Solar panel LONGI Hi-MO X10 - LR7-54HVH - 490 Wp - Back Contact

LONGi Hi-MO X10 LR7-54HVH 490 module Wp – Back Contact HPBC 2.0

490 Wp With a 24% STC yield, the LONGi LR7-54HVH breaks the psychological barrier on demanding roofs. It's the benchmark for Back Contact HPBC 2.0 systems for residential projects where every square meter counts.

Back Contact HPBC 2.0: Technology and Performance Data

LONGi's Back Contact Technology (HPBC 2.0) relocates all electrical contacts to the rear panel. Zero busbars on the front panel mean maximum active area, improved cell thermal efficiency, and no internal shadows. This allows the LR7-54HVH-490M to achieve a 24.0% module efficiency in STC—a level rarely reached in this 1800 × 1134 mm form factor.

Key performance data:

• Module efficiency: 24.0% in STC (LR7-54HVH-490M) — +0.5 pt vs standard TOPCon at equivalent power

• Power tolerance: 0 ~ +3% — each module delivered equals or exceeds its rated power

• Dégradation première année : < 1 %, puis 0,35 %/an de l'année 2 à 30 — 88,85 % de puissance résiduelle garantie

• Maximum temperature coefficient Pmax: -0.260 %/°C — limits heat loss on south-facing roofs

• System voltage: DC 1500 V (IEC) — long strings, compatible with Huawei , Sungrow , Fronius , and SMA inverters

• Low carbon certification PPE2/PPE2 V2 (modules manufactured after January 2025) — eligibility for CRE4 applications and public tenders

Mechanical characteristics and field durability

• Dimensions : 1800 × 1134 × 30 mm — standard residential size, compatible with Mounting systems certified by POwR Certifications

• Weight : 21.6 kg — two-person handling, tile laying/ Trapezoidal sheet metal without constraint

• 3.2 mm coated tempered glass — RG4 certified (hailstones 40 mm at 27.54 m/s), internally validated up to 45 mm at 30 m/s

• Static load front face: 5,400 Pa / rear face: 2,400 Pa — compliant with wind and snow zones in metropolitan France (NV65)

• IP68 junction box, 3 diodes — hotspot protection, long-term reliability on pitched roofs

• Double encapsulated POE — moisture resistant, minimal PID

• Hybrid Passivation - Partial shading management per cell for optimized production

• Anodized aluminum frame, black frame, white background — high-end roof aesthetic, maintenance-free

• Front panel without a visible busbar — the Back Contact architecture eliminates any visible metal mesh on the front panel; the module surface is homogeneous and uniform, without the characteristic silver lines of the TOPCon. A concrete aesthetic advantage for residential rooftops visible from the street or from exterior spaces.

Professional application areas

High-end residential and constrained roof

The LR7-54HVH 490 Wp It is the natural choice for residential roofs with limited available surface area: detached houses with dormer windows, complex roofs, and partially shaded slopes. Its 24% efficiency allows it to extract more power per square meter than a standard TOPCon 490W module (typical efficiency 22–22.5%). For an installer selling a premium solution, this is a concrete differentiating factor on the job site. The 30-year linear warranty reinforces the ROI message for long-term customers.

C&I and demanding commercial facilities

On rooftops Trapezoidal sheet metal For applications with shallow slopes or parking lot canopies, the temperature coefficient of -0.260%/°C and optimized partial shading management (Back Contact cell) reduce actual production losses compared to a PERC or TOPCon module. For installations between 36 kWp and 200 kWp, the 1500 V voltage optimizes string length and reduces DC cabling costs. PPE2 certification is a direct advantage for public funding applications.

Installations in hail-prone areas

The RG4 certification (confirmed by IEC 62938) positions the LR7-54HVH 490 Wp as a justifiable choice in the Rhône-Alpes, Grand Est, Massif Central, and Pyrenees regions—areas where insurers and project owners require documented hail certification. It's a differentiating sales argument that few installers sufficiently emphasize.

Why order the LONGi 490 Wp at the house of POwR Connect

POwR Connect is the exclusive B2B distributor for PV professionals, specializing in photovoltaic equipment and EV charging infrastructure.

• Stock available, order online — no intermediaries, controlled delivery time on a Tier 1 brand

• Installer pricing — professional rate with no processing fees, adapted to project volumes

• Complete LONGi range — Hi-MO X10 from 485 to 490 Wp available, including the Wp version for budget-optimized projects

• Technical documentation — French datasheet available for download, IEC certificates, PPE2 file available on request

• Sizing support — PV technical team to validate inverter and string compatibility

FAQ — LONGi LR7-54HVH 490 Wp Back Contact

What is the concrete difference between 490 Wp and 485 Wp for a residential construction site?
Both modules share the same HPBC 2.0 architecture and form factor. The LR7-54HVH-490M boasts 24.0% efficiency compared to 23.76% for the LONGi LR7-54HVH 485 Wp — a difference of approximately +0.25 points. In an installation of 12 modules (5.88 kWp vs. 5.82 kWp), the difference in annual production is negligible. The 490 Wp It is necessary when the available space is truly limited or when the client is looking for a documented premium offer.

What is the difference between Back Contact HPBC 2.0 and TOPCon in terms of performance?
Back Contact technology moves all contacts to the rear panel, eliminating busbar shadowing on the cell. The TOPCon improves efficiency through a tunnel passivation layer but retains the contacts on the front panel. Under STC conditions, the LR7-54HVH-490M achieves 24.0% efficiency compared to the typical 22–22.5% for a similarly sized TOPCon 490W. This difference persists under real-world conditions, especially with high direct irradiance.

Quelle est la garantie réelle sur la puissance à 30 ans ?
LONGi garantit 88,85 % de la puissance nominale à 30 ans : dégradation < 1 % la première année, puis 0,35 %/an jusqu'à l'année 30. La garantie produit 25 ans est activée via l'extension de garantie partenaire LONGi. À titre de comparaison, un module PERC standard garantit typiquement 80–83 % à 25 ans.

Is the module eligible for CRE and PPE2 tenders?
Yes, for modules manufactured after January 2025, the LR7-54HVH has PPE2 and PPE2 V2 low-carbon certification. This certification is required for CRE4 tenders in France. POwR Connect can provide certification documentation upon request.

Can 490 Wp and 485 Wp be mixed in the same string?
Not recommended. String current is limited by the lowest power module. Use modules of identical power on the same MPPT. POwR Connect supplies homogeneous batches by power level to avoid this problem on site.