of size and N-type performance.
Is the LONGi Hi-MO X6 Max 470W Worth It?
The LONGi Hi-MO X6 Max 470W delivers 470W of power at 22.3% 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 Hi-MO X6 Max 470W comes with a solid 15-year product warranty and a 30-year performance guarantee. The industry standard for product warranties ranges from 12 to 25 years, so this panel offers solid coverage that meets or exceeds the industry midpoint. At the end of 30 years, the panel is guaranteed to still produce approximately 87.4% of its rated output, with first-year degradation of 1% and just 0.4% per year after that.
Pricing varies by region and installer, but the Hi-MO X6 Max 470W's combination of 22.3% efficiency and 15-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 -0.29%/°C is excellent. This is better than the typical range of -0.30% to -0.40%/°C, meaning the Hi-MO X6 Max 470W retains more output on scorching summer days, a significant advantage in states like Arizona, Texas, and Florida. Overall, the LONGi Hi-MO X6 Max 470W represents a strong value proposition for most residential installations.
Real-World Performance
In real-world conditions, the LONGi Hi-MO X6 Max 470W delivers consistent energy production shaped by its -0.29%/°C temperature coefficient. On a hot summer day when panel surface temperatures reach 65°C (40°C above STC), the Hi-MO X6 Max 470W loses approximately 11.6% of rated output — better than PERC panels that lose 13-14% under the same conditions. Over a full year in a typical US location, expect annual specific yield of 1,500-1,800 kWh per kW installed, depending on location, tilt, and shading. The 1% first-year degradation settles into 0.4% annual degradation thereafter; after 25 years the Hi-MO X6 Max 470W should still produce approximately 89.4% of its original rating. In bifacial installations on light-colored ground surfaces or trackers, expect 5-15% additional energy beyond the rated front-side output. 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 LONGi Hi-MO X6 Max 470W?
System Design Tips
For string inverter systems, the LONGi Hi-MO X6 Max 470W's Voc of 44.5V allows up to 13 panels per string on a 600V inverter, or 10 panels per string on 480V systems. The Isc of 13.54A 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 470W output well with a DC/AC ratio of 1.3-1.2. 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 22-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 LONGi Hi-MO X6 Max 470W is sold through residential solar distributors and installers. LONGi pricing varies by distributor and order volume. For a 22-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 $31,020-$36,190 before the 30% federal ITC. After ITC: approximately $21,714-$25,333.
How the LONGi Hi-MO X6 Max 470W Compares
| Model | Wattage | Efficiency | W/sq ft | Warranty | Snow Load | Cell Type |
|---|---|---|---|---|---|---|
| LONGi Hi-MO X6 Max 470W (this panel) | 470W | 22.3% | 21.9 | 15 yrs | 5400 Pa | TOPCon N-type |
| REC Alpha Pure-RX 470W | 470W | 22.6% | 21.0 | 25 yrs | 5400 Pa | HJT (Heterojunction) |
| Maxeon Maxeon 7 470W | 470W | 22.8% | 22.6 | 40 yrs | 5400 Pa | IBC (Interdigitated Back Contact) |
| JinkoSolar Tiger Neo 475W | 475W | 22.6% | 22.1 | 15 yrs | 5400 Pa | TOPCon N-type |
Compare This Panel
Installation & Compatibility
System Voltage & String Sizing
- Open Circuit Voltage (Voc)
- 44.5V
- Max Power Voltage (Vmp)
- 37.5V
- Short Circuit Current (Isc)
- 13.54A
- Max Power Current (Imp)
- 12.53A
- Max Panels per String (600V)
- 13 panels
Based on NEC 600V residential limit. Actual string sizing should account for cold-temperature Voc rise. Consult your installer or use a string sizing tool for your specific location.
Mounting Requirements
- Dimensions
- 1762 x 1134 x 30 mm
- Weight
- 23.5 kg (51.8 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 or complex layouts. Match to panels rated 470W+.
- - String Inverters: Cost-effective for unshaded arrays. Ensure MPPT range covers 37.5V.
- - Hybrid Inverters: Best if adding battery storage. Check DC input specs match panel Voc of 44.5V.
Frequently Asked Questions
How efficient is the LONGi Hi-MO X6 Max 470W compared to other panels?
The Hi-MO X6 Max 470W achieves 22.3% module efficiency, which is above average for N-type residential panels. N-type TOPCon panels in our database range from 21.5% to 23.0%, placing the Hi-MO X6 Max 470W in the upper half of that range. Higher efficiency means more watts per square foot of roof space.
What is the warranty on the LONGi Hi-MO X6 Max 470W?
LONGi provides a 15-year product warranty covering manufacturing defects and a 30-year performance warranty guaranteeing output levels. The performance warranty typically starts at 99% after year 1 and degrades by 0.4% per year, guaranteeing approximately 89.4% output at year 25. The product warranty is in line with industry standards.
How many LONGi Hi-MO X6 Max 470W panels do I need for my home?
For a typical US home using 10,000 kWh per year, you need approximately 22 panels (10.3 kW system) assuming 4-5 peak sun hours per day. This varies significantly by location — homes in Arizona may need 19-21 panels while homes in the Pacific Northwest may need 24-26 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 LONGi Hi-MO X6 Max 470W?
The LONGi Hi-MO X6 Max 470W achieves 22.3% module efficiency using TOPCon N-type cell technology. This is above the industry average for residential solar panels in 2026.
What warranty does the LONGi Hi-MO X6 Max 470W include?
It comes with a 15-year product warranty and a 30-year performance warranty guaranteeing output at approximately 87.4% of rated power at the end of the warranty period.
How does the LONGi Hi-MO X6 Max 470W perform in hot weather?
With a temperature coefficient of -0.29%/°C, the Hi-MO X6 Max 470W handles heat well with minimal power loss. Every degree above 25°C reduces output by 0.29%.
What size system can I build with the LONGi Hi-MO X6 Max 470W?
At 470W per panel, you would need approximately 18 panels for an 8 kW system or 22 panels for a 10 kW system. Each panel measures 1762 x 1134 mm (21.5 sq ft).
What inverter is best with the LONGi Hi-MO X6 Max 470W?
The LONGi Hi-MO X6 Max 470W works well with both string inverters and microinverters. For string inverters, choose one with a maximum input voltage above 44.5V and an MPPT voltage range that covers 37.5V. Microinverters rated for 470W+ 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 LONGi Hi-MO X6 Max 470W last?
The LONGi Hi-MO X6 Max 470W is built to last well beyond its 30-year performance warranty. With first-year degradation of 1% and annual degradation of 0.4% thereafter, the panel will still produce approximately 87.4% of its rated power after 30 years. Most modern solar panels continue generating useful power for 30-40 years, though output gradually decreases over time.
Is the LONGi Hi-MO X6 Max 470W good for Arizona and other sunny states?
Yes, the LONGi Hi-MO X6 Max 470W is an excellent choice for hot, sunny states like Arizona, Nevada, and Texas. Its temperature coefficient of -0.29%/°C is better than the industry average of -0.35%/°C, meaning it retains more power output on hot days. Higher sun exposure in these states means more total energy production throughout the year, often offsetting any heat-related losses.
Is the LONGi Hi-MO X6 Max 470W worth the money?
The LONGi Hi-MO X6 Max 470W delivers 22.3% efficiency, which is above the industry average of ~21%. Combined with a solid 15-year product warranty and 30-year performance guarantee, it offers strong value for homeowners seeking reliable solar generation.
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Last updated: February 2026