
LONGi 530W MONO Black Frame HPBC Half Cell Solar Panel - Grade B
LONGi 530W MONO Black Frame HPBC Half Cell Solar Panel - Grade B
The LONGi MONO Black Frame HPBC Half Cell, rated 530 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
- Half-cut cell layout
- Black anodised frame
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) | 530 W |
| Module efficiency | 22.3 % |
| Open-circuit voltage (Voc) | 48.57 V |
| Voltage at maximum power (Vmp) | 40.22 V |
| Short-circuit current (Isc) | 14.00 A |
| Current at maximum power (Imp) | 13.18 A |
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.
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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.

