Tongwei Solar TWMNF-66HD705W
Tongwei Solar TWMNF-66HD705W
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Tongwei Solar TWMNF-66HD705W

Tongwei Solar TWMNF-66HD705W

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Specifications

Power Rating 705W

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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.

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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.

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.

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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.

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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-66HD705W N-Type Bifacial Monocrystalline Solar Panel

Model TWMNF-66HD705W | N-Type Bifacial Half-Cell | 132 Half-Cell TNC | Bifacial | 1500V System Voltage

705 W
Max Power Output
22.7%
Module Efficiency
132
N-Type TOPCon

Product Overview

The Tongwei Solar TWMNF-66HD705W N-type bifacial monocrystalline solar panel delivers very high power in a single module. This high efficiency panel is designed for commercial rooftops and utility scale solar plants that demand maximum energy density. With a rated output of 705 watts and module efficiency of 22.7 percent, it allows more power to be installed on every project footprint. Its advanced N-type half cell technology reduces degradation and supports strong performance over decades of operation. Both sides of the bifacial module harvest sunlight, increasing energy yield on suitable mounting surfaces. A robust anodized aluminium frame, dual glass construction and IP68 junction box provide long term durability in harsh outdoor environments. The TWMNF-66HD705W solar panel is built by Tongwei Co., Ltd. in China, a leading global cell and module manufacturer. It is an ideal choice where lower levelized cost of energy and reliable field performance are key project goals.

Key Benefits

Ultra high power density: Each module delivers up to 705 watts, reducing module count on large arrays. This helps simplify system design and can lower balance of system costs on ground mounted and commercial rooftop projects.

Advanced N-type cell technology: N-type half cells reduce light induced degradation and support a very low annual power loss. This improves long term energy production and supports stronger project returns over the full warranty period.

Bifacial energy gain: The bifacial design captures light from the front and rear of the module for higher yield. On reflective surfaces, rear side generation can significantly increase total kilowatt hours per installed watt.

Robust mechanical design: Semi tempered dual glass, a strong anodized aluminium frame and an IP68 junction box support reliable field operation. The module is engineered to withstand demanding outdoor conditions over many years.

Long term warranty protection: A 12 year product warranty is supported by a 30 year linear power output warranty. Degradation is limited to about 1 percent in year one and 0.4 percent per year thereafter, reaching 87.4 percent output at year thirty.

How It Works

The Tongwei TWMNF-66HD705W solar panel converts sunlight into usable DC electricity using high efficiency N-type monocrystalline cells. These cells are arranged in a 132 half cell configuration to reduce internal resistance and improve energy harvest in real conditions. Front glass with anti reflection coating lets in more light, while the bifacial rear glass captures reflected and diffuse light from the environment. The module operates within a wide temperature range from minus 40 to plus 85 degrees Celsius, preserving performance in diverse climates. When sunlight hits the panel, electrical current is produced and exits through the integrated junction box and 4 mm² solar cables. The generated DC power is then routed to compatible inverters, which convert it to AC electricity for site loads or export to the grid. Across its lifetime, low temperature coefficients and controlled degradation help keep energy yield close to the rated output. This process runs silently and continuously whenever sufficient irradiance is available on site.

N-type half cell conversion: The panel uses TNC N-type monocrystalline cells arranged as 132 half cells. This layout reduces resistive losses and enhances efficiency under real world operating conditions.

Bifacial dual glass generation: Light enters through 2.0 millimetre AR coated semi tempered front glass and is also harvested through the rear glass. On bright and reflective surfaces, rear side gain can significantly boost total energy output.

System integration and power flow: Current flows through an IP68 junction box with three diodes and along 4 mm² cables to the inverter. The inverter then converts DC into grid compatible AC, enabling use in commercial loads or export to utility networks.

Technical Specifications

Module Type TWMNF-66HD705W N-type half cell bifacial module
Cell Technology and Type N-type monocrystalline TNC half cells
Cell Count and Orientation 132 cells, 6×22 half cell layout
Module Technology Bifacial dual glass, monocrystalline
Power Range 705 Wp to 725 Wp series range
Maximum Power (Pmax) 705 Wp at standard test conditions
Module Efficiency 22.7% for the 705 Wp configuration
Voltage at Maximum Power (Vmpp) 40.52 V
Current at Maximum Power (Impp) 17.4 A
Open Circuit Voltage (Voc) 48.77 V
Short Circuit Current (Isc) 18.4 A
Power Output Tolerance 0 to +3%
Bifaciality Factor 80% ± 5% rear side relative to front
Operating Temperature Range -40°C to +85°C
Temperature Coefficient of Pmax -0.28% per °C
Temperature Coefficient of Voc -0.24% per °C
Temperature Coefficient of Isc +0.046% per °C
Maximum System Voltage 1500 V DC
Maximum Series Fuse Rating 35 A
Panel Dimensions (H×W×D) 2384 × 1303 × 33 mm
Module Weight 37.9 kg
Front Glass 2.0 mm AR coated semi tempered glass
Rear Glass 2.0 mm semi tempered glass
Frame Material Anodized aluminium alloy frame
Junction Box Rating and Diodes IP68 junction box with three bypass diodes
Cable Cross Section and Length 4 mm² cables, standard 1400 mm length
Static Load Capacity 5,400 Pa front and 2,400 Pa rear test load
Packaging Information 33 pieces per pallet, 594 pieces per 40'HC container

Certifications & Compliance

Certifications: ISO9001:2015 quality management, ISO14001:2015 environmental management, ISO45001:2018 health and safety, ISO50001:2018 energy management, EC62941:2019 PV module quality system, IEC 61215, IEC 61730, IEC TS 62804, IEC 61701, IEC 62716, IEC 60068-2-68 type approvals.
Inverter Compatibility: Designed for modern 1500 V DC string and central inverters used on C&I and utility scale systems. Always confirm final string sizing, current limits and voltage windows with the chosen inverter datasheet and local codes.
Environmental: Dual glass and anodized aluminium construction supports corrosion resistance in coastal and industrial sites. Certified for reliability under damp heat, thermal cycling, mechanical load and ammonia or salt mist exposure according to relevant IEC standards.
Warranty: 12 year material and workmanship warranty plus 30 year linear power output warranty. First year degradation is limited to about 1%, followed by a maximum of 0.4% per year, with guaranteed 87.4% of initial output 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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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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When you choose Portlandia Electric Supply, you’re buying real products from a trusted company with established supplier relationships. Enjoy peace of mind with 100% manufacturer warranty coverage and lifetime customer support. In an age where online shopping is fraught with risks, it’s crucial to avoid fly-by-night websites that skirt regulations. Shop with confidence, knowing you’re getting genuine quality and reliable service.

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