What is the LR7-72HTH 620~630M?
- Rated power: 620–630 W per module with a 0~3% positive power tolerance
- Module efficiency: 23.0% at 620W, 23.1% at 625W, 23.3% at 630W
- Cell technology: HPBC+ half-cell, single-glass construction, 144 cells (6×24)
- Size and weight: 2382 × 1134 × 30 mm at 28.5 kg, 3.2 mm tempered front glass
- Warranty: 15-year product warranty plus a 25-year linear power warranty (89.4% in year 25)
The LONGi Hi-MO X6 Max Scientist LR7-72HTH is a 620–630W single-glass module weighing 28.5 kg that still delivers back-contact efficiency of up to 23.3%. It is the module our engineering team reaches for when the roof structure has a real weight limit, or when panels sit flush against tile or metal sheet so the rear face would never see reflected light anyway — in which case a heavier bifacial glass-glass panel earns you nothing. Compare it side by side with the other modules we specify under equipment, see what a turnkey installation covers under services, and read PEA permits for how we handle the grid-connection paperwork on your behalf.
How does the LR7-72HTH differ from the flagship Hi-MO X10?
This module uses LONGi's HPBC+ cell — an evolved back-contact design — in a 144 half-cell layout (6×24) laminated behind a single 3.2 mm tempered glass sheet, rather than the dual-glass sandwich used on the flagship. The most tangible consequence is mass: 28.5 kg per module, on exactly the same 2382 × 1134 × 30 mm footprint. That difference decides real projects, because it is often the roof structure, not the budget, that caps how many panels you can install. Electrically, the 630W version gives Vmp 44.78 V / Imp 14.07 A and Voc 53.02 V / Isc 15.07 A at STC — a higher-voltage, lower-current profile than the flagship, meaning shorter strings but lighter DC cabling requirements. The Pmax temperature coefficient is -0.280 %/°C, slightly higher than the Hi-MO X10, so it gives up a little more output on the hottest afternoons, and the power warranty runs 25 years rather than 30. One point of transparency worth knowing before you compare quotes: the LR7-72HTH datasheet does not state the cell type at all. The HPBC+ designation comes from LONGi's official product page, and several reseller sites incorrectly describe this module as N-type TOPCon, which contradicts the manufacturer. If you are weighing brands and budgets, our page on solar cost in Phuket breaks down where the money actually goes.
Highlights from the datasheet
- Lighter because it is single-glass: 28.5 kg on a standard 2382 × 1134 × 30 mm footprint. Roofs with a genuine load limit get a viable option without having to shrink the system, and lifting panels onto steep or high roofs becomes a safer job.
- Back-contact efficiency at 23.3%: still in the upper tier of the market. The proposition is high efficiency in a lighter, more cost-controlled package rather than absolute maximum output per square metre.
- 15-year product warranty: the same length as the flagship. That is separate from the 25-year linear power warranty — capped at 1% degradation in year one, then 0.40% per year, leaving 89.4% guaranteed at year 25.
- High voltage, lower current: the 630W version delivers Vmp 44.78 V / Imp 14.07 A and Voc 53.02 V / Isc 15.07 A at STC. The lower current allows more economical DC cable and fusing, with a 25A maximum series fuse rating.
- 5400 Pa front / 2400 Pa rear mechanical load: hail-tested at 25 mm and 23 m/s, NMOT of 45±2°C, and an operating range of -40°C to +85°C.
- Electrical and safety ratings: DC1500V maximum system voltage under both IEC and UL, IP68 junction box, Protection Class II and IEC Class C fire rating.
- Front-side production by design: the datasheet lists no bifaciality figure because this is a single-glass build — which is precisely why it makes sense on flush-mounted roofs, where you are not paying for a rear surface that never receives light.
Key specifications (LR7-72HTH 620~630M)
| Specification | Datasheet value |
|---|---|
| Maximum Power (Pmax) | 620–630 W (ค่าเผื่อกำลัง 0~3%) |
| Module Efficiency | 23.0% (620W) · 23.1% (625W) · 23.3% (630W) |
| Cell Technology | HPBC+ (Hybrid Passivated Back Contact รุ่นปรับปรุง) แบบฮาล์ฟเซลล์ กระจกชั้นเดียว — ระบุในหน้าสินค้า LONGi (datasheet ไม่ระบุชนิดเซลล์) |
| Cell Orientation | 144 เซลล์ (6×24) |
| Voltage / Current at Maximum Power | 44.78 V / 14.07 A (รุ่น 630W, STC) |
| Open Circuit Voltage / Short Circuit Current | 53.02 V / 15.07 A (รุ่น 630W, STC) |
| Temperature Coefficient of Pmax | -0.280 %/°C |
| Temperature Coefficient of Voc / Isc | -0.230 %/°C / +0.050 %/°C |
| Dimensions | 2382 × 1134 × 30 มม. |
| Weight | 28.5 กก. |
| Glass / Frame | กระจกชั้นเดียว 3.2 มม. เคลือบผิว tempered / เฟรมอะลูมิเนียมอโนไดซ์ |
| Mechanical Loading | ด้านหน้า 5400 Pa · ด้านหลัง 2400 Pa · ทดสอบลูกเห็บ 25 มม. ที่ความเร็ว 23 ม./วินาที |
| Product Warranty | 15 ปี (วัสดุและกระบวนการผลิต) |
| Power Warranty | 25 ปี เชิงเส้น (ปีที่ 25 เหลือ 89.4%) |
| Power Degradation | ปีแรก <1% · ปีที่ 2–25 ปีละ 0.40% |
| Other Electrical & Environmental Ratings | แรงดันระบบสูงสุด DC1500V (IEC/UL) · ฟิวส์อนุกรมสูงสุด 25A · NMOT 45±2°C · อุณหภูมิใช้งาน -40°C ถึง +85°C · กล่องต่อสาย IP68 · Protection Class II · ทนไฟ 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
- Many Phuket roofs have a hard weight limit: older timber framing and widely spaced purlins frequently decide how many panels can go on. At 28.5 kg per module, the system size the client actually wants stays achievable.
- Constant heat and humidity: at -0.280 %/°C, every degree above test conditions costs 0.280% of output, which is why we design in ventilation clearance beneath the array instead of mounting it tight against the roof surface.
- Andaman monsoon winds: the 5400 Pa front and 2400 Pa rear load ratings cover the wind pressure and uplift seen here, provided clamps sit in the manufacturer's specified mounting zones and the hardware is corrosion-resistant.
- Difficult access sites: hillside villas and buildings on narrow lanes make panel handling the slowest part of the job. A lighter module measurably reduces installation time and risk on those sites.
Who it suits
- Homeowners: whose existing roof structure has a load limit but who still want back-contact efficiency rather than an entry-level module.
- Pool villas and rental properties: with arrays flush-mounted on tile or metal sheet, where the rear of the panel never receives reflected light and bifacial capability would be wasted spend.
- Restaurants and commercial buildings: that need cost per watt kept within a defined budget while still holding a 15-year product warranty from a tier-one manufacturer.
- Mid-size hotels: with multiple roof decks where panels must be carried up stairs or a service lift — the 28.5 kg weight keeps the installation schedule realistic.
- System expansions: adding capacity on leftover roof area without loading the existing structure any more than necessary.
Summary
The LONGi Hi-MO X6 Max Scientist LR7-72HTH 620–630W is the sensible middle path for most Phuket roof installations: up to 23.3% efficiency from back-contact cells in a single-glass module weighing 28.5 kg, backed by a 15-year product warranty and a 25-year power warranty. The question to settle first is whether your roof would genuinely benefit from a bifacial panel — if the array mounts flush, it will not, and this module is the better value. Estimate your system size with the calculator, or contact us to arrange a site survey and a structural check of your roof before anything is ordered.
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