Sunceco SEM 320 Diamond
Sunceco SEM 320 Diamond
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Sunceco SEM 320 Diamond

Sunceco SEM 320 Diamond

OEM Authorized Dealer BABA Compliant Full OEM Warranty 7-10 Business Day Delivery

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In Stock

Get yours today!

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9+ sold

In the last 7 days

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Flat Rate Shipping - Calculated at Checkout

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Lifetime Customer Support

Unlimited lifetime support, always available.

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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.

Sunceco SEM 320 Diamond 320W Monocrystalline Mono Solar Panel

Model SEM 320 Diamond | Mono-crystalline Silicon | 60 Full-Cell | Monofacial | 1000V System Voltage

320 W
Max Power Output
18.48 %
Module Efficiency
60 Cells
Monocrystalline

Product Overview

The Sunceco SEM 320 Diamond monocrystalline solar panel delivers reliable 320 watt performance for residential and commercial arrays. This Diamond Series module offers high efficiency, durable construction and long-term power stability for grid-tied or off-grid systems. With module efficiency of 18.48 percent, more power is generated from limited roof space or mounting area. A wide operating temperature range and robust mechanical design support dependable operation in demanding climates. Positive power tolerance ensures that real-world output meets or exceeds the nameplate rating. This panel belongs to a performance range from 315 to 345 watts, making it easy to match with other Sunceco modules. It is an excellent choice for customers seeking a bankable, UL and IEC compliant mono-crystalline module with proven durability. The Sunceco SEM 320 Diamond solar panel has been engineered to provide attractive energy yields over decades of service life.

Key Benefits

High efficiency output: Module efficiency up to 18.48 percent allows more energy generation from the same footprint. This higher efficiency supports better performance on compact roofs and space constrained sites.

Reliable monocrystalline design: Mono-crystalline silicon cells deliver stable performance and attractive aesthetics. The black cell appearance suits modern homes and commercial projects wanting a clean look.

Strong power warranties: Sunceco backs the module with 15 years product warranty and long-term power guarantees. Output remains at 90 percent after 12 years and 80 percent after 25 years, giving strong confidence in lifetime yield.

Durable mechanical construction: A reinforced 3.2 millimeter tempered front glass and anodized aluminum frame provide structural strength. The IP67 junction box and MC4 compatible connectors help ensure secure, weather resistant connections in harsh conditions.

Flexible system integration: With a 1000 volt maximum system voltage and standard MC4 cabling, this module integrates with most leading inverters and mounting systems. The power range from 315 to 345 watts simplifies string design across various project sizes.

Bankable and thoroughly tested: Triple 100 percent EL testing, PID free design and resistance to sand, dust, salt mist and ammonia enhance reliability. This level of quality control supports bankable project financing and long-term asset performance.

How It Works

The Sunceco SEM 320 Diamond converts sunlight into usable DC electricity through high quality mono-crystalline silicon cells. When sunlight hits the advanced textured cell surface, photons transfer energy to electrons within the silicon structure. This energy creates an electric field that drives electrons through the cell, generating a direct current. Cells are wired together inside the laminated module to deliver a combined maximum power of 320 watts at standard test conditions. The tempered glass, encapsulant and backsheet protect the cells while allowing high light transmission. Current flows from the junction box through MC4 compatible connectors and 4.0 square millimeter DC cables toward the inverter. Once the DC power reaches a compatible inverter, it is converted to AC electricity for building use or export to the grid. Temperature coefficients are optimized so that output remains predictable as the module temperature rises in real operating environments.

Monocrystalline energy conversion: Each mono-crystalline silicon cell features an ordered crystal structure that supports efficient electron movement. This structure improves the conversion of solar irradiance into electrical current under a wide range of conditions.

Module operation at STC and NMOT: At standard test conditions, the module delivers 320 watts with a Vmpp of 36.29 volts and Impp of 8.82 amps. At nominal module operating temperature, typical output is 238 watts, with performance adjusted by precise temperature coefficients.

System integration and protection: The IP67 junction box, diodes and MC4 connectors help protect internal electrical paths from moisture and dust. Strings of modules can be combined up to 1000 volts system voltage, then linked to inverters, optimizers or charge controllers as required.

Technical Specifications

Brand Sunceco Inc., United States
Model SEM 320 Diamond, Diamond Series Mono-crystalline Solar Module
Cell Technology and Type Mono-crystalline silicon, monofacial design
Power Range (Series) 315 Wp to 345 Wp Diamond Series
Maximum Power Pmax (STC) 320 Wp at 1000 W/m², 25 °C, AM 1.5
Module Efficiency 18.48 % for SEM 320, up to 19.92 % in series
Operating Voltage Vmpp (STC) 36.29 V
Operating Current Impp (STC) 8.82 A
Open Circuit Voltage Voc (STC) 43.30 V
Short Circuit Current Isc (STC) 9.27 A
Maximum Power Pmax (NMOT) 238 Wp at nominal module operating temperature
Operating Voltage Vmpp (NMOT) 32.86 V
Operating Current Impp (NMOT) 7.25 A
Open Circuit Voltage Voc (NMOT) 40.11 V
Short Circuit Current Isc (NMOT) 7.68 A
Power Tolerance 0 to +5 W positive tolerance in datasheet, 0 to +1.5 % in listing
Total Degradation Rate 0.8 % stated overall degradation reference
Nominal Operating Cell Temperature 42 ± 3 °C
Operating Temperature Range -40 °C to 85 °C
Temperature Coefficient of Pmax -0.308 % / °C
Temperature Coefficient of Voc -0.243 % / °C
Temperature Coefficient of Isc +0.047 % / °C
Maximum System Voltage 1000 V DC
Module Dimensions (H × W × D) 1762 × 983 × 35 mm
Weight 19.5 kg
Front Glass 3.2 mm high transmittance tempered reinforced glass
Backsheet Anti-aging backsheet film
Frame Anodized aluminum alloy frame, robust design
Junction Box Protection Rating IP67, factory fitted with bypass diodes
Connector Type MC4 compatible connectors
Cable Specification 4.0 mm² PV special cable

Certifications & Compliance

Certifications: CE compliant, IEC 61215-1, IEC 61215-1-1, IEC 61215-2, IEC 61730-1, IEC 61730-2, Application Class A, Safety Class II, UL 1703.
Inverter Compatibility: Suitable for most modern string and central inverters rated for 1000 V DC systems. Standard MC4 connectors and typical operating voltages simplify integration with leading brands.
Environmental: Designed as PID free with advanced surface texturing and resistance to sand and dust abrasion. Tested for safety in salt mist and ammonia rich environments, and qualified for wind loads up to 3800 Pa and snow loads up to 5400 Pa including hail impact resistance.
Warranty: 15 year manufacturing product warranty, 12 year power warranty at 90 percent of nominal output and 25 year power warranty at 80 percent of nominal output, supporting dependable long term energy production.

Documentation

Product Datasheet (PDF)

● Available | Contact us for lead time and pricing

Customer Reviews

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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.

Sunceco SEM 320 Diamond 320W Monocrystalline Mono Solar Panel

Model SEM 320 Diamond | Mono-crystalline Silicon | 60 Full-Cell | Monofacial | 1000V System Voltage

320 W
Max Power Output
18.48 %
Module Efficiency
60 Cells
Monocrystalline

Product Overview

The Sunceco SEM 320 Diamond monocrystalline solar panel delivers reliable 320 watt performance for residential and commercial arrays. This Diamond Series module offers high efficiency, durable construction and long-term power stability for grid-tied or off-grid systems. With module efficiency of 18.48 percent, more power is generated from limited roof space or mounting area. A wide operating temperature range and robust mechanical design support dependable operation in demanding climates. Positive power tolerance ensures that real-world output meets or exceeds the nameplate rating. This panel belongs to a performance range from 315 to 345 watts, making it easy to match with other Sunceco modules. It is an excellent choice for customers seeking a bankable, UL and IEC compliant mono-crystalline module with proven durability. The Sunceco SEM 320 Diamond solar panel has been engineered to provide attractive energy yields over decades of service life.

Key Benefits

High efficiency output: Module efficiency up to 18.48 percent allows more energy generation from the same footprint. This higher efficiency supports better performance on compact roofs and space constrained sites.

Reliable monocrystalline design: Mono-crystalline silicon cells deliver stable performance and attractive aesthetics. The black cell appearance suits modern homes and commercial projects wanting a clean look.

Strong power warranties: Sunceco backs the module with 15 years product warranty and long-term power guarantees. Output remains at 90 percent after 12 years and 80 percent after 25 years, giving strong confidence in lifetime yield.

Durable mechanical construction: A reinforced 3.2 millimeter tempered front glass and anodized aluminum frame provide structural strength. The IP67 junction box and MC4 compatible connectors help ensure secure, weather resistant connections in harsh conditions.

Flexible system integration: With a 1000 volt maximum system voltage and standard MC4 cabling, this module integrates with most leading inverters and mounting systems. The power range from 315 to 345 watts simplifies string design across various project sizes.

Bankable and thoroughly tested: Triple 100 percent EL testing, PID free design and resistance to sand, dust, salt mist and ammonia enhance reliability. This level of quality control supports bankable project financing and long-term asset performance.

How It Works

The Sunceco SEM 320 Diamond converts sunlight into usable DC electricity through high quality mono-crystalline silicon cells. When sunlight hits the advanced textured cell surface, photons transfer energy to electrons within the silicon structure. This energy creates an electric field that drives electrons through the cell, generating a direct current. Cells are wired together inside the laminated module to deliver a combined maximum power of 320 watts at standard test conditions. The tempered glass, encapsulant and backsheet protect the cells while allowing high light transmission. Current flows from the junction box through MC4 compatible connectors and 4.0 square millimeter DC cables toward the inverter. Once the DC power reaches a compatible inverter, it is converted to AC electricity for building use or export to the grid. Temperature coefficients are optimized so that output remains predictable as the module temperature rises in real operating environments.

Monocrystalline energy conversion: Each mono-crystalline silicon cell features an ordered crystal structure that supports efficient electron movement. This structure improves the conversion of solar irradiance into electrical current under a wide range of conditions.

Module operation at STC and NMOT: At standard test conditions, the module delivers 320 watts with a Vmpp of 36.29 volts and Impp of 8.82 amps. At nominal module operating temperature, typical output is 238 watts, with performance adjusted by precise temperature coefficients.

System integration and protection: The IP67 junction box, diodes and MC4 connectors help protect internal electrical paths from moisture and dust. Strings of modules can be combined up to 1000 volts system voltage, then linked to inverters, optimizers or charge controllers as required.

Technical Specifications

Brand Sunceco Inc., United States
Model SEM 320 Diamond, Diamond Series Mono-crystalline Solar Module
Cell Technology and Type Mono-crystalline silicon, monofacial design
Power Range (Series) 315 Wp to 345 Wp Diamond Series
Maximum Power Pmax (STC) 320 Wp at 1000 W/m², 25 °C, AM 1.5
Module Efficiency 18.48 % for SEM 320, up to 19.92 % in series
Operating Voltage Vmpp (STC) 36.29 V
Operating Current Impp (STC) 8.82 A
Open Circuit Voltage Voc (STC) 43.30 V
Short Circuit Current Isc (STC) 9.27 A
Maximum Power Pmax (NMOT) 238 Wp at nominal module operating temperature
Operating Voltage Vmpp (NMOT) 32.86 V
Operating Current Impp (NMOT) 7.25 A
Open Circuit Voltage Voc (NMOT) 40.11 V
Short Circuit Current Isc (NMOT) 7.68 A
Power Tolerance 0 to +5 W positive tolerance in datasheet, 0 to +1.5 % in listing
Total Degradation Rate 0.8 % stated overall degradation reference
Nominal Operating Cell Temperature 42 ± 3 °C
Operating Temperature Range -40 °C to 85 °C
Temperature Coefficient of Pmax -0.308 % / °C
Temperature Coefficient of Voc -0.243 % / °C
Temperature Coefficient of Isc +0.047 % / °C
Maximum System Voltage 1000 V DC
Module Dimensions (H × W × D) 1762 × 983 × 35 mm
Weight 19.5 kg
Front Glass 3.2 mm high transmittance tempered reinforced glass
Backsheet Anti-aging backsheet film
Frame Anodized aluminum alloy frame, robust design
Junction Box Protection Rating IP67, factory fitted with bypass diodes
Connector Type MC4 compatible connectors
Cable Specification 4.0 mm² PV special cable

Certifications & Compliance

Certifications: CE compliant, IEC 61215-1, IEC 61215-1-1, IEC 61215-2, IEC 61730-1, IEC 61730-2, Application Class A, Safety Class II, UL 1703.
Inverter Compatibility: Suitable for most modern string and central inverters rated for 1000 V DC systems. Standard MC4 connectors and typical operating voltages simplify integration with leading brands.
Environmental: Designed as PID free with advanced surface texturing and resistance to sand and dust abrasion. Tested for safety in salt mist and ammonia rich environments, and qualified for wind loads up to 3800 Pa and snow loads up to 5400 Pa including hail impact resistance.
Warranty: 15 year manufacturing product warranty, 12 year power warranty at 90 percent of nominal output and 25 year power warranty at 80 percent of nominal output, supporting dependable long term energy production.

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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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

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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