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REC REC620AA Pro MG 620W Bifacial HJT Monocrystalline Solar Panel
Model REC620AA Pro MG | Bifacial HJT | 120 Half-Cut Cells | Bifacial | 1500V System Voltage
Product Overview
The REC REC620AA Pro MG 620W bifacial HJT monocrystalline solar panel is engineered for high performance in demanding commercial and industrial projects. This premium module combines heterojunction cell technology with a bifacial design to capture more light from both sides. System owners gain strong energy yield from a compact footprint thanks to the panel’s impressive 21.8% efficiency rating. The module features 120 half-cut REC bifacial heterojunction cells, which help reduce internal resistance and improve real‑world performance. With a maximum system voltage of 1500 V, the REC620AA Pro MG integrates smoothly into large-scale arrays and utility style designs. Its robust glass‑glass construction, anodized aluminum frame, and IP68 rated junction box support reliable operation in harsh climates. The REC Alpha Pro MG Series is manufactured in Singapore under strict quality control for consistent long term performance. This panel is an excellent choice where space is limited but high power density and dependable output are required. Long warranties on product and power retention provide additional confidence for asset owners and investors.
Key Benefits
High power density for limited roof space: Each module delivers up to 620 Wp, allowing more energy from fewer panels on constrained roofs or ground arrays.
Advanced bifacial HJT technology: Heterojunction cells and a bifacial glass design capture direct and reflected light, improving annual energy yield.
Excellent long term performance: A low 0.31% annual degradation rate supports strong output, helping protect project returns for decades.
Robust mechanical design: Thick dual 2 mm solar glass, anodized aluminum framing, and IP68 junction boxes withstand harsh weather and handling.
Streamlined high voltage system design: The 1500 V maximum system voltage supports longer strings, which can reduce BOS costs and simplify layouts.
How It Works
The REC REC620AA Pro MG solar panel converts sunlight into usable electrical power using high efficiency bifacial heterojunction cells. These cells combine crystalline silicon with thin amorphous silicon layers to increase light capture and reduce electrical losses. When sunlight hits the front or reflected light reaches the rear, photons are absorbed and generate charge carriers within the cell structure. The panel’s internal wiring and half‑cut cell layout guide this current efficiently to the module terminals. Once connected in a string, multiple panels feed direct current into an inverter, which converts it to alternating current for loads or export. The module has been optimized to perform in real outdoor conditions across a wide operating temperature range. Stable performance is maintained through precise temperature coefficients and robust materials that protect the cells from environmental stress.
Bifacial light harvesting: Front and rear glass surfaces allow the cell matrix to receive light from both directions. Reflected irradiation from bright surfaces or nearby structures can be utilized to increase total energy generation without enlarging the array footprint.
Heterojunction cell structure: Each cell uses a crystalline silicon wafer combined with thin amorphous silicon layers. This structure reduces recombination losses, keeps voltage high, and enables strong performance even at elevated module temperatures.
Half-cut and high voltage system design: The 120 half‑cut cells lower resistive losses and improve shade tolerance within the module. A 1500 V system rating then allows longer strings, so installers can use fewer home runs and optimize inverter loading.
Technical Specifications
| Module Type | Monocrystalline bifacial heterojunction (HJT) |
| Model Number | REC620AA Pro MG |
| Manufacturer | REC Solar Pte. Ltd., Singapore |
| Power Range | 590 Wp to 640 Wp (Alpha Pro MG Series) |
| Maximum Power (Pmax) STC | 620 Wp (front side, standard test conditions) |
| Module Efficiency Range | 20.8% to 22.5% series range, 21.8% for 620 Wp unit |
| Voltage at Maximum Power (Vmpp) 620 Wp | 36.6 V |
| Current at Maximum Power (Impp) 620 Wp | 16.94 A |
| Open Circuit Voltage (Voc) 620 Wp | 44.6 V |
| Short Circuit Current (Isc) 620 Wp | 17.67 A |
| Secondary Pmax Rating | 469 Wp with Vmpp 34.3 V, Impp 13.69 A, Voc 41.8 V, Isc 14.28 A |
| Power Tolerance | -3% to +3% within one watt class |
| Annual Power Degradation Rate | 0.31% per year, 90.75% power after 30 years (typical) |
| Nominal Module Operating Temperature (NMOT) | 44 °C ± 2 °C |
| Operating Temperature Range | -40 °C to +85 °C |
| Temperature Coefficient of Pmax | -0.24% per °C |
| Temperature Coefficient of Voc | -0.23% per °C |
| Temperature Coefficient of Isc | +0.04% per °C |
| Maximum System Voltage | 1500 V DC (IEC) |
| Maximum Series Fuse Rating | 35 A, max reverse current 35 A |
| Mechanical Dimensions (H × W × D) | 2175 mm × 1305 mm × 30 mm (approx. 2.84 m²) |
| Panel Weight | 36.8 kg |
| Cell Count and Type | 120 half-cut REC bifacial heterojunction cells, bifaciality >86% |
| Front Glass | 2 mm solar glass with anti-reflective surface treatment |
| Rear Glass | 2 mm solar glass with white grid pattern |
| Frame Material and Color | Anodized aluminum frame, silver finish |
| Junction Box | 3-part box with 3 bypass diodes, lead free, IP68 rated |
| Cable and Connectors | 4 mm² solar cable, 0.3 m + 0.3 m; Jiaming Tianheyuan PV-JM608 connectors, IP68 when mated |
| Maximum Test Load (Front / Rear) | +5400 Pa front (551 kg/m²), -2400 Pa rear (245 kg/m²) test load |
Certifications & Compliance
Certifications: Designed and tested in accordance with IEC standards for crystalline PV modules, including IEC 61215 and IEC 61730, with junction box and connector compliance to IEC 62790 and IEC 62852 respectively.
Inverter Compatibility: Suitable for most modern transformerless and transformer-based string or central inverters rated for 1500 V DC inputs, when string design follows manufacturer guidelines for voltage and current limits.
Environmental: Glass-glass construction and IP68 junction box support high resistance to moisture, dust, and mechanical stress, making the module fit for coastal, desert, and high snow load environments when installed as directed.
Warranty: Product warranty up to 30 years and power warranty up to 30 years, with a total degradation of approximately 90.75% remaining power at year 30 as indicated for the REC Alpha Pro MG series, subject to REC warranty terms and installation by qualified professionals.
Documentation
Product Datasheet (PDF)● Available | Contact us for lead time and pricing
| SKU | PES-SPS-SOL-14939 |
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| Manufacturer | PES Supply |
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