What is the LR7-72HGD 585~620M?
- Rated power: 585–620 W per module with a 0~3% positive power tolerance
- Module efficiency: 21.7% at 585W rising to 23.0% at 620W
- Cell technology: N-type HPDC half-cell, 144 cells (6×24) — neither back-contact nor standard TOPCon
- Bifaciality: 80±5%, dual 2.0+2.0 mm semi-tempered glass, 33.5 kg
- Warranty: 12-year product warranty plus a 30-year linear power warranty (87.40% in year 30)
The LONGi Hi-MO 7 LR7-72HGD 585–620W is a bifacial glass-glass module built on N-type HPDC cells. Its standout figure is a bifaciality factor of 80±5% — higher than LONGi's own back-contact families — meaning the rear face converts noticeably more reflected light into power. That makes it the module our engineers specify for ground mounts, solar farms and light-coloured metal-sheet roofs where the array sits high enough for light to reach underneath, rather than for panels lying flush on tile. Compare it with the rest of the range under equipment, see what our turnkey scope covers under services, and review PEA permits to understand the grid-connection process we manage for you.
What is the LR7-72HGD, and when should you choose it over the Hi-MO X10?
Hi-MO 7 uses N-type HPDC cells in a 144 half-cell layout (6×24) — a different technology branch from the back-contact cells in the Hi-MO X families, and not standard TOPCon either. The module is a glass-glass build with 2.0+2.0 mm semi-tempered glass, weighing 33.5 kg at 2382 × 1134 × 30 mm. Front-side efficiency runs from 21.7% at 585W to 23.0% at 620W, below the Hi-MO X range. What it wins on is the rear: 80±5% bifaciality, the highest of the three LONGi modules we recommend. Over pale concrete, light gravel or a bright metal-sheet roof with adequate mounting height, that rear-side yield is where this panel repays the choice. Two things deserve a careful read before you commit. First, warranty structure: the power warranty runs a full 30 years, capped at 1% degradation in year one then 0.4% annually, leaving 87.40% at year 30 — but the product warranty is 12 years, shorter than the Hi-MO X families, and that distinction belongs in writing on your quotation. Second, the datasheet published on the official product page marks itself as a preliminary revision, so the tabulated figures should be confirmed against the latest file from an appointed distributor before they are written into a contract. If you are still comparing options and budgets, our page on solar cost in Phuket covers how module choice affects total project cost.
Highlights from the datasheet
- 80±5% bifaciality, the highest in this LONGi line-up: the rear face produces roughly four-fifths of the front when it receives reflected light, so return per watt on elevated or ground-mounted arrays is better than the front-side efficiency figure alone suggests.
- 30-year linear power warranty: capped at 1% degradation in year one, then 0.4% per year, requiring 87.40% of original output at year 30 — the same duration as the brand's flagship module.
- 12-year product warranty — read this line carefully: shorter than the Hi-MO X families and entirely separate from the power warranty. If a quotation simply says "30-year warranty", ask which one it means before signing.
- Wide 585–620 W power range: spanning 21.7% to 23.0% efficiency, giving procurement flexibility to balance cost per watt against available area on large orders.
- Design-critical electricals: the 620W version delivers Vmp 44.55 V / Imp 13.92 A and Voc 52.66 V / Isc 14.81 A at STC, rated to DC1500V under both IEC and UL, with a 30A maximum series fuse.
- Built for exposed outdoor sites: 5400 Pa front and 2400 Pa rear mechanical load, hail-tested at 25 mm and 23 m/s, IP68 junction box with 3 bypass diodes, and a UL type 29 / IEC Class C fire rating.
- Temperature coefficient of -0.280 %/°C: on par with the Hi-MO X6 Max but higher than the HPBC 2.0 flagship, so it loses slightly more output when hot — a reason to design in proper ventilation clearance beneath the array.
Key specifications (LR7-72HGD 585~620M)
| Specification | Datasheet value |
|---|---|
| Maximum Power (Pmax) | 585–620 W (ค่าเผื่อกำลัง 0~3%) |
| Module Efficiency | 21.7% (585W) ถึง 23.0% (620W) |
| Cell Technology | N-type HPDC (Hybrid Passivated Dual-junction Cell) แบบฮาล์ฟเซลล์ — ไม่ใช่ back contact และไม่ใช่ TOPCon มาตรฐาน |
| Cell Orientation | 144 เซลล์ (6×24) |
| Voltage / Current at Maximum Power | 44.55 V / 13.92 A (รุ่น 620W, STC) |
| Open Circuit Voltage / Short Circuit Current | 52.66 V / 14.81 A (รุ่น 620W, STC) |
| Temperature Coefficient of Pmax | -0.280 %/°C |
| Temperature Coefficient of Voc / Isc | -0.230 %/°C / +0.045 %/°C |
| Dimensions | 2382 × 1134 × 30 มม. |
| Weight | 33.5 กก. |
| Glass / Frame | กระจกสองชั้น 2.0+2.0 มม. semi-tempered / เฟรมอะลูมิเนียมอโนไดซ์ |
| Mechanical Loading | ด้านหน้า 5400 Pa · ด้านหลัง 2400 Pa · ทดสอบลูกเห็บ 25 มม. ที่ความเร็ว 23 ม./วินาที |
| Product Warranty | 12 ปี (วัสดุและกระบวนการผลิต) |
| Power Warranty | 30 ปี เชิงเส้น (ปีที่ 30 เหลือ 87.40%) |
| Power Degradation | ปีแรก <1% · ปีที่ 2–30 ปีละ 0.4% |
| Other Electrical & Environmental Ratings | ค่าไบเฟเชียล 80±5% · แรงดันระบบสูงสุด DC1500V (IEC/UL) · ฟิวส์อนุกรมสูงสุด 30A · NMOT 45±2°C · อุณหภูมิใช้งาน -40°C ถึง +85°C · กล่องต่อสาย IP68 มี 3 ไดโอด · Protection Class II · ทนไฟ UL type 29 / IEC Class C |
Note: every figure above comes straight from the LONGi Green Energy Technology Co., Ltd. (隆基绿能科技股份有限公司) datasheet. Actual system design (strings per MPPT, cable sizing, breakers) must be calculated for each site.
Why this model suits Phuket
- Ground mounts and yard space beside industrial buildings: land in Phuket and Phang Nga often includes concrete hardstanding or pale gravel that reflects well, turning the 80±5% bifaciality into measurable kWh.
- Factory and warehouse metal-sheet roofs: light-coloured roofs with enough mounting height let both light and air pass beneath the panels, gaining rear-side yield and better cooling at the same time.
- Andaman rain and monsoon wind: the glass-glass construction rated at 5400 Pa front and 2400 Pa rear, the IP68 junction box and the -40°C to +85°C operating range are designed for fully exposed installations.
- Large projects priced on cost per watt: when area is not the binding constraint, a competitively priced module with strong bifacial gain generally returns more than paying a premium for maximum efficiency per square metre.
Who it suits
- Factories and warehouses: with large metal-sheet roofs or adjacent open land, where the investment case is driven by cost per watt.
- Ground-mount arrays and solar farms: where panels sit elevated above light-coloured ground — the only condition under which 80±5% bifaciality actually pays.
- Resorts and hotels with spare land: able to build a ground-mounted array instead of forcing capacity onto a structurally limited roof.
- Long-horizon project owners: who value the 30-year power warranty and accept the 12-year product warranty term.
- Sites with strong supporting structure: since this glass-glass module weighs 33.5 kg, it needs steel or reinforced concrete framing designed to carry it.
Summary
The LONGi Hi-MO 7 LR7-72HGD 585–620W suits projects where space is not the limiting factor but cost per watt and total yield are — 80±5% bifaciality and a 30-year power warranty are its real strengths. Before signing anything, note that the product warranty is 12 years, shorter than the Hi-MO X families, and that the published datasheet identifies itself as a preliminary revision, which is why we confirm figures with an appointed distributor at design stage. Size your project with the calculator, review our scope under services, then contact us for a site assessment.
See other models from this brand on the LONGi overview, or browse all the equipment we install.
Download the datasheet (PDF) — full manufacturer specification sheet