Green Sun Solar GSPV-300W (156M)66
Green Sun Solar GSPV-300W (156M)66
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Green Sun Solar GSPV-300W (156M)66

Green Sun Solar GSPV-300W (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 300W
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-300W 156M 66-Cell Monocrystalline Solar Panel

Model GSPV-300W | Monocrystalline Silicon | 66 Full Cells (156 x 156 mm) | Monofacial | 1000V DC System Voltage

300W
Max Power Output
High
Module Efficiency
66
N-Type TOPCon

Product Overview

The Green Sun Solar GSPV-300W 156M 66-Cell Monocrystalline Solar Panel is engineered for reliable on-grid and off-grid power generation in residential, commercial, and small industrial projects. This high quality monocrystalline module delivers a maximum power output of 300 watts under standard test conditions, providing a strong balance between performance, panel size, and system cost. With robust mechanical construction, including a double-layer anodized aluminum alloy frame and 3.2 mm tempered glass, the panel is designed to withstand challenging outdoor environments over many years of service. A 66 cell layout using 156 x 156 mm monocrystalline solar cells delivers stable power with tightly controlled tolerances from 0 to +5 watts for predictable system design. Long term performance is further supported by a linear power output warranty, ensuring at least 95% of rated power in the first year and 80% of rated power by year twenty five. This makes the panel a dependable choice for installers and system designers seeking durable hardware from a professional solar manufacturer.

Key Benefits

Stable 300W power class: The panel provides a rated output of 300W, supported by a positive power tolerance of 0 to +5W for consistent field performance and simplified array design across different installation types.

Proven monocrystalline technology: High quality monocrystalline cells offer strong efficiency, reliable energy yield, and good low light behavior, helping systems deliver more kilowatt hours over the lifetime of the installation.

Durable construction for harsh climates: A 3.2 mm tempered glass front, TPT backsheet, and robust aluminum frame allow the module to handle wind loads up to 2400 Pa and snow loads up to 5400 Pa in demanding sites.

Extended linear power warranty: The linear performance warranty is designed so power remains at least 95% of the rated value in year one and is guaranteed to stay at 80% of rated output at year twenty five.

Easy system integration: MC4 compatible connectors, 4 mm² cables, and a 1000V DC system voltage rating make the module simple to integrate into most mainstream inverters and mounting systems used by installers.

Versatile applications: The module suits rooftop arrays, ground mounted systems, and project based installations, supporting both small home systems and larger commercial fields with reliable performance.

How It Works

The Green Sun Solar GSPV-300W monocrystalline solar panel converts sunlight into usable DC electricity through a series of interconnected high efficiency cells. Each of the 66 monocrystalline cells generates a small voltage when exposed to light, and these cells are wired together to build the panel’s overall output. Under standard test conditions of 1000 W per square meter, 25°C module temperature, and AM 1.5 spectrum, the module reaches a nominal voltage of around 34.18 V and a nominal current of about 8.78 A. This power is delivered through factory installed MC4 compatible connectors and 4 mm² cables, allowing quick connection to inverters, charge controllers, or complete system wiring harnesses. The panel is engineered to operate safely between -40°C and 85°C, and the electrical behavior over temperature is defined by published coefficients, supporting accurate array sizing and performance modeling. With its robust frame and weather resistant junction box, the module continues producing energy year after year, feeding clean electricity into on-grid or off-grid systems.

Light absorption and DC generation: Sunlight strikes the 156 x 156 mm monocrystalline cells, where photons are absorbed and electron flow is created within the silicon material. The resulting direct current is combined across the 66 cells to deliver the module’s rated power, with open circuit voltage reaching about 40.29 V and short circuit current around 9.58 A under standard test conditions.

Protection, encapsulation, and reliability: The solar cells are encapsulated in EVA and protected by a front layer of 3.2 mm tempered glass for impact resistance and long term optical clarity. A TPT backsheet and double layer anodized aluminum frame work together with an IP65 or IP67 compatible junction box to keep moisture and dust away from sensitive components, supporting long service life in outdoor environments.

System integration and power delivery: Factory fitted MC4 connectors and 900 mm cables allow quick plug and play connection in series or parallel strings to reach the desired array voltage and current. With a maximum system voltage rating of 1000 V DC and defined temperature coefficients for current, voltage, and maximum power, designers can size arrays correctly, connect to compatible inverters, and deliver stable energy to homes, businesses, or project sites.

Technical Specifications

Model Series GSPV-285W / 290W / 295W / 300W / 305W / 310W / 315W (156M)66
Rated Maximum Power (Pmax) 300 W for GSPV-300W (range 285 W to 315 W across series)
Power Tolerance 0 to +5 W positive tolerance
Cell Type Monocrystalline silicon solar cell
Cell Size 156 mm x 156 mm
Number of Cells 66 cells (6 x 11 layout)
Nominal Voltage (Vmp) – 300W 34.18 V under STC
Nominal Current (Imp) – 300W 8.78 A under STC
Open Circuit Voltage (Voc) – 300W 40.29 V under STC
Short Circuit Current (Isc) – 300W 9.58 A under STC
Fill Factor (FF) – 300W 77.72 %
Cell Output per Cell – 300W Approximately 4.63 W per cell
Nominal Operating Cell Temperature (NOCT) 45°C ± 2°C
Temperature Coefficient of Isc +0.049 % / °C
Temperature Coefficient of Voc -0.340 % / °C
Temperature Coefficient of Pmax -0.430 % / °C
Front Cover 3.2 mm tempered glass
Back Cover TPT (Tedlar – PET – Tedlar) backsheet
Encapsulation 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 compatible connectors, 4 mm² cable, 900 mm length
Maximum System Voltage 1000 V DC
Application Class Class A
Operating Temperature Range -40°C to +85°C
Storage Temperature Range -40°C to +85°C
Maximum Wind Load 2400 Pa
Maximum Snow Load 5400 Pa
Module Dimensions (L x W x H) 1790 mm x 990 mm x 40 mm
Module Weight 20.0 kg
Standard Test Conditions (STC) Irradiance 1000 W/m², module temperature 25°C, AM 1.5
Packing Configuration 26 pieces per pallet, 624 pieces per 40HQ container

Certifications & Compliance

Certifications: Standard international safety and performance certifications for crystalline silicon PV modules are supported by the manufacturer; detailed certificate lists are available on request from Shandong Green Sun Trade Co., Ltd.
Inverter Compatibility: Compatible with most mainstream string and central inverters designed for 1000 V DC systems when configured within operating voltage and current limits.
Environmental: Designed for outdoor use with IP65/IP67 compatible junction box, corrosion resistant aluminum frame, and materials suitable for a wide range of climates.
Warranty: 10 years on materials and workmanship, plus a linear power output warranty with 95% of rated power in the first year and at least 80% of rated power by year 25. The series is also specified with an additional statement of 10 years at 90% output and 20 years at 80% output, reflecting the long term performance commitment.

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-300W 156M 66-Cell Monocrystalline Solar Panel

Model GSPV-300W | Monocrystalline Silicon | 66 Full Cells (156 x 156 mm) | Monofacial | 1000V DC System Voltage

300W
Max Power Output
High
Module Efficiency
66
N-Type TOPCon

Product Overview

The Green Sun Solar GSPV-300W 156M 66-Cell Monocrystalline Solar Panel is engineered for reliable on-grid and off-grid power generation in residential, commercial, and small industrial projects. This high quality monocrystalline module delivers a maximum power output of 300 watts under standard test conditions, providing a strong balance between performance, panel size, and system cost. With robust mechanical construction, including a double-layer anodized aluminum alloy frame and 3.2 mm tempered glass, the panel is designed to withstand challenging outdoor environments over many years of service. A 66 cell layout using 156 x 156 mm monocrystalline solar cells delivers stable power with tightly controlled tolerances from 0 to +5 watts for predictable system design. Long term performance is further supported by a linear power output warranty, ensuring at least 95% of rated power in the first year and 80% of rated power by year twenty five. This makes the panel a dependable choice for installers and system designers seeking durable hardware from a professional solar manufacturer.

Key Benefits

Stable 300W power class: The panel provides a rated output of 300W, supported by a positive power tolerance of 0 to +5W for consistent field performance and simplified array design across different installation types.

Proven monocrystalline technology: High quality monocrystalline cells offer strong efficiency, reliable energy yield, and good low light behavior, helping systems deliver more kilowatt hours over the lifetime of the installation.

Durable construction for harsh climates: A 3.2 mm tempered glass front, TPT backsheet, and robust aluminum frame allow the module to handle wind loads up to 2400 Pa and snow loads up to 5400 Pa in demanding sites.

Extended linear power warranty: The linear performance warranty is designed so power remains at least 95% of the rated value in year one and is guaranteed to stay at 80% of rated output at year twenty five.

Easy system integration: MC4 compatible connectors, 4 mm² cables, and a 1000V DC system voltage rating make the module simple to integrate into most mainstream inverters and mounting systems used by installers.

Versatile applications: The module suits rooftop arrays, ground mounted systems, and project based installations, supporting both small home systems and larger commercial fields with reliable performance.

How It Works

The Green Sun Solar GSPV-300W monocrystalline solar panel converts sunlight into usable DC electricity through a series of interconnected high efficiency cells. Each of the 66 monocrystalline cells generates a small voltage when exposed to light, and these cells are wired together to build the panel’s overall output. Under standard test conditions of 1000 W per square meter, 25°C module temperature, and AM 1.5 spectrum, the module reaches a nominal voltage of around 34.18 V and a nominal current of about 8.78 A. This power is delivered through factory installed MC4 compatible connectors and 4 mm² cables, allowing quick connection to inverters, charge controllers, or complete system wiring harnesses. The panel is engineered to operate safely between -40°C and 85°C, and the electrical behavior over temperature is defined by published coefficients, supporting accurate array sizing and performance modeling. With its robust frame and weather resistant junction box, the module continues producing energy year after year, feeding clean electricity into on-grid or off-grid systems.

Light absorption and DC generation: Sunlight strikes the 156 x 156 mm monocrystalline cells, where photons are absorbed and electron flow is created within the silicon material. The resulting direct current is combined across the 66 cells to deliver the module’s rated power, with open circuit voltage reaching about 40.29 V and short circuit current around 9.58 A under standard test conditions.

Protection, encapsulation, and reliability: The solar cells are encapsulated in EVA and protected by a front layer of 3.2 mm tempered glass for impact resistance and long term optical clarity. A TPT backsheet and double layer anodized aluminum frame work together with an IP65 or IP67 compatible junction box to keep moisture and dust away from sensitive components, supporting long service life in outdoor environments.

System integration and power delivery: Factory fitted MC4 connectors and 900 mm cables allow quick plug and play connection in series or parallel strings to reach the desired array voltage and current. With a maximum system voltage rating of 1000 V DC and defined temperature coefficients for current, voltage, and maximum power, designers can size arrays correctly, connect to compatible inverters, and deliver stable energy to homes, businesses, or project sites.

Technical Specifications

Model Series GSPV-285W / 290W / 295W / 300W / 305W / 310W / 315W (156M)66
Rated Maximum Power (Pmax) 300 W for GSPV-300W (range 285 W to 315 W across series)
Power Tolerance 0 to +5 W positive tolerance
Cell Type Monocrystalline silicon solar cell
Cell Size 156 mm x 156 mm
Number of Cells 66 cells (6 x 11 layout)
Nominal Voltage (Vmp) – 300W 34.18 V under STC
Nominal Current (Imp) – 300W 8.78 A under STC
Open Circuit Voltage (Voc) – 300W 40.29 V under STC
Short Circuit Current (Isc) – 300W 9.58 A under STC
Fill Factor (FF) – 300W 77.72 %
Cell Output per Cell – 300W Approximately 4.63 W per cell
Nominal Operating Cell Temperature (NOCT) 45°C ± 2°C
Temperature Coefficient of Isc +0.049 % / °C
Temperature Coefficient of Voc -0.340 % / °C
Temperature Coefficient of Pmax -0.430 % / °C
Front Cover 3.2 mm tempered glass
Back Cover TPT (Tedlar – PET – Tedlar) backsheet
Encapsulation 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 compatible connectors, 4 mm² cable, 900 mm length
Maximum System Voltage 1000 V DC
Application Class Class A
Operating Temperature Range -40°C to +85°C
Storage Temperature Range -40°C to +85°C
Maximum Wind Load 2400 Pa
Maximum Snow Load 5400 Pa
Module Dimensions (L x W x H) 1790 mm x 990 mm x 40 mm
Module Weight 20.0 kg
Standard Test Conditions (STC) Irradiance 1000 W/m², module temperature 25°C, AM 1.5
Packing Configuration 26 pieces per pallet, 624 pieces per 40HQ container

Certifications & Compliance

Certifications: Standard international safety and performance certifications for crystalline silicon PV modules are supported by the manufacturer; detailed certificate lists are available on request from Shandong Green Sun Trade Co., Ltd.
Inverter Compatibility: Compatible with most mainstream string and central inverters designed for 1000 V DC systems when configured within operating voltage and current limits.
Environmental: Designed for outdoor use with IP65/IP67 compatible junction box, corrosion resistant aluminum frame, and materials suitable for a wide range of climates.
Warranty: 10 years on materials and workmanship, plus a linear power output warranty with 95% of rated power in the first year and at least 80% of rated power by year 25. The series is also specified with an additional statement of 10 years at 90% output and 20 years at 80% output, reflecting the long term performance commitment.

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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