Longi Hi-MO X10 485W Dual Glass Bifacial | LR7-54HVD-485M

Description

The LONGi Hi-MO X10 LR7-54HVD-485M is a 485 W n-type back-contact solar panel built on LONGi's HPBC 2.0 (Hybrid Passivated Back Contact) cell technology. With no grid lines on the front of the cell, it delivers a module efficiency of 23.8% and a power density of 238 W/m², so more kilowatts fit onto the same roof area.

The dual glass, bifacial construction (2.0 mm front glass and 1.6 mm rear glass) lets the module also generate from light reaching its back face, with a bifaciality of 70 ± 5%. Combined with the black anodised aluminium frame, the 108 half-cut cells and the anti-shading design that limits localised overheating, it suits premium residential roofs and ground-mount or flat-roof arrays where rear-side gain is available. The panel is backed by a 30-year linear performance warranty.

485 W

Peak power (STC)

23.8%

Module efficiency

70 ± 5%

Bifaciality

30 years

Performance warranty

1500 V

Max system voltage DC

23.5 kg

Weight per panel

Safety and compliance

Solar arrays produce dangerous DC voltage whenever the modules are illuminated. Installation must be carried out by a competent installer in line with BS 7671 and the manufacturer's installation manual. Grid-connected systems must be notified to the DNO under G98 or G99, and MCS installations should use the module's MCS product certificate (BABT17012-1040-485W).

Compatibility: size strings with the cold-weather Voc

Open-circuit voltage is 40.64 V at STC with a Voc temperature coefficient of -0.200%/°C, so it rises in cold weather (about 43.5 V per panel at -10 °C). Check the inverter's maximum DC input voltage and current limits. As a bifacial module, rear-side gain raises Isc and Imp, so allow for it when sizing cables, optimisers or microinverters, and keep within the 30 A maximum series fuse rating.

Warranty note

The 30-year performance warranty guarantees at least 99% of nominal power in year 1, then no more than 0.35% decline per year, reaching at least 88.85% by year 30 (front side output). The product (materials and workmanship) warranty period depends on the LONGi warranty edition, so please check the warranty certificate supplied with your order.

In the box and on the pallet

Panels are supplied on pallets of 36 modules (216 per 20' container, 864 per 40' HC). Frame colour is black with a white rear appearance, and the junction box is rated IP68.

Key features

HPBC 2.0 back contact cells

A gridless front surface removes busbar shading, lifting efficiency to 23.8% and giving a clean, uniform appearance.

Bifacial dual glass

Glass on both sides with 70 ± 5% bifaciality captures reflected and diffuse light on the rear, ideal over light-coloured roofs, gravel or ground-mount arrays.

Anti-shading protection

Designed to manage shading and prevent localised overheating, with BC cells running at a lower operating temperature and a Pmax coefficient of -0.260%/°C.

30-year power warranty

At least 99% in year 1, then a maximum 0.35% annual decline, with at least 88.85% guaranteed at year 30.

Built for UK weather

IP68 junction box, operating range of -40 °C to +85 °C, IEC fire rating Class C, tested against 25 mm hail at 23 m/s.

Compact 485 W format

1800 x 1134 x 30 mm and 23.5 kg, with a 238 W/m² power density that maximises output on limited roof space.

Technical specifications

Electrical characteristics (STC: AM1.5, 1000 W/m², 25 °C)

Maximum power (Pmax)

485 W

Open circuit voltage (Voc)

40.64 V

Short circuit current (Isc)

15.08 A

Voltage at maximum power (Vmp)

33.62 V

Current at maximum power (Imp)

14.43 A

Module efficiency

23.8%

Power output tolerance

0 to +3%

Bifaciality

70 ± 5%

Electrical characteristics (NOCT: AM1.5, 800 W/m², 20 °C, 1 m/s)

Maximum power (Pmax)

369 W

Open circuit voltage (Voc)

38.61 V

Short circuit current (Isc)

12.10 A

Voltage at maximum power (Vmp)

31.93 V

Current at maximum power (Imp)

11.56 A

Temperature ratings and operating limits

Temperature coefficient of Pmax

-0.260%/°C

Temperature coefficient of Voc

-0.200%/°C

Temperature coefficient of Isc

+0.050%/°C

Nominal operating cell temperature (NOCT)

45 ± 2 °C

Operating temperature range

-40 °C to +85 °C

Maximum system voltage

DC 1500 V (IEC)

Maximum series fuse rating

30 A

Protection class

Class II

Fire rating

IEC Class C

Hail test

25 mm hailstone at 23 m/s

Mechanical data

Cell technology

n-type HPBC 2.0 back contact, monocrystalline

Cell configuration

108 half-cut cells (6 x 18)

Construction

Dual glass, bifacial: 2.0 mm front glass + 1.6 mm rear glass

Frame

Black anodised aluminium alloy

Dimensions (L x W x H)

1800 x 1134 x 30 mm (tolerance ± 2 mm)

Weight

23.5 kg

Junction box

IP68, three diodes

Output cable

4 mm², +400 / -200 mm or ±1200 mm (length customisable)

Connector

EVO2A (Stäubli) or PV-LR5 (LONGi)

Packaging

36 pcs per pallet, 216 pcs per 20' GP, 864 pcs per 40' HC

Product identification and certification

Manufacturer

LONGi

Series

Hi-MO X10

Model / MPN

LR7-54HVD-485M

MCS certificate

BABT17012-1040-485W

Standards

IEC 61215, IEC 61730

Manufacturer quality systems

ISO 9001, ISO 14001, ISO 45001, IEC 62941

Performance warranty

30 years linear (99% year 1, 0.35% annual decline, 88.85% at year 30)

Frequently asked questions

What does bifacial mean, and how much extra energy will I get?

A bifacial module generates power from both faces. This panel has a bifaciality of 70 ± 5%, and the manufacturer publishes electrical values for 5% to 25% rear-side gain. The actual gain depends on ground or roof reflectivity, mounting height and tilt, so it is highest over light surfaces and with clearance behind the panel.

What is HPBC 2.0 and why are there no grid lines on the front?

HPBC 2.0 is LONGi's second-generation Hybrid Passivated Back Contact cell. All metal contacts sit on the rear of the cell, so the front surface has no busbars or fingers to block light. That improves efficiency and gives the panel a uniform, premium look.

How do I size strings with a 40.64 V open circuit voltage?

Calculate the cold-weather Voc using the -0.200%/°C coefficient. At -10 °C, each panel is about 43.5 V (40.64 V x 1.07). Multiply by the number of panels in series and keep the result below the inverter's maximum DC input voltage, and below 1500 V system voltage. Also check the inverter's current limits, remembering that rear-side gain increases current.

What does the 30-year performance warranty cover?

LONGi guarantees at least 99% of nominal power in year 1, with annual decline of no more than 0.35% from year 2, giving at least 88.85% at year 30. It applies to the front-side output of the module. Product warranty terms are set out in the LONGi warranty certificate supplied with your order.

Is this panel MCS certified?

Yes. The MCS product certificate for this model is BABT17012-1040-485W. The panel is also certified to IEC 61215 and IEC 61730. Your installer must still be MCS certified for the installation itself to qualify.

What are the dimensions and how many panels come on a pallet?

Each panel measures 1800 x 1134 x 30 mm and weighs 23.5 kg. They are packed 36 per pallet, with 216 per 20' container and 864 per 40' HC container.

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Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

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