Green Sun Solar GSPV-290W (156M)66
Green Sun Solar GSPV-290W (156M)66
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Green Sun Solar GSPV-290W (156M)66

Green Sun Solar GSPV-290W (156M)66

OEM Authorized Dealer BABA Compliant Full OEM Warranty 7-10 Business Day Delivery
$180.00 USD
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Specifications

Power Rating 290W
Length 156 m

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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.

Green Sun Solar GSPV-290W 290W Monocrystalline 66-Cell Solar Panel

Model GSPV-290W (156M)66 | Monocrystalline Silicon | 66 Full-Cell 156 x 156 mm | Monofacial | 1000V DC System Voltage

290W
Max Power Output
High
Module Efficiency
66 Cells
Monocrystalline Design

Product Overview

The Green Sun Solar GSPV-290W 290W Monocrystalline 66-Cell Solar Panel is engineered for reliable on‑grid and off‑grid applications in residential, commercial, and small industrial systems. This robust panel combines a 290 watt output with proven monocrystalline cell technology for stable energy production across a wide range of climates. A durable 3.2 mm tempered glass front and double‑layer anodized aluminum alloy frame protect the cells from harsh weather and mechanical stress. The module is designed to perform in temperatures from -40℃ to 85℃, making it suitable for both hot and cold environments. With a maximum system voltage of 1000V DC and a strong wind and snow load rating, it integrates well into modern rooftop and ground‑mounted arrays. The panel offers a positive power tolerance of 0 to 5W, which supports predictable performance and helps system designers size arrays with greater confidence. Backed by long‑term power output warranties, this panel is a dependable choice for users seeking consistent performance and value over many years of operation.

Key Benefits

Optimized 290W power output: The panel delivers a rated 290W at standard test conditions, supporting efficient array layouts in both small and large systems without excessive roof space demands.

Reliable monocrystalline cell design: High quality 156 x 156 mm monocrystalline cells help provide stable performance, strong energy yields, and good low‑irradiance response throughout the day.

Durable construction for harsh climates: A tempered glass front, TPT backsheet, and anodized aluminum frame combine with 2400Pa wind and 5400Pa snow ratings for robust outdoor operation in challenging weather.

Long‑term performance assurance: Linear power output warranties help protect long‑term energy production, giving system owners confidence in expected output over the service life of the array.

Versatile system integration: The module’s 1000V DC system voltage, MC4 connectors, and 4 mm² cables support straightforward integration with a wide range of inverters and mounting solutions.

How It Works

This Green Sun Solar monocrystalline panel converts sunlight into usable electrical power through a series of high efficiency silicon cells wired in a 66‑cell matrix. When sunlight hits the cell surface, photons excite electrons within the silicon wafer and create a direct current flow. The tempered glass front allows high light transmission while shielding the cells from impact and environmental exposure. The EVA encapsulant secures each cell and maintains consistent optical contact over time. A weatherproof TPT backsheet and sealed junction box protect the electrical connections from moisture ingress. The generated DC power is routed through factory‑installed 4 mm² cables with MC4 connectors and then supplied to a compatible inverter or charge controller. In a grid‑tie system, the inverter converts this DC power into AC power synchronized with utility standards. In an off‑grid or hybrid system, the power is managed by controllers and storage devices to meet local load needs. The panel continues to operate across a broad temperature range, supported by defined temperature coefficients that describe how output changes as the cells heat or cool under real‑world conditions.

Monocrystalline energy conversion: Each 156 x 156 mm monocrystalline cell uses a uniform crystal structure to support efficient charge separation and current flow. The cells are wired in series within the 66‑cell layout to provide a nominal operating voltage suited to modern inverter inputs.

Module protection and durability: The 3.2 mm tempered glass front, EVA encapsulant, and TPT backsheet work together to shield the cells from moisture, dust, and mechanical loads. The double‑layer anodized aluminum alloy frame supports secure attachment to racks while maintaining panel rigidity over many years.

System integration and output stability: The junction box, rated to IP65 or IP67, safeguards internal connections and diodes while the MC4 connectors allow fast, secure wiring runs. Defined NOCT and temperature coefficients help system designers model real‑world performance, supporting stable energy production across seasons.

Technical Specifications

Manufacturer Shandong Green Sun Trade Co., Ltd.
Model GSPV-290W (156M)66
Nominal Power (Pmax) 290W at STC
Power Range for Series 285W to 315W across GSPV-285W to GSPV-315W models
Power Tolerance 0 to +5W
Cell Type Monocrystalline silicon solar cell
Cell Size 156 x 156 mm
Number of Cells 66 cells (6 x 11 layout)
Nominal Voltage (Vmp) 34.28 V for GSPV-290W
Nominal Current (Imp) 8.46 A for GSPV-290W
Open Circuit Voltage (Voc) 40.21 V for GSPV-290W
Short Circuit Current (Isc) 9.31 A for GSPV-290W
Fill Factor (FF) 77.46 % for GSPV-290W
Cell Power Rating (approx.) Greater than 4.48 W per cell for 290W class
Maximum System Voltage 1000V DC
Operating Temperature Range -40℃ to 85℃
Storage Temperature Range -40℃ to 85℃
Nominal Operating Cell Temperature (NOCT) 45℃ ± 2℃
Temperature Coefficient of Isc +0.049 % / ℃
Temperature Coefficient of Voc -0.340 % / ℃
Temperature Coefficient of Pmpp -0.430 % / ℃
Front Cover 3.2 mm tempered glass
Back Cover TPT (Tedlar – PET – Tedlar) backsheet
Encapsulant Material EVA (ethylene vinyl acetate)
Frame Double‑layer anodized aluminum alloy frame
Junction Box Rating IP65 / IP67 compatible junction box
Cable and Connector Type MC4 connectors with 4 mm² x 900 mm cable
Maximum Wind Load 2400 Pa
Maximum Snow Load 5400 Pa
Application Class Class A
Module Dimensions 1790 x 990 x 40 mm
Module Weight 20.0 kg
Standard Test Conditions (STC) Irradiance 1000 W/m², module temperature 25℃, AM 1.5
Packing Configuration 26 modules per pallet, 624 modules per 40HQ container

Certifications & Compliance

Certifications: Designed to meet typical Class A photovoltaic safety and performance standards used in global grid‑connected and off‑grid systems.
Inverter Compatibility: Suitable for most 1000V DC string inverters and MPPT charge controllers when configured within the specified electrical limits.
Environmental: Engineered for outdoor use with IP65 / IP67 junction box, high snow and wind load ratings, and wide operating temperature range from -40℃ to 85℃.
Warranty: 10 years on materials and workmanship, plus linear power output warranty with 90% output up to 10 years and at least 80% output up to 25 years under stated conditions.

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.

Green Sun Solar GSPV-290W 290W Monocrystalline 66-Cell Solar Panel

Model GSPV-290W (156M)66 | Monocrystalline Silicon | 66 Full-Cell 156 x 156 mm | Monofacial | 1000V DC System Voltage

290W
Max Power Output
High
Module Efficiency
66 Cells
Monocrystalline Design

Product Overview

The Green Sun Solar GSPV-290W 290W Monocrystalline 66-Cell Solar Panel is engineered for reliable on‑grid and off‑grid applications in residential, commercial, and small industrial systems. This robust panel combines a 290 watt output with proven monocrystalline cell technology for stable energy production across a wide range of climates. A durable 3.2 mm tempered glass front and double‑layer anodized aluminum alloy frame protect the cells from harsh weather and mechanical stress. The module is designed to perform in temperatures from -40℃ to 85℃, making it suitable for both hot and cold environments. With a maximum system voltage of 1000V DC and a strong wind and snow load rating, it integrates well into modern rooftop and ground‑mounted arrays. The panel offers a positive power tolerance of 0 to 5W, which supports predictable performance and helps system designers size arrays with greater confidence. Backed by long‑term power output warranties, this panel is a dependable choice for users seeking consistent performance and value over many years of operation.

Key Benefits

Optimized 290W power output: The panel delivers a rated 290W at standard test conditions, supporting efficient array layouts in both small and large systems without excessive roof space demands.

Reliable monocrystalline cell design: High quality 156 x 156 mm monocrystalline cells help provide stable performance, strong energy yields, and good low‑irradiance response throughout the day.

Durable construction for harsh climates: A tempered glass front, TPT backsheet, and anodized aluminum frame combine with 2400Pa wind and 5400Pa snow ratings for robust outdoor operation in challenging weather.

Long‑term performance assurance: Linear power output warranties help protect long‑term energy production, giving system owners confidence in expected output over the service life of the array.

Versatile system integration: The module’s 1000V DC system voltage, MC4 connectors, and 4 mm² cables support straightforward integration with a wide range of inverters and mounting solutions.

How It Works

This Green Sun Solar monocrystalline panel converts sunlight into usable electrical power through a series of high efficiency silicon cells wired in a 66‑cell matrix. When sunlight hits the cell surface, photons excite electrons within the silicon wafer and create a direct current flow. The tempered glass front allows high light transmission while shielding the cells from impact and environmental exposure. The EVA encapsulant secures each cell and maintains consistent optical contact over time. A weatherproof TPT backsheet and sealed junction box protect the electrical connections from moisture ingress. The generated DC power is routed through factory‑installed 4 mm² cables with MC4 connectors and then supplied to a compatible inverter or charge controller. In a grid‑tie system, the inverter converts this DC power into AC power synchronized with utility standards. In an off‑grid or hybrid system, the power is managed by controllers and storage devices to meet local load needs. The panel continues to operate across a broad temperature range, supported by defined temperature coefficients that describe how output changes as the cells heat or cool under real‑world conditions.

Monocrystalline energy conversion: Each 156 x 156 mm monocrystalline cell uses a uniform crystal structure to support efficient charge separation and current flow. The cells are wired in series within the 66‑cell layout to provide a nominal operating voltage suited to modern inverter inputs.

Module protection and durability: The 3.2 mm tempered glass front, EVA encapsulant, and TPT backsheet work together to shield the cells from moisture, dust, and mechanical loads. The double‑layer anodized aluminum alloy frame supports secure attachment to racks while maintaining panel rigidity over many years.

System integration and output stability: The junction box, rated to IP65 or IP67, safeguards internal connections and diodes while the MC4 connectors allow fast, secure wiring runs. Defined NOCT and temperature coefficients help system designers model real‑world performance, supporting stable energy production across seasons.

Technical Specifications

Manufacturer Shandong Green Sun Trade Co., Ltd.
Model GSPV-290W (156M)66
Nominal Power (Pmax) 290W at STC
Power Range for Series 285W to 315W across GSPV-285W to GSPV-315W models
Power Tolerance 0 to +5W
Cell Type Monocrystalline silicon solar cell
Cell Size 156 x 156 mm
Number of Cells 66 cells (6 x 11 layout)
Nominal Voltage (Vmp) 34.28 V for GSPV-290W
Nominal Current (Imp) 8.46 A for GSPV-290W
Open Circuit Voltage (Voc) 40.21 V for GSPV-290W
Short Circuit Current (Isc) 9.31 A for GSPV-290W
Fill Factor (FF) 77.46 % for GSPV-290W
Cell Power Rating (approx.) Greater than 4.48 W per cell for 290W class
Maximum System Voltage 1000V DC
Operating Temperature Range -40℃ to 85℃
Storage Temperature Range -40℃ to 85℃
Nominal Operating Cell Temperature (NOCT) 45℃ ± 2℃
Temperature Coefficient of Isc +0.049 % / ℃
Temperature Coefficient of Voc -0.340 % / ℃
Temperature Coefficient of Pmpp -0.430 % / ℃
Front Cover 3.2 mm tempered glass
Back Cover TPT (Tedlar – PET – Tedlar) backsheet
Encapsulant Material EVA (ethylene vinyl acetate)
Frame Double‑layer anodized aluminum alloy frame
Junction Box Rating IP65 / IP67 compatible junction box
Cable and Connector Type MC4 connectors with 4 mm² x 900 mm cable
Maximum Wind Load 2400 Pa
Maximum Snow Load 5400 Pa
Application Class Class A
Module Dimensions 1790 x 990 x 40 mm
Module Weight 20.0 kg
Standard Test Conditions (STC) Irradiance 1000 W/m², module temperature 25℃, AM 1.5
Packing Configuration 26 modules per pallet, 624 modules per 40HQ container

Certifications & Compliance

Certifications: Designed to meet typical Class A photovoltaic safety and performance standards used in global grid‑connected and off‑grid systems.
Inverter Compatibility: Suitable for most 1000V DC string inverters and MPPT charge controllers when configured within the specified electrical limits.
Environmental: Engineered for outdoor use with IP65 / IP67 junction box, high snow and wind load ratings, and wide operating temperature range from -40℃ to 85℃.
Warranty: 10 years on materials and workmanship, plus linear power output warranty with 90% output up to 10 years and at least 80% output up to 25 years under stated 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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