What is the JAM72D40-570-595/GB?
- Power per panel: 570 / 575 / 580 / 585 / 590 / 595 W with a 0~+3% power tolerance, so a delivered panel is never rated below its label
- Module efficiency: 22.1–23.0%, with the top 595W bin at 23.0% — more kW on the same roof area
- Cell technology: n-type TOPCon (n-Bycium+ 16BB, MBB half-cell, mono), 144 cells in a 6×24 layout, cell efficiency up to 26%
- Size and weight: 2278±2 × 1134±2 × 30±1 mm, 31.8 kg, static load 5400 Pa front / 2400 Pa back
- Warranty per datasheet: 12-year product warranty plus 30-year linear output warranty (1% first-year, then 0.4% per year)
The JA Solar JAM72D40 GB is the dual-glass, bifacial n-type TOPCon panel in the DeepBlue 4.0 Pro family, rated 570–595 W per module on a 2278 × 1134 mm frame — the size Thai mounting rails and clamps are most widely stocked for. Our engineering team specifies it for villa, hotel and commercial roofs across Phuket, Phang Nga and Krabi because it balances high output per panel against panels a crew can actually handle on a roof. This page explains what each datasheet line means for your building rather than just repeating the numbers. If you want to size a system first, start with the calculator, then see how our services cover design, installation and grid paperwork.
What is the JAM72D40 GB, and how does it differ from its DeepBlue 4.0 Pro siblings?
DeepBlue 4.0 Pro is JA Solar's n-type TOPCon platform, branded n-Bycium+ and built as 16BB half-cells with a stated maximum cell conversion efficiency of 26%. The JAM72D40 GB packs 144 of those cells (6×24) into a 2278 × 1134 × 30 mm frame weighing 31.8 kg, giving module efficiency of 22.1–23.0% depending on the power bin. The GB suffix marks the dual-glass bifacial build: a bifaciality figure of 80% ±5% means the rear face can add roughly 80% of the front's output wherever reflected light actually reaches it, which depends on how bright the surface below is and how high the array sits. Among its siblings, the JAM54D41 LB is a shorter, lighter all-black module aimed at houses, while the JAM66D46 LB uses a much larger, heavier frame built for factories and solar farms — leaving the JAM72D40 GB as the all-rounder that fits most projects. You can compare it with the other hardware we design around on the equipment page, and if you need night-time backup as well, read about a hybrid with battery backup before choosing. All figures here come from the Global-EN datasheet, which the manufacturer states is subject to technical change, so we re-check the current revision before every design and quotation.
Highlights from the datasheet
- Temperature coefficient of −0.290 %/°C: this is how much output drops per degree above test conditions. On a Phuket roof the modules run hot almost every afternoon, so this line affects your yearly yield more than the wattage on the label does
- 23.0% module efficiency on the 595W bin: when usable roof area is the constraint — as it is on most villas with pitched, multi-facing roofs — higher efficiency simply means more installed kW in the same footprint
- Power tolerance of 0~+3%: the manufacturer allows a positive deviation only, so a 595W module will not measure below its nameplate at test conditions. It is a fair question to ask of every brand you compare
- Dual-glass construction with 80% ±5% bifaciality: glass on both faces handles humidity better than a polymer backsheet, and over a light-coloured metal roof or a raised flat-roof array the rear face contributes additional yield
- Static load 5400 Pa front / 2400 Pa back: the datasheet gives a combined maximum static load and does not split wind from snow, so we set clamp positions and fixing counts from the installation manual rather than from that single number
- Degradation of 1% in year one, then 0.4% per year for 30 years: the annual figure is what determines how much you are still generating in year twenty — a fraction of a percent compounds into thousands of units over a system's life
- 1500 V DC system voltage and a 30 A maximum series fuse: these set the ceiling for string length and DC fuse sizing, but they must always be matched against the inverter's own limits rather than maximised on their own
Key specifications (JAM72D40-570-595/GB)
| Specification | Datasheet value |
|---|---|
| Rated Maximum Power (Pmax) | 570 / 575 / 580 / 585 / 590 / 595 W (ค่าคลาดเคลื่อนกำลังไฟ 0~+3%) |
| Module Efficiency | 22.1–23.0 % (รุ่น 595W = 23.0 %) |
| Cell Type | n-type TOPCon (n-Bycium+ 16BB, MBB Half-Cell, Mono) — ประสิทธิภาพเซลล์สูงสุด 26% |
| No. of Cells | 144 เซลล์ (6×24) |
| Vmp / Imp at STC | 43.62–44.64 V / 13.07–13.33 A (รุ่น 595W = 44.64 V / 13.33 A) |
| Voc / Isc at STC | 51.52–52.58 V / 13.74–13.99 A (รุ่น 595W = 52.58 V / 13.99 A) |
| Temperature Coefficient of Pmax | −0.290 %/°C (Voc −0.250 %/°C, Isc +0.045 %/°C) |
| Dimensions | 2278±2 × 1134±2 × 30±1 มม. |
| Weight | 31.8 กก. |
| Maximum Static Load (Front / Back) | ด้านหน้า 5400 Pa (112 lb/ft²) / ด้านหลัง 2400 Pa (50 lb/ft²) |
| Bifaciality | 80 % ±5 % |
| Maximum System Voltage / Max Series Fuse Rating | 1500 V DC / 30 A |
| Operating Temperature | −40 °C ถึง +85 °C (NOCT 45±2 °C) |
| Product Warranty | 12 ปี |
| Linear Power Output Warranty | 30 ปี (แบบเชิงเส้น) |
| 1st-year / Annual Degradation | ปีแรก 1 % · ปีถัดไป 0.4 % ต่อปี ตลอด 30 ปี |
Note: every figure above comes straight from the JA Solar Technology Co., Ltd. (晶澳太阳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
- Roofs run hot year-round: there is no cold season here, so modules operate above test conditions almost daily and the −0.290 %/°C coefficient shows up directly in your monthly electricity bill
- Humidity and salt air: coastal sites in Phuket sit in permanent high humidity. The dual-glass build, plus corrosion-appropriate mounting hardware and cable routing chosen at design stage, is what keeps a coastal array serviceable
- Monsoon wind uplift: exposed seaside roofs see strong gusts, so we set clamp spacing and fixing points from the manufacturer's installation manual, using the 5400 Pa front / 2400 Pa back static load rating as the design envelope
- PEA grid-connection paperwork: Phuket is served by the Provincial Electricity Authority, and an application needs the actual module specification and certificates attached. We prepare and file that package for you — see PEA permits
Who it suits
- Pool villa owners: complex, multi-facing roofs that need real output per panel while staying installable — at 31.8 kg the module is still within normal handling range for a trained crew
- Hotels and resorts: air-conditioning and pool pump loads peak in the same daylight hours the array produces, and the standard frame size makes phased expansion straightforward later
- Commercial buildings and restaurants: limited roof area but high daytime consumption, where 23.0% module efficiency converts directly into more installed capacity
- Large houses with long roof planes: if the plane accepts a full row of 2278 mm modules, this model beats using several shorter panels because there are fewer connections and less hardware
- Extensions to an existing array: rails and clamps for this frame size are widely available, so adding capacity rarely means redesigning the whole mounting structure
Summary
The JAM72D40 GB 595W is a dual-glass n-type TOPCon module that fits villa, hotel and commercial roofs in Phuket well, with up to 23.0% module efficiency, a −0.290 %/°C temperature coefficient and a 30-year linear output warranty per its datasheet. Good specifications still depend on correct string design, a properly matched inverter and sound mounting — which is where our engineers and installers do the work, including the PEA permits. For a roof-specific layout and yield estimate, or to understand the solar cost in Phuket, contact our team.
See other models from this brand on the JA Solar overview, or browse all the equipment we install.
Download the datasheet (PDF) — full manufacturer specification sheet