400w monocrystalline solar panels
400w solar panels
500wh electricity
higher efficiency and longer service life
increased efficiency
reliable and durable
easy to install
power your adventure
module type
solar panel size
400w solar panels
Solar Panels scenarios
400w monocrystalline solar panels
400w solar panels
500wh electricity
higher efficiency and longer service life
increased efficiency
reliable and durable
easy to install
power your adventure
module type
solar panel size
400w solar panels
Solar Panels scenarios

12V 400 Watt Monocrystalline Solar Panels High-Efficiency Module

Regular price $382.99
Sale price $382.99 Regular price
Unit price
About this item

  • 9BB TECHNOLOGY】- The 400 watt solar panel utilizes industry leading 9-bus technology, which significantly reduces the risk of micro-cracking and provides a longer lifespan than solar panels with 5BB technology. This 9BB 400W solar panel can even lower the operating temperature by about 2°C/35.6°F, thus optimizing module performance.
  • High Efficiency Conversion】- The 400W monocrystalline solar panel expands the light receiving area to achieve a high conversion efficiency of 22-23%, surpassing most traditional solar cells. Under 5 hours of direct sunlight, our 12V 400 watt solar panel can generate up to 500Wh of electricity per day.
  • Low light environment】- Bypass diode effectively reduces power loss due to shadows and eliminates hotspots, ensuring excellent performance in low light environments.
  • Ruggedness】- Anti-reflective, high transparency, low iron content tempered glass is used to enhance rigidity and impact resistance.IP65 rated junction box and MC4 connectors allow you to avoid worrying about splashing water and rain. The corrosion-resistant aluminum frame provides protection for long-term outdoor use, ensuring that the panel will last for decades.
  • Easy Installation 】 - The 400 watt solar panel comes with pre-drilled holes for quick and safe installation. Compatible with Z mounts and tilt mounts, perfect for RVs, boats and other outdoor equipment.
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  • Estimated Delivery:Jul 20 - Jul 24

  • Free Shipping & Returns: On all orders over $100

400w monocrystalline solar panels

12V 400 Watt Monocrystalline Solar Panels High-Efficiency Module

Regular price $382.99
Sale price $382.99 Regular price
Unit price
Description
Shipping and Refund
Warranty Policy

400W Solar Panel

400W solar panel with 4 integrated 100W high-efficiency modules, using 9BB technology to reduce the risk of micro-cracking and improve life and performance. Highly efficient conversion of solar energy, 22-23% conversion rate ensures strong power output. Excellent performance in low-light environment, durable and adaptable to various harsh environments. Pre-drilled holes for easy installation, compatible with a wide range of mounting systems. Quality assurance, providing stable and reliable power support for your outdoor life

Upgrade to 100 Watt 9BB Solar Panels for More Power Output

The 9 busbars technology provides higher efficiency and longer service life. Grade A+ mono solar cells offer 22-23% high efficiency and generate more current. Upgrade to HQST 100 watt 9bb solar panels for better performance, reduced risk of cracks, and lower working temperatures

100w 9bb solar panel

9BB Grade A+ Cells

9BB Grade A+ Cells

Thickened Alum-Alloy

Thickened Alum-Alloy

Thickened Glass

Thickened Glass

Built to Last

Built to Last

Outstanding Durability & Better Performance

Outstanding Durability & Better Performance

FAQ

  1. Q: What scenes is this 400W solar panel suitable for?
    A: This solar panel is suitable for a variety of scenarios, including RVs, boats, outdoor campgrounds, solar power stations, etc. It provides stable and reliable power support for a variety of outdoor and mobile energy needs.
  2. Q: Can this solar panel work in bad weather?
    A: Yes, this solar panel is made of corrosion-resistant aluminum frame and tempered glass panels, with excellent wind and snow resistance and waterproof performance, it can work normally under all kinds of harsh weather conditions.
  3. Q: How do I need to install this solar panel?
    A: Installing this solar panel requires some specialized knowledge and skills. We recommend that you consult a professional installer or refer to the installation guide in the product manual for installation. Meanwhile, we also provide mounting brackets and accessories for you to choose from, so that you can install it more conveniently.
  4. Q: What is the maintenance cost of this solar panel?
    A: The maintenance cost of this solar panel is relatively low. Due to its rugged design and high-quality materials, it rarely needs to be repaired or replaced. However, to ensure its long-term stable operation, we recommend that you regularly inspect and clean the surface of the solar panel to maintain its efficient performance.
  5. Q: How can I connect multiple solar panels to form a larger power system?
    A: You can connect multiple solar panels in parallel or series to form a larger power system. Connecting in parallel increases the total current, while connecting in series increases the total voltage. The exact connection depends on your power requirements and installation conditions. Please consult a professional electrical engineer or refer to the product manual for more advice on connection methods.

TOPBULL Shipping and Refund Policy

Shipping Policy:

1. Shipping Methods:

We have local warehouses in the United States and Europe, North American orders will be shipped from the U.S. warehouse, European orders will be shipped from Germany or Italy, all packages will arrive at the customer in 3-10 days after shipment. We offer several shipping methods to meet your delivery needs. The shipping options and estimated delivery dates will be provided during the checkout process.


2. Order Processing Time:

Please allow 1-3 business days for order processing. Once your order has been shipped, you will receive a confirmation email with tracking information.


3. Shipping Rates:

Shipping rates are calculated based on the weight of your order and the selected shipping method. The total shipping cost will be displayed during the checkout process.

Country Estimated delivery time Order 0-100 USD Shipping Rates Order above 100 USD Shipping Rates
USA 3-15 Natural Days 10 USD 0
Canada 3-15 Natural Days 10 USD 0
United Kingdom 3-15 Natural Days 10 USD 0
France 3-15 Natural Days 10 USD 0
Germany 3-15 Natural Days 10 USD 0
Italy 3-15 Natural Days 10 USD 0
Spain 3-15 Natural Days 10 USD 0
Australia 3-15 Natural Days 10 USD 0


4. Free Shipping Policy:

For orders over $100, we offer free shipping.


5. International Shipping:

We currently offer international shipping to select countries. International shipping rates and delivery times vary. Customs and import duties may apply and are the responsibility of the customer.

We currently ship to the United States, Canada, United Kingdom, France, Germany, Italy, Spain, and Australia (excluding islands and remote areas).

6.Customs Duty


All customs duties and taxes are the responsibility of the consumer, the specific cost of each country's customs policies


7. Tracking Your Order:

You can track your order by using the tracking number provided in the shipping confirmation email. If you have any issues with tracking your order, please contact our customer support.


Refund Policy:


1. Returns:

We accept returns within 30 days of the purchase date. To be eligible for a return, the item must be unused and in the same condition as received. It must also be in the original packaging.


2. Refund Process:

Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.


3. Refund Timeframe:

Refunds will be processed within 7-10 business days of receiving the returned item. The refund will be issued to the original payment method.Refunds will be returned to your account within 3-15 business days after we initiate them.


4. Exchanges:

If you need to exchange an item, please contact our customer support service@topbullshop.com. Exchanges are subject to product availability.


5. Return Shipping:

Customers are responsible for return shipping costs unless the return is due to an error on our part.


6. Damaged or Defective Items:

If you receive a damaged or defective item, please contact our customer support immediately. We will provide instructions on how to return the item for a replacement or refund.

TOPBULL warranty

1. Limited Warranty:

TOPBULL offers a limited warranty on all products against defects in materials and workmanship under normal use for a period of 1 year. The warranty period starts from the date of purchase.


2. Warranty Coverage:

This warranty covers defects in materials and workmanship of the product under normal use. It does not cover damage caused by accident, misuse, neglect, unauthorized modifications, or any other circumstances beyond normal wear and tear.


3. How to Claim Warranty:

To initiate a warranty claim, please contact our customer support at service@topbullshop.com within the warranty period. Provide your order number, a detailed description of the issue, and, if possible, attach relevant photographs.


4. Evaluation and Resolution:

Our customer support team will evaluate the warranty claim and determine the appropriate course of action. This may include repair, replacement, or refund at the discretion of TOPBULL.


5. Return of Defective Product:

If requested, you may need to return the defective product. Instructions for the return process will be provided by our customer support team. Customers are responsible for the cost of returning the item.


6. Exclusions:

The warranty does not cover normal wear and tear, damages resulting from improper maintenance, unauthorized repairs, or modifications. It also does not cover incidental or consequential damages.


7. Warranty Transferability:

This warranty is non-transferable and is only applicable to the original purchaser of the product.


8. Duration of Implied Warranties:

To the extent permitted by law, any implied warranties, including the implied warranties of merchantability and fitness for a particular purpose, are limited to the duration of this express warranty.


9. Additional Terms:

TOPBULL reserves the right to update or modify the terms of this warranty policy without prior notice. Any changes will be effective immediately upon posting on our website.
If you have any questions or concerns regarding our warranty policy, please contact our customer support team at service@topbullshop.com for assistance.

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