The LONGi LR7-54HVB-485M is a 485W monocrystalline solar module from the Hi-MO X10 Artist series, built around LONGi's second-generation HPBC 2.0 (Hybrid Passivated Back Contact) cell technology. Because the busbars and cell interconnections sit on the rear of the cell rather than the front, the module presents a completely uninterrupted full black face — no visible gridlines, no silver busbars — making it a strong fit for roof-mounted residential installations where appearance matters as much as output.
Built on N-type TaiRay wafer material with a 0BB (zero busbar) rear structure, the module reaches a class-leading 23.8% module efficiency at its 485W rating, with Anti-Shading technology that limits power loss and localised overheating when part of the array is shaded. LONGi backs the module with a 30-year linear power warranty and a 25-year product warranty, reflecting the lower degradation characteristics of BC-cell construction.
40.40V
Open Circuit Voltage
30 Yr
Linear Power Warranty
DC1500V
Max System Voltage
Please Note
This is the single-glass, black-frame "Artist" module (LR7-54HVB series), not to be confused with the visually similar LR7-54HVH "Explorer" series, which uses a dual-glass construction and carries different weight and mechanical loading figures.
Key Features
HPBC 2.0 Back-Contact Cells
Front-face busbars and interconnects are eliminated entirely, removing the main source of shading loss and front-surface reflection found in conventional PERC or TOPCon modules — improving light capture without increasing cell area.
N-type TaiRay Wafer
N-type silicon is inherently less prone to light-induced degradation than P-type, contributing to the module's <1% first-year degradation and 0.35% per year degradation thereafter across the 30-year warranty term.
Pure Black Aesthetic
Black anodised aluminium frame paired with the busbar-free black cell surface gives a genuinely uniform all-black appearance, with no visible white backsheet lines or silver gridding — suited to street-visible residential roofs.
Anti-Shading Technology
Reduces the impact of partial shading (chimneys, aerials, nearby trees) on total string output and helps prevent the localised hotspot heating that can accelerate cell degradation in conventional shaded modules.
Lower Operating Temperature
BC-cell construction runs cooler under load than standard front-contact cells, which — combined with a Pmax temperature coefficient of -0.260%/°C — helps sustain output better on hot, high-irradiance days typical of exposed UK roofs in summer.
High Static Load Rating
Rated to 5400Pa front-side and 2400Pa rear-side static loading, with certified resistance to 25mm hailstone impact at 23m/s — suitable for exposed, high-wind, and snow-load UK installation sites.
Technical Specification
| Electrical Characteristics (STC) |
| Maximum Power (Pmax) |
485W |
| Module Efficiency |
23.8% |
| Open Circuit Voltage (Voc) |
40.40V |
| Short Circuit Current (Isc) |
15.23A |
| Voltage at Max Power (Vmp) |
33.40V |
| Current at Max Power (Imp) |
14.53A |
| Power Output Tolerance |
0 ~ +3% |
| Electrical Characteristics (NOCT) |
| Maximum Power (Pmax) |
369W |
| Open Circuit Voltage (Voc) |
38.39V |
| Short Circuit Current (Isc) |
12.24A |
| Voltage at Max Power (Vmp) |
31.74V |
| Current at Max Power (Imp) |
11.65A |
| Nominal Operating Cell Temperature |
45±2°C |
| Cell & Module Technology |
| Cell Type |
N-type TaiRay wafer, HPBC 2.0, 0BB |
| Cell Orientation / Count |
108 cells (6×18) |
| First Year Power Degradation |
<1% |
| Annual Degradation (Year 2–30) |
0.35% |
| Temperature Coefficients |
| Temperature Coefficient of Isc |
+0.050%/°C |
| Temperature Coefficient of Voc |
-0.200%/°C |
| Temperature Coefficient of Pmax |
-0.260%/°C |
| Operational Temperature Range |
-40°C to +85°C |
| Mechanical Specification |
| Dimensions (L x W x H) |
1800 x 1134 x 30mm |
| Weight |
21.6kg |
| Glass |
Single glass, 3.2mm coated tempered glass |
| Frame |
Black anodised aluminium alloy |
| Junction Box |
IP68 rated |
| Output Cable |
4mm², +400/-200mm (length can be customised) |
| Front Side Max Static Loading |
5400Pa |
| Rear Side Max Static Loading |
2400Pa |
| Hailstone Impact Resistance |
25mm hailstone at 23m/s |
| Ratings & Certification |
| Protection Class |
Class II |
| Maximum System Voltage |
DC1500V (IEC) |
| Maximum Series Fuse Rating |
25A |
| Fire Rating |
IEC Class C |
| Standards |
IEC 61215, IEC 61730, UL 61730 |
| Management Systems |
ISO 9001:2015, ISO 14001:2015, ISO 45001:2018 |
| Design Qualification |
IEC 62941 |
| Warranty |
| Product Warranty (Materials & Processing) |
25 years |
| Linear Power Output Warranty |
30 years (88.85% guaranteed at year 30) |
Available Variants
| MPN |
Rated Power (Pmax) |
Module Efficiency |
Voc |
Isc |
| LR7-54HVB-475M |
475W |
23.3% |
40.18V |
15.03A |
| LR7-54HVB-480M |
480W |
23.5% |
40.29V |
15.13A |
|
LR7-54HVB-485M (this listing) |
485W |
23.8% |
40.40V |
15.23A |
| LR7-54HVB-490M |
490W |
24.0% |
40.52V |
15.33A |
| LR7-54HVB-495M |
495W |
24.3% |
40.64V |
15.43A |
| LR7-54HVB-500M |
500W |
24.5% |
40.76V |
15.53A |
Important Safety Information
Installation must be carried out by a suitably qualified and competent installer in accordance with the current edition of the IET Wiring Regulations (BS 7671) and MCS installation standards. DC isolation and array design must respect the module's DC1500V maximum system voltage and 25A maximum series fuse rating.
Frequently Asked Questions
What does HPBC mean and how is it different from standard PERC or TOPCon panels?
HPBC stands for Hybrid Passivated Back Contact. Unlike PERC or TOPCon cells, which route busbars and metal fingers across the front of the cell, HPBC moves all electrical contacts to the rear. This removes front-surface shading from metal gridlines and gives the module its uniform black appearance, while also contributing to higher efficiency and lower operating temperature under load.
Is this the 475W, 480W, 490W or 500W version?
This listing is specifically for MPN LR7-54HVB-485M, rated at 485W and 23.8% module efficiency. The full power range for this platform (475W–500W) is shown in the variant table above — always check the printed MPN on the module label matches your order.
What is the difference between this module and the LR7-54HVH "Explorer" series?
The LR7-54HVB "Artist" series (this product) uses a single sheet of 3.2mm tempered glass and weighs 21.6kg. The visually similar LR7-54HVH "Explorer" series uses a dual-glass construction, which changes the weight, mechanical loading figures, and roof mounting requirements. Confirm the full MPN before treating the two ranges as interchangeable.
What warranty does this module carry?
LONGi provides a 25-year warranty covering materials and workmanship, plus a 30-year linear power output warranty guaranteeing at least 88.85% of rated power output at year 30.
Can this module be used in a high-wind or coastal UK installation?
The module carries a 5400Pa front-side and 2400Pa rear-side static loading rating along with certified 25mm hailstone impact resistance at 23m/s, which covers the majority of UK wind and weather loading scenarios. Mounting system selection and fixing centres should still be specified by the installer to suit the specific roof pitch, height, and exposure category.
