QPower QPM-645S
QPower QPM-645S
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QPower QPM-645S

QPower QPM-645S

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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.

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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:

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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.

QPower QPM-645S 645W PERC Monocrystalline Solar Panel

Model QPM-645S | PERC Monocrystalline | 132 Cells 210×105 mm | Monofacial | 1500V System Voltage

645 Wp
Max Power Output
20.76–21.41%
Module Efficiency
132
Monocrystalline PERC Cells

Product Overview

The QPower QPM-645S 645W PERC monocrystalline solar panel is designed for high output and long term reliability in demanding installations. This premium module combines advanced PERC cell technology with 132 large format monocrystalline cells to deliver impressive efficiency and stable performance. The panel operates at a maximum power of 645 Wp with efficiency up to 21.41 percent, making it suitable for commercial rooftops and utility scale projects. A robust anodized aluminium frame and 3.2 mm tempered glass help protect the cells against harsh weather and mechanical loads. The module supports system voltages up to 1500 V, allowing cost efficient string designs and reduced balance of system components. With temperature ratings from minus 40 to 85 degrees Celsius, it can be deployed across diverse climate zones. A 12 year product warranty and long term power warranty with low annual degradation support reliable energy generation over decades. Engineered and supplied by QPower in Uzbekistan, this panel offers a strong blend of output, durability and value for modern solar projects.

Key Benefits

High power density for efficient layouts: The 645 Wp power rating enables more installed capacity on limited roof or ground space. This benefit improves project yields without requiring larger installation areas.

Advanced PERC cell technology: PERC monocrystalline cells capture more sunlight and convert it into electricity more efficiently. This design supports strong performance under a wide range of irradiance conditions.

Long term reliability and warranties: A 12 year product warranty is combined with power warranties of 92 percent at year 12 and 83 percent at year 30. This structure demonstrates confidence in long term output stability.

Robust construction for harsh climates: Tempered glass, an anodized aluminium frame and IP68 junction box protection enable dependable operation in challenging environments. The panel tolerates temperatures from minus 40 to 85 degrees Celsius.

Flexible system design with 1500 V rating: The maximum system voltage of 1500 V allows longer strings and reduced cabling. This flexibility can lower balance of system costs and simplify large scale array design.

How It Works

This module converts sunlight into usable direct current electricity using high efficiency PERC monocrystalline cells. Each of the 132 cells is interconnected to create an optimised current and voltage profile at the module level. Under standard test conditions, the panel delivers a maximum power of 645 Wp, with a voltage at maximum power of 37.7 volts and current of 17.11 amperes. The cells generate voltage when exposed to light, and current flows through the integrated busbars and connectors. A sealed junction box with bypass diodes manages current paths and helps reduce losses caused by cell shading. The module is then wired into a string and connected to an inverter, which converts the direct current into alternating current for on site use or grid export. Temperature coefficients are carefully engineered so that output remains predictable as module temperatures change during operation. Over its lifetime, degradation is controlled to a total rate of 0.57 percent per year, maintaining strong performance across three decades.

PERC monocrystalline energy conversion: PERC technology adds a passivated rear surface to each monocrystalline cell, which reflects unabsorbed light back into the cell. This process increases the chances of photon absorption and improves electrical output from the same incident sunlight.

Optimised electrical characteristics: At maximum power, the QPM-645S operates at 37.7 volts and 17.11 amperes, supporting efficient string design. Open circuit voltage reaches 44.8 volts, and short circuit current is 18.25 amperes, giving installers clear parameters for safe and effective system sizing.

Thermal behaviour and durability: The temperature coefficient of power is minus 0.36 percent per degree Celsius, limiting performance losses at higher operating temperatures. Voc and Isc coefficients are carefully balanced, while tempered glass and IP68 junction protection preserve these characteristics in real world conditions.

Technical Specifications

Module Type Monocrystalline PERC, Monofacial
Model Number QPM-645S
Power Range 645 – 665 Wp
Maximum Power (Pmax) – Main Variant 645 Wp
Maximum Power (Pmax) – Secondary Listing 480 Wp (additional configuration reference)
Module Efficiency 20.76 – 21.41 %
Voltage at Maximum Power (Vmpp) – 645 Wp 37.7 V
Current at Maximum Power (Impp) – 645 Wp 17.11 A
Open Circuit Voltage (Voc) – 645 Wp 44.8 V
Short Circuit Current (Isc) – 645 Wp 18.25 A
Voltage at Maximum Power (Vmpp) – 480 Wp Listing 34.47 V
Current at Maximum Power (Impp) – 480 Wp Listing 13.92 A
Open Circuit Voltage (Voc) – 480 Wp Listing 41.65 V
Short Circuit Current (Isc) – 480 Wp Listing 14.82 A
Total Degradation Rate 0.57 % per year (linear approximation)
Nominal Operating Temperature 45 ± 2 °C
Operating Temperature Range -40 to 85 °C
Temperature Coefficient of Pmax -0.36 % / °C
Temperature Coefficient of Voc -0.26 % / °C
Temperature Coefficient of Isc 0.04 % / °C
Maximum System Voltage 1500 V
Series Fuse Rating 30 A
Panel Dimensions (H × W × D) 2384 × 1303 × 35 mm
Weight 34.4 kg
Cell Size 210 × 105 mm
Cell Count 132 cells
Glass Type and Thickness 3.2 mm tempered glass
Frame Type Anodized aluminium frame, black finish
Junction Box Diodes 3 bypass diodes
Junction Box Protection Class IP68
Brand / Seller QPower, Uzbekistan

Certifications & Compliance

Certifications: Designed to comply with common international standards for crystalline PV modules. Detailed certification lists are provided in the official datasheet or upon request.
Inverter Compatibility: Suitable for use with most modern grid tied and hybrid inverters that support 1500 V systems when correctly configured by a qualified installer.
Environmental: Built for outdoor use with IP68 junction box protection, durable tempered glass and anodized aluminium frame for reliable performance in varied climates.
Warranty: 12 year product warranty with power warranty of 92 % at year 12 and 83 % at year 30, reflecting a controlled degradation rate of around 0.57 % per year under standard operating conditions.

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

Be Smart, Buy From an Authorized Dealer

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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