Grankia GMH450W
Grankia GMH450W
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SKU  PES-SPS-SOL-7069

Grankia GMH450W

Grankia GMH450W

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

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truck
In Stock

Get yours today!

truck
9+ sold

In the last 7 days

truck
Flat Rate Shipping - Calculated at Checkout

Delivery timeframe shown above at checkout

Lifetime Customer Support

Unlimited lifetime support, always available.

In High Demand! Order Now To Secure Your Items

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Specifications

Power Rating 450W

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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.

Grankia GMH450W 450W Monocrystalline Solar Panel

Model GMH450W | Monocrystalline | 120 Half-Cell | Monocrystalline | 1500V System Voltage

450 Wp
Max Power Output
20.8%
Module Efficiency
120
Monocrystalline Cells

Product Overview

The Grankia GMH450W is a high-performance solar panel built with monocrystalline technology for reliable energy production. It delivers strong output in a compact format, making it suitable for modern residential and commercial installations. The module is designed for consistent performance, stable electrical behavior, and long service life. Its 120-cell structure helps support efficient power generation across a wide operating range. The panel also includes a 12-year product warranty for added confidence.

Key Benefits

High Power Output: The module reaches 450 Wp for dependable energy generation.

Strong Efficiency: Panel efficiency is rated at 20.8 percent for space-conscious projects.

Stable Electrical Performance: Low power tolerance supports consistent output within the specified range.

Durable Construction: An anodized aluminium frame and IP68 junction box improve outdoor reliability.

Broad Application Range: The 1500V maximum system voltage supports modern solar system designs.

How It Works

The GMH450W converts sunlight into usable electricity through monocrystalline silicon cells. These cells capture solar radiation and generate direct current during daylight hours. The module is designed to produce stable voltage and current under normal operating conditions. Its temperature coefficients help define performance changes as panel temperature rises. The robust build supports long-term operation in demanding environments. This makes the panel practical for systems that need efficient daily energy harvest.

Light Absorption: Monocrystalline cells absorb sunlight and begin producing electricity immediately. Their structure supports efficient energy conversion in strong and moderate light.

Power Generation: The panel delivers power at 34.67V maximum voltage and 12.98A maximum current. This output supports steady energy flow to the system.

System Integration: The 1500V system rating and 25A fuse rating help the panel integrate into larger installations. The 300 mm cable length and 4 mm² cable section assist installation planning.

Technical Specifications

Brand Grankia Electric (Guangdong) Co., Ltd.
Model Number GMH450W
Technology Monocrystalline
Maximum Power (Pmax) 450 Wp
Power Range 430 ~ 455 Wp
Power Tolerance 0 ~ +1 %
Panel Efficiency 20.8 %
Efficiency Range 19.9 ~ 21.1 %
Voltage at Maximum Power (Vmpp) 34.67 V
Current at Maximum Power (Impp) 12.98 A
Open Circuit Voltage (Voc) 41.25 V
Short Circuit Current (Isc) 13.89 A
Cell Size 182×91 mm
Cell Number 120
Glass Thickness 3.2 mm
Encapsulant Type EVA
Frame Type Anodized Aluminium
Junction Box Diodes 3
Junction Box Protection Class IP 68
Cable Crossection 4 mm²
Cable Length 300 mm
Panel Dimension (H/W/D) 1909x1134x30 mm
Weight 23.9 kg
Maximum System Voltage 1500 V
Series Fuse Rating 25 A
Product Warranty 12 Years
Operating Temperature Range -40 - 85 °C
Temperature 45±2 °C
Temperature Coefficient of Pmax -0.35 %/°C
Temperature Coefficient of Voc -0.276 %/°C
Temperature Coefficient of Isc 0.046 %/°C
Seller Country China

Certifications & Compliance

Certifications: Not specified in the provided product data.
Inverter Compatibility: Compatible with standard solar system designs using 1500V architecture.
Environmental: IP68 junction box protection and -40 to 85 °C operating range.
Warranty: 12-year product warranty.

● Available | Contact us for lead time and pricing

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

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.

Grankia GMH450W 450W Monocrystalline Solar Panel

Model GMH450W | Monocrystalline | 120 Half-Cell | Monocrystalline | 1500V System Voltage

450 Wp
Max Power Output
20.8%
Module Efficiency
120
Monocrystalline Cells

Product Overview

The Grankia GMH450W is a high-performance solar panel built with monocrystalline technology for reliable energy production. It delivers strong output in a compact format, making it suitable for modern residential and commercial installations. The module is designed for consistent performance, stable electrical behavior, and long service life. Its 120-cell structure helps support efficient power generation across a wide operating range. The panel also includes a 12-year product warranty for added confidence.

Key Benefits

High Power Output: The module reaches 450 Wp for dependable energy generation.

Strong Efficiency: Panel efficiency is rated at 20.8 percent for space-conscious projects.

Stable Electrical Performance: Low power tolerance supports consistent output within the specified range.

Durable Construction: An anodized aluminium frame and IP68 junction box improve outdoor reliability.

Broad Application Range: The 1500V maximum system voltage supports modern solar system designs.

How It Works

The GMH450W converts sunlight into usable electricity through monocrystalline silicon cells. These cells capture solar radiation and generate direct current during daylight hours. The module is designed to produce stable voltage and current under normal operating conditions. Its temperature coefficients help define performance changes as panel temperature rises. The robust build supports long-term operation in demanding environments. This makes the panel practical for systems that need efficient daily energy harvest.

Light Absorption: Monocrystalline cells absorb sunlight and begin producing electricity immediately. Their structure supports efficient energy conversion in strong and moderate light.

Power Generation: The panel delivers power at 34.67V maximum voltage and 12.98A maximum current. This output supports steady energy flow to the system.

System Integration: The 1500V system rating and 25A fuse rating help the panel integrate into larger installations. The 300 mm cable length and 4 mm² cable section assist installation planning.

Technical Specifications

Brand Grankia Electric (Guangdong) Co., Ltd.
Model Number GMH450W
Technology Monocrystalline
Maximum Power (Pmax) 450 Wp
Power Range 430 ~ 455 Wp
Power Tolerance 0 ~ +1 %
Panel Efficiency 20.8 %
Efficiency Range 19.9 ~ 21.1 %
Voltage at Maximum Power (Vmpp) 34.67 V
Current at Maximum Power (Impp) 12.98 A
Open Circuit Voltage (Voc) 41.25 V
Short Circuit Current (Isc) 13.89 A
Cell Size 182×91 mm
Cell Number 120
Glass Thickness 3.2 mm
Encapsulant Type EVA
Frame Type Anodized Aluminium
Junction Box Diodes 3
Junction Box Protection Class IP 68
Cable Crossection 4 mm²
Cable Length 300 mm
Panel Dimension (H/W/D) 1909x1134x30 mm
Weight 23.9 kg
Maximum System Voltage 1500 V
Series Fuse Rating 25 A
Product Warranty 12 Years
Operating Temperature Range -40 - 85 °C
Temperature 45±2 °C
Temperature Coefficient of Pmax -0.35 %/°C
Temperature Coefficient of Voc -0.276 %/°C
Temperature Coefficient of Isc 0.046 %/°C
Seller Country China

Certifications & Compliance

Certifications: Not specified in the provided product data.
Inverter Compatibility: Compatible with standard solar system designs using 1500V architecture.
Environmental: IP68 junction box protection and -40 to 85 °C operating range.
Warranty: 12-year product warranty.

● Available | Contact us for lead time and pricing
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Customer Success Stories

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

Troy P

EG4 off-grid base kit, Happy with my purchase.

This is the first stage of my three planned purches. I got the eg4 inverter 6000 XP base kit with six 400 watt panels and the two server rack batteries. Did a little online research and followed the instructions and it got set up without any issues. Right now I'm just running it in my garage on a single outlet and have been running dual 750 watt water distillers with it. Once I get the second inverter and a bunch more panels and batteries, I plan on attaching it to my subpanel in my house that has my lights and outlets and appliances on it. Then I'll get a soft start for my AC and blower and run it on my main panel.

Jacob B

Easy Process, Genuine Support

Trying to pick the correct solar system for your needs can be very technical and frustrating. I wanted to thank Yvhan and the Portlandia Electric supply team for their patience and helpful attitudes through multiple calls. I feel like we were able to narrow it down to what worked for me and my family. My system works great and I couldn't be happier to have picked Portlandia Electric Supply.

Patrick B

Off Grid Solar Purchase

I wanted to get an offgrid solar system for years but didn’t know where to start. I found Portlandia Electric Supply on Facebook and decided to submit a quote. Within 24 hours I had a custom proposal that was almost half the price of the companies I had previously got quotes from. My wife and I decided to order online and the kit came in a timely manner and it was an easy install. Great company to work with!

James Martin

Highly Recommend

I would like to take the time to express the outstanding service that I was provided with by Portlandia Electric Supply. They provided me with all the answers to my questions, and after reviewing our quote over the phone I felt comfortable proceeding to order my kit. It’s exactly what I needed and they were there to help us over the phone when we had questions installing it. I highly recommend others in need to choose Portlandia Electric Supply.

Brian H

Solar Kit for Mobile Work Van

As a professional videographer, I needed reliable power on the go.Portlandia Electric Supply Delta Pro and roof-mounted panels were the perfect solution. Setup was easy, and the kit included everything needed. The Delta Pro powers my cameras, lights, laptop, and a small fridge with impressive battery capacity.

Keith S

Best Tech Support

You folks have been wonderful guiding me through the ins and outs of going solar. Plus your tech guys Rod and Nelson are the absolute best. They explained all the different aspects of inverters, batteries and how to keep them in top condition. Too much more to put here… but no other company has the 100% tech support you provide for your customers!

Coll A

Great Experience

My experience with Portlandia Electric Supply has been excellent. Before the sales, they answered all my questions to assure that I got what I needed. After the sales they continued to support me with answers and help. I had a warranty issue with a unit, and it was handled as well as possible. I would recommend them to anyone looking to go solar.

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Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

Shop Securely, Trusted Supplier, 100% Satisfaction

Trusted Company, Real Products, Lifetime Support

Avoid Scams, Buy with Confidence, Enjoy Peace of Mind

Manufacturer Warranty, Exceptional Service

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When you choose Portlandia Electric Supply, you’re buying real products from a trusted company with established supplier relationships. Enjoy peace of mind with 100% manufacturer warranty coverage and lifetime customer support. In an age where online shopping is fraught with risks, it’s crucial to avoid fly-by-night websites that skirt regulations. Shop with confidence, knowing you’re getting genuine quality and reliable service.

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