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JAM144D 820W–850W N-Type Bifacial Double Glass Solar Modules
Looking for a high-power solar module for your next project? Contact Jingsun to discuss the suitable power rating, technical documentation and project requirements.
Product Overview
The Jingsun JAM144D 820–850N Series is a bifacial double-glass photovoltaic module family built around 210mm N-type half-cut solar cells. The series offers rated power options from 820W to 850W, allowing project developers, EPC contractors, distributors and solar procurement teams to compare output classes within one product family.
Its half-cell configuration is designed to support high power output and improve module behaviour under relevant operating conditions. The bifacial construction can capture reflected light on the rear side when the installation layout and site conditions allow, while the double-glass design provides glass on both sides of the module.
For project selection, review the exact electrical characteristics of each power class alongside inverter limits, string design, mounting structure, site conditions and applicable local requirements.

Key Product Highlights
Up to 25.1% module efficiency
The 850W model is listed at a maximum module efficiency of 25.1% in the supplied datasheet.
210mm N-type half-cut cells
The module uses N-type 210mm half-cut cells in a 144-cell layout (6 × 24).
Bifacial double-glass construction
The module can generate power from front-side irradiance and, depending on installation conditions, rear-side irradiance.
Temperature coefficient of −0.260%/°C
Use the published Pmax temperature coefficient when modelling module output under cell temperatures different from STC.
1500V DC maximum system voltage
The datasheet lists a 1500V DC IEC maximum system voltage; final system design must comply with the module manual, inverter specifications and local codes.
15-year product warranty and 30-year power warranty
Warranty duration and coverage should be verified against the current formal warranty document supplied with the order.
Technical Specifications
The following values are transcribed from the supplied product datasheet. Confirm the latest approved datasheet before engineering design or purchase.
|
Parameter |
Specification |
|
Product series |
JAM144D 820–850N |
|
Module type |
Bifacial double-glass module |
|
Cell type |
N-type 210mm half-cut |
|
Cell layout |
144 cells (6 × 24) |
|
Rated power range |
820W–850W |
|
Maximum module efficiency |
Up to 25.1% (850W model) |
|
Dimensions |
2595 × 1303 × 33 mm (datasheet tolerance notation varies by drawing/specification) |
|
Weight |
40.9 kg ±3% |
|
Front glass |
2mm tempered coated glass |
|
Rear glass |
2mm tempered glass |
|
Maximum system voltage |
1500V DC (IEC) |
|
Operating temperature |
−40°C to +85°C |
|
Maximum series fuse |
35A |
|
Maximum test load |
Front: 5400Pa / Rear: 2400Pa |
|
Maximum design load |
Front: 3600Pa / Rear: 1600Pa |
|
Power tolerance |
0 to +5W |
|
Pmax temperature coefficient |
−0.260%/°C |
|
Voc temperature coefficient |
−0.250%/°C |
|
Isc temperature coefficient |
+0.048%/°C |
|
Bifaciality |
70% ±10% |
|
Junction box |
IP68 or higher as listed in datasheet; 3 diodes |
|
Connector |
PV-D01 or MC4-EVO 2A (1500V), subject to model/configuration |
|
Output cable |
Customizable length; refer to the approved configuration sheet |
|
Pallet quantity |
33 modules per pallet, as listed in datasheet |
|
Security class |
Class II |
Power Class Comparison
The supplied datasheet lists the following model ratings and module efficiencies at STC.
|
Model |
Rated Power |
Module Efficiency |
|
JAM144D-820 |
820W |
24.20% |
|
JAM144D-825 |
825W |
24.35% |
|
JAM144D-830 |
830W |
24.50% |
|
JAM144D-835 |
835W |
24.65% |
|
JAM144D-840 |
840W |
24.80% |
|
JAM144D-845 |
845W |
24.95% |
|
JAM144D-850 |
850W |
25.10% |

Bifacial Performance: What Project Designers Should Consider
A bifacial module can receive irradiance on both the front and rear surfaces. The amount of rear-side contribution is not a fixed percentage of total energy yield: it depends on factors such as ground albedo, mounting height, row spacing, tracker or fixed-tilt configuration, rear-side shading, terrain and local weather.
The supplied datasheet lists a bifaciality of 70% ±10%. Bifaciality describes the relationship between rear-side and front-side electrical response under defined test conditions; it should not be interpreted as a guaranteed 70% increase in plant energy production.
For a project-specific yield estimate, use the selected module's approved electrical data and an engineering model that reflects the site layout and environmental conditions. Request the current datasheet and any available validated test documentation from Jingsun before final design.
Temperature Performance and Mechanical Considerations
The JAM144D datasheet lists a Pmax temperature coefficient of −0.260%/°C. This value can be used in performance modelling to estimate how module maximum power changes as cell temperature moves away from the standard test condition of 25°C. Actual energy yield also depends on irradiance, wind, mounting configuration, inverter operation and other site variables.
The datasheet lists front/rear maximum test loads of 5400Pa/2400Pa and front/rear maximum design loads of 3600Pa/1600Pa. These values are not a substitute for project-specific structural engineering. Confirm mounting zones, clamp positions, wind and snow loads, installation orientation and the latest installation manual before deployment.
The half-cell layout is described in the supplied datasheet as supporting reduced shading effects, lower hot-spot risk and improved tolerance to mechanical loading. These are design-related benefits, not a guarantee that shading, hot spots or module damage cannot occur.

Typical Applications
Utility-scale ground-mounted solar power plants.
Large solar farm projects where high module power is relevant to system layout and balance-of-system design.
Bifacial installations with suitable ground reflectivity, mounting geometry and rear-side clearance.
Commercial or industrial projects only where module dimensions, weight, structural design and electrical configuration are appropriate.
Projects requiring engineering review of 1500V DC system architecture, subject to applicable regulations and equipment compatibility.
System Design and Compatibility
Before finalizing the module selection, project designers should check the following items against the exact selected model and the complete system design:
Inverter maximum DC voltage and MPPT operating voltage range.
Cold-condition string open-circuit voltage and hot-condition operating voltage.
String current, short-circuit current, parallel string count and fuse requirements.
Module dimensions, weight, clamp zones, mounting orientation and structural loading.
Connector type, cable length, cable routing and electrical compatibility.
Local grid, electrical, fire-safety, transport and installation requirements.
The datasheet includes model-specific electrical parameters at STC and BNPI. Use the complete, current datasheet for detailed design; do not estimate string size from rated wattage alone.
Bulk Supply and Customization
Jingsun can discuss project requirements for the JAM144D 820–850N Series, including selection of the required power class and available configuration options. The supplied datasheet notes that frame colour and cable length can be customized upon request, subject to confirmation for the specific order.
For a quotation, share the target quantity, delivery destination, preferred power rating, project type, expected delivery schedule and any required certification or documentation. Jingsun can then confirm availability, configuration, packaging, lead time and commercial terms for the requested order.

FAQ
Q: What power ratings are available in the JAM144D series?
A: The supplied datasheet lists JAM144D models from 820W to 850W in 5W increments: 820W, 825W, 830W, 835W, 840W, 845W and 850W.
Q: What is the maximum efficiency of the JAM144D 850W solar module?
A: The supplied datasheet lists a maximum module efficiency of 25.1% for the JAM144D-850 model. The listed efficiencies vary by power rating.
Q: Is the JAM144D series a bifacial solar module?
A: Yes. The supplied product brochure identifies the series as a bifacial double-glass module and lists bifaciality at 70% ±10%. Actual rear-side energy contribution depends on installation and site conditions.
Q: What is the maximum system voltage?
A: The datasheet lists a maximum system voltage of 1500V DC (IEC). The final design must follow the approved module documentation, inverter limits and applicable local requirements.
Q: What are the module dimensions and weight?
A: The brochure lists dimensions of approximately 2595 × 1303 × 33mm and a weight of 40.9kg ±3%. Confirm dimensional tolerances and the exact configuration against the current drawing.
Q: What is the temperature coefficient of maximum power?
A: The datasheet lists the Pmax temperature coefficient as −0.260%/°C. Use this value with the full electrical data and site conditions for performance modelling.
Q: What warranty is offered?
A: The supplied brochure states a 15-year product warranty and a 30-year power warranty. Request the formal warranty document for exact coverage and conditions.
Q: Can the frame colour or cable length be customized?
A: The supplied brochure says customized frame colour and cable length are available upon request. Availability should be confirmed for the selected model and order.
Q: How can I request a quotation for a solar project?
A: Contact Jingsun with your required power rating, quantity, delivery destination, project type and expected schedule. The sales team can confirm technical suitability, availability and commercial terms.
Q: Does the datasheet confirm TOPCon technology?
A: The supplied datasheet identifies the module as N-type, but the provided text does not explicitly confirm TOPCon. Request the current approved technical datasheet if TOPCon technology designation is a procurement requirement.

Final Call to Action
Planning a utility-scale or large commercial solar project? Share your target capacity, project location, required module power and delivery schedule with Jingsun. Our team can help you review the relevant product documentation and prepare a quotation based on your project requirements.
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