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JA Solar 450W N-type Double Glass Bifacial LB Traceable Hail Resistance Class 4 54 Cell All Black MC4 Solar Panel
JA Solar 450W N-type Double Glass Bifacial LB Traceable Hail Resistance Class 4 54 Cell All Black MC4 Solar Panel
The JA Solar JAM54D41 LB 450 W is an N-type mono solar panel. It delivers 22.5 % module efficiency from a 1,762 × 1,134 mm frame.
About the JA Solar Deep Blue 4.0 Pro range
Deep Blue 4.0 Pro is JA Solar's n-type platform, using Bycium+ cells with a better temperature coefficient, lower light-induced degradation and improved low-light behaviour than the p-type modules it replaces.
At 1,762 × 1,134 mm it is a residential-format module, sized to fit the rafter spans and roof planes of a standard UK house. The black frame and dark cells keep the array visually quiet on a front-facing roof. Being bifacial, it earns most of its extra yield on flat roofs, ground mounts and light-coloured surfaces, where light reaches the back of the module; on a pitched tiled roof the rear-side gain is small.
Why installers specify this panel
- −0.290 %/°C power temperature coefficient — output falls away more slowly as the modules heat up through the middle of the day.
- Bifacial, 80 % ±10 % — the rear face adds generation from reflected and diffuse light, which suits flat roofs, ground mounts and light-coloured surfaces.
- Hail tested: Hail Resistance Class 4 (HW4) — relevant for exposed and upland UK sites.
- Reinforced load rating, 8,000 Pa front / 5,000 Pa back — for high-snow and high-wind locations.
- All-black appearance — a black anodised frame and dark cells, for domestic roofs where the array has to be discreet.
- 0 to +3 % power tolerance — every module is sorted to meet or beat its 450 W nameplate rating.
Electrical characteristics (STC)
| Rated power (Pmax) | 450 W |
| Module efficiency | 22.5 % |
| Open-circuit voltage (Voc) | 40.30 V |
| Voltage at maximum power (Vmp) | 32.99 V |
| Short-circuit current (Isc) | 14.41 A |
| Current at maximum power (Imp) | 13.64 A |
| Power tolerance | 0 to +3 % |
| Power with 10% rear irradiance | 486 W |
| Maximum system voltage | DC 1500 V |
| Maximum series fuse rating | 30 A |
STC: AM1.5, 1,000 W/m², 25 °C cell temperature.
Mechanical specification
| Cell technology | N-type mono |
| Number of cells | 108 (6 × 18) |
| Front / back glass | 2.8 mm / 2.0 mm |
| Dimensions (H × W × D) | 1,762 × 1,134 × 30 mm |
| Weight | 28 kg |
| Junction box | IP68, 3 bypass diodes |
| Connector | MC4-EVO2A |
| Cable | 4 mm² (IEC), 12 AWG (UL) |
Temperature and load ratings
| Temperature coefficient of Pmax | −0.290 %/°C |
| Temperature coefficient of Voc | −0.250 %/°C |
| Temperature coefficient of Isc | +0.045 %/°C |
| Operating temperature | −40 °C to +85 °C |
| NOCT | 45 ±2 °C |
| Maximum static load | 8,000 Pa front / 5,000 Pa back |
| Hail class | Hail Resistance Class 4 (HW4) |
| Fire performance | Class C |
Array sizing
Each panel covers 2.00 m². A 4 kWp array needs 9 of them (4.05 kWp over about 18 m²). A 6 kWp array needs 13 of them (5.85 kWp over about 26 m²). At 28.0 kg each they are a two-person lift.
About JA Solar
JA Solar is one of the highest-volume module manufacturers in the industry. Its Deep Blue 4.0 Pro platform uses n-type Bycium+ cells with 16-busbar half-cell interconnection, and carries IEC 61215, IEC 61730, UL 61215 and UL 61730 certification alongside ISO 9001, ISO 14001, ISO 45001 and IEC 62941.
Datasheets, installation manuals and warranty documents for the JA Solar JAM54D41 LB are in the Documents tab below. Buying for a project? Contact our sales team at sales@clearraysolar.com for pallet pricing.
Build your complete solar system
Everything you need in one place.
- Inverters
- Batteries
- Mounting Systems
- Cabling & Accessories
- Protection Devices
Delivery times vary by region:
- UK — 1-2 business days
- Highlands & Islands — 1-2 business days
Returns accepted within 14 days of delivery for unused items in original packaging.
