Tongwei Solar TWMNF-66HD715W
Tongwei Solar TWMNF-66HD715W
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Tongwei Solar TWMNF-66HD715W

Tongwei Solar TWMNF-66HD715W

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Specifications

Power Rating 715W

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What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

What’s covered by your return policy?

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.

How long will it take to receive my order?

All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Portlandia Electric Supply equipment, we’ve got you covered: we’re always only a phone call or email away.

Tongwei TWMNF-66HD715W 705–725W N-Type Bifacial Monocrystalline Solar Panel

Model TWMNF-66HD715W | N-Type TOPCon Half-Cell | 132 Half-Cells | Bifacial Glass-Glass | 1500V System Voltage

715 W
Max Power Output
23.0%
Module Efficiency
132
N-Type TOPCon

Product Overview

The Tongwei Solar TWMNF-66HD715W N-type bifacial monocrystalline solar panel delivers up to 715 W of high-efficiency power for utility-scale plants and large commercial rooftops. Its advanced N-type TOPCon half-cell design and bifacial glass-glass construction support higher yields and lower levelized cost of energy across the full 705–725 W power range. This module achieves up to 23.0% front-side efficiency at standard test conditions, with rear-side generation further boosting output in reflective environments. A robust 12-year product warranty and 30-year linear power warranty, combined with a low 0.42% annual degradation rate, ensure reliable long-term performance. With a maximum system voltage of 1500 V, 132 half-cells, and durable dual-glass construction, this panel is engineered for demanding environments and professional solar projects that require stable, bankable energy output.

Key Benefits

Ultra-high power density: Each module delivers up to 715 W of power, reducing required panel count on large systems and helping designers optimize space constrained commercial roofs and ground-mount arrays.

Advanced N-type TOPCon cells: N-type half-cells limit light-induced degradation and support higher efficiency, enabling stronger performance over time compared with many conventional P-type modules.

Bifacial glass-glass design: Energy is harvested from both front and rear surfaces, increasing yield on highly reflective surfaces such as light concrete, white membranes, and snow-covered ground.

Long-term reliability and low degradation: With 99% power retained in year one and 87.4% after 30 years, the panel provides predictable long-horizon output for investors and asset owners.

Robust mechanical performance: Dual 2 mm glass, anodized aluminium frame, and IP68 junction box combine to deliver high resistance to moisture, dust, and mechanical loads in challenging field conditions.

1500 V system compatibility: High system voltage capability allows longer strings, reduced cabling, and lower balance-of-system costs in large-scale solar installations.

How It Works

This N-type bifacial monocrystalline module converts sunlight into clean DC electricity using high-efficiency TOPCon half-cells encapsulated between dual glass layers. Front-side irradiance is captured first, where the 132 half-cells operate at an optimum balance between current and voltage to deliver up to 715 W at around 40.86 V and 17.5 A. At the same time, reflected and diffuse light striking the rear glass is absorbed by the cell rear surfaces, increasing overall generation without expanding the footprint. The module is wired into strings that operate up to 1500 V, then connected to inverters that convert the DC energy to usable AC power for onsite consumption or export to the grid. Carefully engineered temperature coefficients, durable materials, and a low degradation profile help maintain strong performance across a wide climate range from -40°C to 85°C.

N-Type TOPCon half-cell conversion: Sunlight enters through the 2 mm anti-reflection coated front glass, where N-type TOPCon cells absorb photons and generate charge carriers within the silicon structure. Half-cut cell architecture reduces resistive losses and improves shade tolerance by splitting each cell, which helps maintain higher string output under real-world operating conditions.

Bifacial rear-side gain: The rear 2 mm semi-tempered glass allows additional light to pass through and reflect onto the rear of the cells, where bifaciality raises total energy yield relative to monofacial modules. This effect is especially valuable over bright surfaces or in utility-scale ground-mount arrays, where site design can be optimized to maximize rear-side irradiance and system performance.

Thermal and electrical stability: The module maintains output across temperature changes using low temperature coefficients of -0.28%/°C for Pmax and -0.24%/°C for Voc, limiting performance loss in hot climates. An IP68 junction box with three bypass diodes and 4 mm² cables with 1400 mm length support secure, low-resistance connections while protecting the cells from hotspot damage during partial shading events.

Technical Specifications

Brand / Manufacturer Tongwei Co., Ltd. (TW Solar)
Module Type / Model Number N-type Half-cell Bifacial Module (66), TWMNF-66HD715W
Cell Technology N-type TOPCon monocrystalline half-cells (TNC)
Cell Count & Orientation 132 half-cells, 6 × 22 layout
Nominal Power Range 705 Wp – 725 Wp
Maximum Power (Pmax) 715 Wp (STC)
Module Efficiency (Front Side) 23.0% typical, 22.7–23.3% range across series
Power Tolerance 0 ~ +3%
Open-Circuit Voltage (Voc) 49.11 V (at 715 W type)
Short-Circuit Current (Isc) 18.5 A (at 715 W type)
Voltage at Maximum Power (Vmpp) 40.86 V
Current at Maximum Power (Impp) 17.5 A
Bifacial Technology Bifacial glass-glass, rear-side gain with 80 ± 5% bifaciality
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
Panel Dimensions (H × W × D) 2384 × 1303 × 33 mm
Weight 37.9 kg
Front Glass 2.0 mm AR coating semi-tempered glass
Rear Glass 2.0 mm semi-tempered glass
Frame Material Anodized aluminium alloy frame
Junction Box IP68 rated, 3 bypass diodes
Cable Cross-section 4 mm² output cables
Cable Length 1400 mm (standard), customizable lengths available
Country of Origin China

Certifications & Compliance

Certifications: IEC 61215, IEC 61730, IEC TS 62804, IEC 61701, IEC 62716, IEC 60068-2-68, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, ISO 50001:2018, IEC 62941 quality system for PV module manufacturing.
Inverter Compatibility: Designed for modern 1500 V utility-scale and commercial inverters, compatible with leading string and central inverter platforms when configured within voltage and current limits.
Environmental: Dual-glass, PID-resistant N-type design tested for salt mist, ammonia, and sand, suitable for coastal, agricultural, and desert environments when installed to manufacturer guidelines.
Warranty: 12-year product and workmanship warranty, plus 30-year linear power output warranty with 99% power in year one and 87.4% remaining at year thirty, based on a 0.42% annual degradation rate after the first year.

Documentation

Product Datasheet (PDF)

● Available | Contact us for lead time and pricing

Customer Reviews

Be the first to write a review
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What is your return policy?

Returns are free in the first 30 days with no restocking or processing fees, although the customer may be responsible for paying return shipping. See our complete return policy on our Shipping, Delivery, and Returns page linked in the footer of this website.

What’s covered by your return policy?

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.

How long will it take to receive my order?

All orders are processed within 72 hours and you can expect delivery on most orders within 5-7 business days. You will receive access to our customer portal after ordering, where it is easy to track all your shipments. See our Shipping, Delivery and Returns page for more details.

What are your financing and payment options?

We offer several ways to pay to make getting your solar kit simple:

Credit Card: if the purchase is greater than your card’s limit, you can split the cost onto multiple cards as well as Paypal, financing through Affirm, and ACH/bank transfer

You can arrange financing during the checkout process, or scroll further down this page for more details. Please note, if you'd like to finance your order, you can do so instantly, right at checkout.

How does your Lifetime Customer Support work?

Our legendary lifetime customer support has helped make us the #1 online solar retailer! We have a dedicated team of solar professionals standing by to help you navigate the world of solar with ease. From selecting the perfect solar kit to installation and beyond, we provide support and expertise at every step of the journey.If you need help with ordering, shipping, troubleshooting, expanding your system, warranty issues, or anything else you have questions about for as long as you own your Portlandia Electric Supply equipment, we’ve got you covered: we’re always only a phone call or email away.

Tongwei TWMNF-66HD715W 705–725W N-Type Bifacial Monocrystalline Solar Panel

Model TWMNF-66HD715W | N-Type TOPCon Half-Cell | 132 Half-Cells | Bifacial Glass-Glass | 1500V System Voltage

715 W
Max Power Output
23.0%
Module Efficiency
132
N-Type TOPCon

Product Overview

The Tongwei Solar TWMNF-66HD715W N-type bifacial monocrystalline solar panel delivers up to 715 W of high-efficiency power for utility-scale plants and large commercial rooftops. Its advanced N-type TOPCon half-cell design and bifacial glass-glass construction support higher yields and lower levelized cost of energy across the full 705–725 W power range. This module achieves up to 23.0% front-side efficiency at standard test conditions, with rear-side generation further boosting output in reflective environments. A robust 12-year product warranty and 30-year linear power warranty, combined with a low 0.42% annual degradation rate, ensure reliable long-term performance. With a maximum system voltage of 1500 V, 132 half-cells, and durable dual-glass construction, this panel is engineered for demanding environments and professional solar projects that require stable, bankable energy output.

Key Benefits

Ultra-high power density: Each module delivers up to 715 W of power, reducing required panel count on large systems and helping designers optimize space constrained commercial roofs and ground-mount arrays.

Advanced N-type TOPCon cells: N-type half-cells limit light-induced degradation and support higher efficiency, enabling stronger performance over time compared with many conventional P-type modules.

Bifacial glass-glass design: Energy is harvested from both front and rear surfaces, increasing yield on highly reflective surfaces such as light concrete, white membranes, and snow-covered ground.

Long-term reliability and low degradation: With 99% power retained in year one and 87.4% after 30 years, the panel provides predictable long-horizon output for investors and asset owners.

Robust mechanical performance: Dual 2 mm glass, anodized aluminium frame, and IP68 junction box combine to deliver high resistance to moisture, dust, and mechanical loads in challenging field conditions.

1500 V system compatibility: High system voltage capability allows longer strings, reduced cabling, and lower balance-of-system costs in large-scale solar installations.

How It Works

This N-type bifacial monocrystalline module converts sunlight into clean DC electricity using high-efficiency TOPCon half-cells encapsulated between dual glass layers. Front-side irradiance is captured first, where the 132 half-cells operate at an optimum balance between current and voltage to deliver up to 715 W at around 40.86 V and 17.5 A. At the same time, reflected and diffuse light striking the rear glass is absorbed by the cell rear surfaces, increasing overall generation without expanding the footprint. The module is wired into strings that operate up to 1500 V, then connected to inverters that convert the DC energy to usable AC power for onsite consumption or export to the grid. Carefully engineered temperature coefficients, durable materials, and a low degradation profile help maintain strong performance across a wide climate range from -40°C to 85°C.

N-Type TOPCon half-cell conversion: Sunlight enters through the 2 mm anti-reflection coated front glass, where N-type TOPCon cells absorb photons and generate charge carriers within the silicon structure. Half-cut cell architecture reduces resistive losses and improves shade tolerance by splitting each cell, which helps maintain higher string output under real-world operating conditions.

Bifacial rear-side gain: The rear 2 mm semi-tempered glass allows additional light to pass through and reflect onto the rear of the cells, where bifaciality raises total energy yield relative to monofacial modules. This effect is especially valuable over bright surfaces or in utility-scale ground-mount arrays, where site design can be optimized to maximize rear-side irradiance and system performance.

Thermal and electrical stability: The module maintains output across temperature changes using low temperature coefficients of -0.28%/°C for Pmax and -0.24%/°C for Voc, limiting performance loss in hot climates. An IP68 junction box with three bypass diodes and 4 mm² cables with 1400 mm length support secure, low-resistance connections while protecting the cells from hotspot damage during partial shading events.

Technical Specifications

Brand / Manufacturer Tongwei Co., Ltd. (TW Solar)
Module Type / Model Number N-type Half-cell Bifacial Module (66), TWMNF-66HD715W
Cell Technology N-type TOPCon monocrystalline half-cells (TNC)
Cell Count & Orientation 132 half-cells, 6 × 22 layout
Nominal Power Range 705 Wp – 725 Wp
Maximum Power (Pmax) 715 Wp (STC)
Module Efficiency (Front Side) 23.0% typical, 22.7–23.3% range across series
Power Tolerance 0 ~ +3%
Open-Circuit Voltage (Voc) 49.11 V (at 715 W type)
Short-Circuit Current (Isc) 18.5 A (at 715 W type)
Voltage at Maximum Power (Vmpp) 40.86 V
Current at Maximum Power (Impp) 17.5 A
Bifacial Technology Bifacial glass-glass, rear-side gain with 80 ± 5% bifaciality
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
Panel Dimensions (H × W × D) 2384 × 1303 × 33 mm
Weight 37.9 kg
Front Glass 2.0 mm AR coating semi-tempered glass
Rear Glass 2.0 mm semi-tempered glass
Frame Material Anodized aluminium alloy frame
Junction Box IP68 rated, 3 bypass diodes
Cable Cross-section 4 mm² output cables
Cable Length 1400 mm (standard), customizable lengths available
Country of Origin China

Certifications & Compliance

Certifications: IEC 61215, IEC 61730, IEC TS 62804, IEC 61701, IEC 62716, IEC 60068-2-68, ISO 9001:2015, ISO 14001:2015, ISO 45001:2018, ISO 50001:2018, IEC 62941 quality system for PV module manufacturing.
Inverter Compatibility: Designed for modern 1500 V utility-scale and commercial inverters, compatible with leading string and central inverter platforms when configured within voltage and current limits.
Environmental: Dual-glass, PID-resistant N-type design tested for salt mist, ammonia, and sand, suitable for coastal, agricultural, and desert environments when installed to manufacturer guidelines.
Warranty: 12-year product and workmanship warranty, plus 30-year linear power output warranty with 99% power in year one and 87.4% remaining at year thirty, based on a 0.42% annual degradation rate after the first year.

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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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

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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