What is the CS6.2-66TB-620?
- Peak power: 620 Wp front side (595–620 W range), rising to 744 W at the 20% bifacial gain quoted in the datasheet
- Bifaciality: 80% (±5%) — the rear face can contribute up to about 80% of front-side capability in favourable conditions
- Construction: 2.0 mm heat-strengthened glass both sides (anti-reflective front), 132 cells [2 × (11 × 6)]
- Electrical and efficiency: Vmp 41.2 V, Imp 15.06 A, Voc 48.4 V, Isc 15.88 A, 23.0% efficiency, Pmax −0.29%/°C
- Size and warranty: 2382 × 1134 × 30 mm, 33.6 kg, 12-year product and 30-year performance warranty
The Canadian Solar TOPBiHiKu6 CS6.2-66TB is a bifacial dual-glass module rated 620 W on the front face, which the datasheet quotes as reaching 744 W at a 20% bifacial gain. Instead of an opaque backsheet the rear is glass, so the cells also convert light reflected from the surface below. What you actually gain depends far more on the installation than on the datasheet figure.
Where does a Canadian Solar bifacial module make sense in Phuket?
The 80% bifaciality figure describes the rear cells' capability relative to the front under test conditions, not the energy uplift on a given site. That is why the datasheet illustrates output at a 20% bifacial gain — a level achievable when the surface beneath reflects well and the array sits high enough above it. Real projects vary widely. In Phuket, bifacial modules pay off clearly on elevated structures: steel frames over light-coloured concrete decks, carports, or factory roofs with a genuine air gap. On arrays mounted close to dark metal sheet — the majority of island installations — rear-side gain is minimal. The other practical consideration is handling: at 33.6 kg and 2382 mm, structural capacity and lifting logistics need checking before work starts.
Highlights from the datasheet
- Up to 744 W combined: at the 20% bifacial gain quoted by the manufacturer, delivering high capacity per square metre where the site suits it
- 2.0 mm heat-strengthened glass both sides: better long-term resistance to moisture and UV than polymer backsheets in hot, humid service
- 80% (±5%) bifaciality: at the higher end for bifacial modules on the market
- 23.0% front-side efficiency: already strong before any rear-side contribution
- −0.29%/°C temperature coefficient: the same heat behaviour as the monofacial models in the family
- 1500 V system voltage: supports long strings on commercial systems, reducing string count and cabling work
- 30-year linear performance warranty: 1% maximum first-year degradation, 0.4% per year thereafter
Key specifications (CS6.2-66TB-620)
| Specification | Datasheet value |
|---|---|
| Nominal Max. Power (Pmax) at STC | 620 W (ช่วงรุ่นในเอกสาร 595–620 W) |
| Module Efficiency | 23.0 % |
| Cell Type | TOPCon cells (N-type, Bifacial) |
| Cell Arrangement | 132 เซลล์ [2 x (11 x 6)] |
| Opt. Operating Voltage / Current (Vmp / Imp) | 41.2 V / 15.06 A |
| Open Circuit Voltage / Short Circuit Current (Voc / Isc) | 48.4 V / 15.88 A |
| Power Bifaciality | 80 % (ความคลาดเคลื่อน ±5 %) เอกสารระบุกำลังผลิตเมื่อได้ bifacial gain 20% เท่ากับ 744 W |
| Temperature Coefficient (Pmax) | -0.29 % / °C |
| Temperature Coefficient (Voc / Isc) | -0.25 % / °C และ 0.05 % / °C |
| Dimensions | 2382 × 1134 × 30 mm |
| Weight | 33.6 kg |
| Wind Load / Snow Load | ลม 2400 Pa / หิมะ 5400 Pa |
| Product Warranty / Linear Power Performance Warranty | 12 ปี / 30 ปี |
| First-year / Annual Power Degradation | ปีแรกไม่เกิน 1% ปีถัดไปไม่เกิน 0.4% ต่อปี |
| Front & Back Glass / Max. System Voltage / Operating Temperature | กระจก heat strengthened 2.0 mm ทั้งสองด้าน (หน้าเคลือบกันสะท้อน) / 1500 V (IEC/UL) / -40°C ~ +85°C |
Note: every figure above comes straight from the Canadian Solar Inc. (ธุรกิจโมดูลดำเนินการผ่านบริษัทลูก CSI Solar Co., Ltd. ซึ่งเป็นผู้ออก datasheet ทุกฉบับ) datasheet. Actual system design (strings per MPPT, cable sizing, breakers) must be calculated for each site.
Why this model suits Phuket
- Well suited to carports and elevated frames: the format Phuket hotels and factories use to make parking areas productive — and where bifacial genuinely pays
- High humidity nearly year-round: glass-glass construction reduces the moisture-ingress risk polymer backsheets face over decades
- Structure must be verified: 33.6 kg per module at 2.38 metres requires load checks and a safe lifting plan
- Coastal salt air: the aluminium frame copes reasonably, and on seafront work we specify stainless fixings throughout as standard
Who it suits
- Carports and elevated steel frames: with open space beneath for reflected light
- Light-coloured concrete roof decks: bright surfaces that genuinely feed the rear face
- Large factories and warehouses: structures able to carry the weight while maximising capacity per square metre
- Long-horizon installations: glass-glass construction ages better in hot, humid conditions
- 1500 V commercial systems: where long strings reduce cabling and combiner work
Summary
The TOPBiHiKu6 CS6.2-66TB 620W suits carports, elevated frames and roofs with bright surfaces beneath — the conditions under which rear-side generation is real. For the more common Phuket case of modules mounted close to dark metal roofing, the monofacial CS6.2-54TM 520W usually returns more per baht: lighter, cheaper and simpler to install.
See other models from this brand on the Canadian Solar overview, or browse all the equipment we install.
Download the datasheet (PDF) — full manufacturer specification sheet