LONGi 475W Hi-MO X10 Artist HPBC 54 Cell All Black MC4-EVO2 Solar Panel - Grade B
LONGi 475W Hi-MO X10 Artist HPBC 54 Cell All Black MC4-EVO2 Solar Panel - Grade B
The LONGi Hi-MO X10 Artist HPBC 54 Cell All Black MC4-EVO2, rated 475 W, is offered here as Grade B stock — a solar panel built on HPBC back-contact cells. LONGi's HPBC back-contact cells carry no front-side busbars, so the whole front surface collects light and the module presents a uniform face.
What Grade B means
Grade B panels are electrically sound modules that carry minor cosmetic marks — scratches, blemishes or small dents to the frame or glass — picked up in transit or handling. They are sold at a discount to the same module in A-grade condition, which makes them worth considering for outbuildings, workshops, barns, ground mounts, off-grid systems and any array where cost per watt matters more than appearance.
Please read before ordering. All Grade B Item sales are final and sold as seen. Grade B items may have minor cosmetic imperfections (e.g., scratches, blemishes, dents, etc.) that do not affect functionality. ClearRay Solar makes no warranties of any kind, whether express or implied, respecting the performance, condition, suitability, merchantability, or any other quality of such items. Grade B Items are not eligible for returns, refunds, or exchange, and are exempt from the ClearRay Solar RMA policy. Product images are for illustrative purposes only and actual products may vary. Purchaser understands and agrees that assertion or enforcement of any manufacturer provided warranty is Purchaser’s sole responsibility.
Panel specification
- HPBC back-contact cells
- All-black: black frame and black backsheet
About the Hi-MO X10 range
Hi-MO X10 is LONGi's high-end residential platform. LONGi rates the HPBC 2.0 cell for higher generation from the same area, a gridline-free low-glare face, and an anti-shading function that limits localised overheating where part of the array is shaded.
Manufacturer specification
These are the manufacturer's published figures for this model in new, A-grade condition. Grade B units are sold as seen and carry no performance warranty from ClearRay Solar — see the notice above.
| Rated power (Pmax) | 475 W |
| Module efficiency | 23.3 % |
| Open-circuit voltage (Voc) | 40.18 V |
| Voltage at maximum power (Vmp) | 33.16 V |
| Short-circuit current (Isc) | 15.03 A |
| Current at maximum power (Imp) | 14.33 A |
| Cell technology | HPBC 2.0 back-contact |
| Number of cells | 108 (6 × 18) |
| Glass | Single glass, 3.2 mm coated tempered |
| Frame | Black anodised aluminium alloy |
| Dimensions (H × W × D) | 1,800 × 1,134 × 30 mm |
| Weight | 21.6 kg |
| Junction box | IP68 |
| Maximum system voltage | DC 1500 V (IEC) |
| Temperature coefficient of Pmax | −0.260 %/°C |
About LONGi
LONGi is one of the largest solar manufacturers in the world and the company behind the Hi-MO series. Its HPBC back-contact platform is the successor to the PERC modules it shipped in volume for a decade, and it is manufactured to IEC 61215 and IEC 61730 under ISO 9001, ISO 14001, ISO 45001 and IEC 62941 quality systems.
Grade B stock is limited to the quantity held and is not restocked. For availability or pallet pricing, contact our sales team at sales@clearraysolar.com.
Almost any modern string inverter will run it - what matters is the string design. Check the panel's Voc and Isc in the Technical Specifications against your inverter's MPPT voltage window and maximum input current, or send us your inverter model and we'll size it for you.
Divide your inverter's maximum input voltage by the panel's open-circuit voltage (Voc), then leave headroom - Voc rises as temperature falls, so size for the coldest morning rather than the average day.
Panels ship with their factory leads fitted; the connector type and cable length are both listed in the Technical Specifications. Extension leads and additional connectors are ordered separately.
Bypass diodes limit the loss to the affected section rather than the whole panel. Where shading is persistent, panel-level optimisers or micro-inverters recover considerably more yield - ask us and we'll spec it.
The product and performance warranties are listed under the Warranty tab in Technical Specifications, and the manufacturer's full terms are in the Documents section.
Yes. Pallet quantities are available on stocked lines and work out cheaper per panel - contact us with your requirements for a project quote.
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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.
