Tongwei Solar TWMNF-66HD720W
Tongwei Solar TWMNF-66HD720W
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Tongwei Solar TWMNF-66HD720W

Tongwei Solar TWMNF-66HD720W

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Power Rating 720W

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Our returns policy covers all purchases made through Portlandia Electric Supply. For warranty issues, as authorized distributors, we honor the full manufacturer warranty of ALL the brands on our website. See our complete returns and warranty policies on our Shipping, Deliver, and Returns page.

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Tongwei TWMNF-66HD720W N-Type Bifacial Monocrystalline Solar Panel

Model TWMNF-66HD720W | N-Type TOPCon Half-Cell | 132 Half-Cell | Bifacial Glass-Glass | 1500V System Voltage

720 W
Max Power Output
23.2 %
Module Efficiency
132
N-Type TOPCon

Product Overview

The Tongwei Solar TWMNF-66HD720W N-type bifacial monocrystalline solar panel delivers high power density for modern commercial and utility plants. With a rated maximum output of 720 W and module efficiency up to 23.2%, it is engineered to extract more energy from each square meter of roof or ground space. N-type TOPCon half-cells are combined with a robust dual-glass, bifacial design that captures light from both front and rear sides. This approach supports higher yields on reflective surfaces such as white roofs, light gravel, concrete or snow. A low temperature coefficient of power helps the module maintain performance in hot climates and during peak irradiance hours. The glass‑glass build, anodized aluminum frame and IP68 junction box offer long-term durability in harsh environments, including coastal and dusty regions. Backed by a 12‑year product warranty and a 30‑year linear power output warranty, this panel is suited for C&I rooftops and utility‑scale solar plants seeking bankable, long‑life energy production.

Key Benefits

High power density: A 720 W output and up to 23.2% efficiency allow more energy from fewer modules, helping reduce racking, cabling and installation time per kilowatt installed.

Advanced N-type TOPCon cells: N-type TOPCon half-cells offer lower degradation and better low-light response than many conventional P-type modules, supporting stable production over the full project life.

Bifacial glass-glass design: Dual glass and up to 80±5% bifaciality enable rear-side gain on reflective ground or roof surfaces, improving specific energy yield without increasing array footprint.

Robust performance in extreme climates: A power temperature coefficient of -0.28%/°C, operating range from -40°C to 85°C and wind and snow load ratings up to 5,400 Pa support reliable output in hot, cold and high-wind regions.

Long-term bankable warranty: A 12-year material and workmanship warranty is paired with a 30-year linear power warranty, with 99% output in year one and 87.4% expected at year 30, supporting project bankability.

How It Works

This N-type bifacial solar module converts sunlight into clean DC electricity using advanced TOPCon monocrystalline cells. Each half-cell is wired in an optimized layout that reduces resistive losses, improves shade tolerance and lowers operating temperatures. The module harvests light on both sides through its glass-glass construction, so energy is captured from direct irradiation and reflected or diffuse light. When stringed together, panels feed DC power to an inverter that converts it into AC electricity for on-site use or export to the grid. The low degradation profile and stable temperature behavior help system owners forecast yield and calculate levelized cost of energy more accurately. This makes the module an efficient building block for commercial rooftops, carports, agrivoltaic systems and utility-scale solar farms.

N-type TOPCon half-cell conversion: High-efficiency N-type TOPCon cells use a passivated contact structure that limits recombination losses. This design helps deliver higher efficiency and better low-light performance compared with many PERC-based alternatives.

Bifacial glass-glass energy capture: Front 2.0 mm AR-coated semi-tempered glass maximizes direct irradiance capture, while rear 2.0 mm glass collects reflected light from the ground or roof. When installed over bright surfaces at suitable tilt and height, rear-side gain can significantly boost annual energy yield.

System integration and protection: A 1500 V DC system voltage rating supports long strings and lowers BOS costs in large plants. The IP68 junction box with three bypass diodes helps protect the module under partial shading and damp conditions, while an anodized aluminum frame and dual-glass build enhance mechanical strength and reduce long-term moisture ingress.

Technical Specifications

Brand / Manufacturer Tongwei Co., Ltd. (TW Solar), China
Model Number TWMNF-66HD720W
Technology / Cell Type N-type TOPCon monocrystalline, half-cell, bifacial glass-glass module
Power Range 705 Wp to 725 Wp (nominal 720 Wp)
Maximum Power (Pmax) 720 Wp at STC
Module Efficiency 23.2% typical (22.7% – 23.3% range)
Power Tolerance 0 to +3%
Voltage at Maximum Power (Vmpp) 41.03 V
Current at Maximum Power (Impp) 17.55 A
Open-Circuit Voltage (Voc) 49.28 V
Short-Circuit Current (Isc) 18.55 A
Bifaciality 80 ± 5% rear-side relative to front
Operating Temperature Range -40°C to +85°C
Temperature Coefficient of Pmax -0.28% / °C
Temperature Coefficient of Voc -0.24% / °C
Temperature Coefficient of Isc +0.046% / °C
Maximum System Voltage 1500 V DC
Maximum Series Fuse Rating 35 A
Product Type / Application C&I rooftops and utility-scale PV plants
Panel Dimensions (H × W × D) 2384 × 1303 × 33 mm
Weight 37.9 kg
Cell Configuration 132 cells (6 × 22) half-cell layout
Front Glass 2.0 mm AR-coated semi-tempered glass
Rear Glass 2.0 mm semi-tempered glass
Frame Type Anodized aluminum alloy frame
Junction Box IP68 protection, 3 bypass diodes
Cable Cross-Section 4.0 mm² solar cable
Cable Length ±1400 mm (other lengths configurable by manufacturer)
Static Load Rating 5,400 Pa front, 2,400 Pa rear (test load)
Packaging 33 modules per pallet, 594 modules per 40'HC container

Certifications & Compliance

Certifications: ISO 9001:2015 Quality Management, ISO 14001:2015 Environmental Management, ISO 45001:2018 Occupational Health and Safety, ISO 50001:2018 Energy Management, EC 62941:2019 PV Module Manufacturing Quality System, IEC 61215, IEC 61730, IEC TS 62804, IEC 61701, IEC 62716, IEC 60068-2-68.
Inverter Compatibility: Designed for modern 1500 V string and central inverters; compatible with leading C&I and utility-scale inverter brands when string and voltage limits are respected.
Environmental: Dual-glass construction, IP68 junction box and corrosion-resistant materials support reliable operation in coastal, desert and high-humidity environments when installed to manufacturer guidelines.
Warranty: 12-year material and workmanship warranty plus 30-year linear power output warranty with 1% maximum degradation in year one and a 0.4% annual degradation rate thereafter, targeting 87.4% of initial power at year 30.

Documentation

Product Datasheet (PDF)

● Available | Contact us for lead time and pricing

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Customer Success Stories

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

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Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

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