Aiko Stellar 1N+ 645W Bifacial Solar Panel | AIKO-G645-MCH72Dw

Description

The Aiko Stellar 1N+ 645W (AIKO-G645-MCH72Dw) is a bifacial, dual-glass solar panel built on N-type ABC (All Back Contact) cells. With 144 half-cut cells, a 23.9% module efficiency and a silver anodised aluminium frame, it delivers 645 W from a 2382 × 1134 × 30 mm footprint - well suited to commercial rooftops, ground-mount arrays and large residential roofs where every square metre of space has to work hard.

ABC technology moves every electrical contact to the rear of the cell, so the front surface carries no metal grid lines. AIKO uses this design to deliver cell-level partial shading optimisation, high-temperature restriction, micro-crack resistance and a low -0.26%/°C power temperature coefficient. The panel is covered by a 15-year product warranty and a 30-year linear performance warranty that guarantees 88.85% of rated output at year 30.

This listing is the short-cable (01C) version, fitted at the factory with MC4-compatible / MC4-Evo2 connectors on 4 mm² solar cable and protected by an IP68 junction box with 3 bypass diodes.

645 W

Rated power (STC)

23.9%

Module efficiency

144

Half-cut N-type ABC cells

-0.26%/°C

Power temperature coefficient

30 years

Linear performance warranty

1500 V DC

Maximum system voltage

Safety and installation requirements

Solar panels produce DC voltage whenever light falls on them, up to 53.9 V open-circuit per panel, and series strings add up quickly. Installation, wiring and commissioning must be carried out by a competent person in line with BS 7671 (including Section 712), the AIKO installation manual and, where applicable, MCS requirements. At 33.5 kg and 2.38 m long, each panel needs two-person handling and suitable working-at-height controls. The completed system must also be notified to the DNO under G98 or applied for under G99 by the installer.

Short-cable version - plan your string layout

The manufacturer's datasheet lists two standard lead options, +350 mm / -280 mm and ±1400 mm, plus custom lengths. This product is the short-cable variant, so check that your module layout lets the factory leads reach neighbouring panels, or allow for solar extension cable with matching connectors. Mate connectors only with MC4-Evo2 or certified-compatible connectors to keep the string connections reliable and safe.

Bifacial gain depends on your installation

The rear side of this panel also generates power. AIKO quotes a bifacial factor of 70 ± 5%. Real-world rear gain depends on mounting height, tilt and how reflective the surface beneath the array is, so it is greatest on flat roofs and ground mounts over light-coloured surfaces and smallest on roof-flush installations.

Key Features

N-Type ABC Cell Technology

All contacts sit on the rear of the cell, leaving a clean, grid-free front surface. The panel uses 144 half-cut cells (6 × 24) to reach 23.9% efficiency and 645 W in a standard-size frame.

Partial Shading Optimisation

AIKO's cell-level partial shading optimisation helps the panel hold up its output when chimneys, vents, parapets or nearby structures cast shadows over part of the array.

Bifacial Dual-Glass Design

2.0 mm + 2.0 mm glass front and rear gives a robust, sealed laminate that also collects light on the back. Rated bifacial factor 70 ± 5%.

Better Heat Performance

A low -0.26%/°C temperature coefficient keeps more power in hot conditions, while AIKO's high-temperature restriction feature is designed to protect the module in demanding rooftop environments. Operating range -40°C to +85°C.

Micro-Crack Resistance and Low Degradation

Designed to resist micro-cracks, with first-year degradation of 1% or less and 0.35% per year or less from year 2 to 30. Guaranteed output is 90.6% at year 25 and 88.85% at year 30.

Strong Mechanical Rating

Tested to a static load of 5400 Pa front / 2400 Pa rear with a 30 mm anodised aluminium frame. The IP68 junction box includes 3 bypass diodes and the connectors are MC4-Evo2 compatible.

Suitable For

Commercial and Industrial Roofs

Large flat or pitched roofs where high power density reduces the number of panels, rails and connections.

Ground-Mount Arrays

Open sites where the bifacial rear gain and 1500 V DC rating can be used to full effect.

Large Residential Roofs

Properties with generous roof space, partial shading from roof features and a need for long-term warranty cover.

Technical Specifications

Electrical Characteristics

Parameter

STC

NOCT

Rated power (Pmax)

645 W

489 W

Module efficiency

23.9%

-

Voltage at max power (Vmp)

45.20 V

42.88 V

Current at max power (Imp)

14.27 A

11.41 A

Open-circuit voltage (Voc)

53.90 V

51.14 V

Short-circuit current (Isc)

15.00 A

12.12 A

Test conditions

STC: AM1.5, 1000 W/m², 25°C. NOCT: AM1.5, 800 W/m², 20°C, 1 m/s wind. Power tolerance 0 to +3%. Voc and Isc tolerance ±3%.

Temperature and System Ratings

Temperature coefficient of Pmax

-0.26%/°C

Temperature coefficient of Voc

-0.22%/°C

Temperature coefficient of Isc

+0.05%/°C

Operating temperature

-40°C to +85°C

Maximum system voltage

1500 V DC

Maximum series fuse rating

30 A

Protection class

Class II

Maximum static load

Front 5400 Pa / Back 2400 Pa

Mechanical Specification

Cell type

N-type ABC monocrystalline

Number of cells

144 half-cut cells (6 × 24)

Bifacial factor

70 ± 5%

Glass

Dual glass, 2.0 mm + 2.0 mm

Frame

Silver anodised aluminium, 30 mm

Dimensions (L × W × H)

2382 × 1134 × 30 mm

Weight

33.5 kg ±3%

Junction box

IP68, 3 bypass diodes

Cable

4 mm² (IEC) / 12 AWG (UL)

Lead length options (datasheet)

+350 mm / -280 mm, ±1400 mm or custom - this listing is the short-cable version

Connector

MC4 compatible / MC4-Evo2

Mounting and Packaging

Standard mounting holes

4 × M8 at 790 mm and 1400 mm spacing

Additional mounting holes

4 × M6 at 400 mm spacing (for tracker systems)

Bolt tightening torque

M8: 16-20 Nm / M6: 8-12 Nm

Grounding holes

4 × Ø4.2 mm

Pallet quantity

36 panels per pallet

Warranty and Identification

Product warranty

15 years

Linear performance warranty

30 years

First-year degradation

1% or less

Annual degradation, years 2-30

0.35% per year or less

Guaranteed output at year 25 / year 30

90.6% / 88.85%

Manufacturer

Aiko

Series

Stellar 1N+

Manufacturer model

AIKO-G645-MCH72Dw

Part number

AIK-G-MCH72-645-SF-DG-01C

Frequently Asked Questions

Is this the short-cable or long-cable version?

This listing is the short-cable (01C) version. The manufacturer's datasheet gives +350 mm / -280 mm and ±1400 mm as the standard lead options. Check your array layout before ordering and use solar extension cable with matching MC4-Evo2 or certified-compatible connectors where the factory leads do not reach.

Is the panel bifacial, and how much extra energy will I get?

Yes, it generates from both sides and has a bifacial factor of 70 ± 5%. The rear-side gain you actually see depends on the mounting height, tilt and the reflectivity of the surface below. There is no fixed figure for every site, so it is best treated as a bonus on flat-roof and ground-mount installations rather than a guaranteed uplift.

How big is a 645 W panel and how many do I need?

Each panel measures 2382 × 1134 mm (about 2.70 m²) and weighs 33.5 kg, roughly 12.4 kg/m² for the panel alone. As a guide, 16 panels give about 10.32 kWp and cover around 43 m² of roof or ground. Check roof structure, rail loading and the mounting system's panel-size range before you finalise the design.

How many panels can I put in one string?

String length is set by your inverter, not the panel's 1500 V rating. Voc rises as it gets colder: at -10°C (a commonly used UK design low) each panel's Voc is about 58 V using the -0.22%/°C coefficient, so a 1000 V inverter limit allows up to 17 panels in series. Also check the inverter's MPPT voltage window against the 45.20 V Vmp and leave margin against its maximum input current, because bifacial rear gain can lift operating current above front-side figures.

How do I mount it?

The panel has 4 × M8 mounting holes at 790 mm and 1400 mm spacing, plus 4 × M6 holes at 400 mm for tracker systems. Tighten M8 bolts to 16-20 Nm and M6 to 8-12 Nm. For clamp mounting, follow the permitted clamp zones in the AIKO installation manual so the 5400 Pa / 2400 Pa static load rating applies. Use a mounting system rated for a 30 mm frame and dual-glass panels.

What does the warranty cover?

AIKO provides a 15-year product warranty and a 30-year linear performance warranty. Output is guaranteed at 90.6% after 25 years and 88.85% after 30 years, with first-year degradation of 1% or less. Keep your purchase paperwork and the panel serial numbers for any claim, and contact us if you need help raising one.

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Room Dimensions

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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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