400 watt solar panel

6 Best 400 Watt Solar Panel With Full Kit In 2024

Choosing between a 400 watt and a 500-watt solar panel may seem insignificant, but the difference impacts your demands. Deciding on the value of a 400 watt solar panel can be challenging. But do you know it’s easier than many people presume?

Before purchasing, I considered several aspects while installing a 400 watt solar panel, including my energy requirements, location, panel type, warranty, and many more. A 400 watt panel is a better option if your roof space is restricted. For the entire house, I think that is enough to produce energy for a whole house and you know how much these panels can produce energy in one day?

400-watt panels are worth the money if you can afford them. It would help if you also did the same. Contacting a sales specialist who can assist in figuring out your panel preferences can also be beneficial. I have compiled every point you need to know before purchasing.

So, Let’s Have A Look At This Best 400 Watt Solar Panel So Far:-

1. HQST 400 Watt 12V Monocrystalline Solar Panel

Who it is for: Off-grid and residential solar power systems will benefit from it the most.

Who it isn’t for: Grid-connected and small-scale solar power systems are not ideal.

hqst 400 watt 12v monocrystalline solar panel

QST 400 Watt 12V Monocrystalline Solar Panels were of excellent quality, however, they weren’t monocrystalline as their posting claimed. The data stickers on the panels revealed that the voltage is the same as the polycrystalline voltage reported in their earlier postings.

With its sturdy aluminum frame and tempered glass top, the HQST 400 Watt 12V Monocrystalline Solar Panel is also designed to survive inclement weather. It is a dependable solution for home and commercial solar power systems because it is resistant to wind, hail, and snow.

This solar panel is simple to install with mounting holes already predrilled onto the panel’s back. Additionally, it has a 25-year power output warranty and a 5-year warranty on the materials and craftsmanship, giving me peace of mind and guaranteeing that it will keep producing electricity for a very long time.

Overall, the HQST 400 Watt 12V Monocrystalline Solar Panel is a strong and trustworthy solar panel that can be applied in several ways to produce clean, renewable electricity from the sun.

Product details:-

  • Material: Tempered glass, aluminum.
  • Item Dimensions: 32.5 x 26.4 x 1.18 inches.
  • Item weight: 53.20 pounds.
  • Max voltage: 12 volts.
  • Product dimensions: 32.5 x 26.4 x 1.18 inches


  • Good packaging.
  • Affordable.
  • Good customer support.


  • Real short cords.
  • Not monocrystalline.


2. Renogy 400 Watt 12 Volt Premium Solar panels

Who it is for: It is ideal for commercial solar power systems and off-grid solar systems.

Who it isn’t for: Their size and weight may not be appropriate for temporary or portable uses, such as camping or trekking.

renogy 400 watt solar panel

The Renogy 400W 12V Premium Kit is perfect for off-grid and mobile solar power applications. It includes solar panels, charge controllers, and the electrical wiring, fuses, and monitoring generally needed for an off-grid installation.

High-efficiency monocrystalline solar cells with a conversion efficiency of up to 21.2% are used to create the Renogy 400 Watt, 12 Volt Premium Solar Panels, which are very efficient at converting sunlight into useful electricity.

A typical day’s electricity from the Premium Kit will be between 1.6 and 2.5 kWh. Notably, the 4x100W solar panels only take up a little roof space but can still provide enough power to support modest and medium-sized loads like lighting, a television, and a coffee maker.

Fortunately, they are also very simple to install, have well-built parts, and have attractive packaging. In terms of cables and fuses, the package includes everything. However, including an installation diagram would have simplified things for me.

Eventually, things made sense once I looked for them on the website. One of the best things about these panels is that the Bluetooth app lets you keep tabs on everything.

Product Description:-

  • Material: Monocrystalline.
  • Item description: 42.4 x 20.9 x 1.38 inches.
  • Item weight: 56.4 Pounds.
  • Product dimensions: 42.4 x 20.9 x 1.38 inches.
  • Warranty: Panel: 5-year material and quality warranty.


  • Effective performance.
  • High Standards.
  • Protection for the entire system.


  • The controller’s wiring is a touch undersized regarding the size.
  • A tremendously big and awkward 30-amp fuse block.
  • An additional 10-amp fuse with associated connections in the panel.


3. Solar Panel 400W, 2-Pieces 200 Watt PET Flexible Solar Panel

Who it is for: They are excellent for use in mobile applications, such as RVs and boats, where space is at a premium and rigid panels might not fit.

Who it isn’t for: They are inappropriate for use in extremely harsh environments or with large solar power systems requiring high power output.

2-pieces 200 watt pet flexible solar panel

The solar panel series is one of the main products of JPSYWJH. With all my experience, these 400-watt solar panels can make anyone’s lifestyle more convenient.

The company has approximately 20 years of production expertise, upgraded all of its products—from chips to packaging—and introduced new technological advancements. Their manufacturing process also includes strict quality control, which is quite impressive.

The JPSYWJH brand has created various power boards to address various consumer needs. I have done travel, camping, adventure, and all other possible things that can consume energy because it is easily portable. Being solar-powered also saves a lot on my electricity and battery bills.

Due to being waterproof, it can easily be used during rain without getting shocks, as I got from my previous panels.
Overall, the 400W/2PCS 200W PET Flexible Solar Panel is a flexible solar panel choice for various applications, particularly those that call for a lightweight, flexible, and portable solar panel solution.

However, these are not the best options for massive residential or commercial solar power systems that demand tremendous power production. While choosing solar panels, it’s crucial to consider the particular needs of your solar power system and the environments in which it will be utilized.

Product Description:-

  • Material: Monocrystalline Silicon.
  • Item Dimensions LxWxH: 41.73 x 10.9 x 0.11 inches.
  • Connector Type: MC4.
  • Included Components: 2 * 200w solar panel.
  • Maximum Voltage: 12 Volts.


  • A most suitable alternative for those who regularly travel and want electricity.
  • A standout display.
  • Top-notch client assistance.


  • Expensive.
  • Not very much durable.


4. BougeRV 400 Watts Solar Panel

Who it is for: These solar panels can power various things, including RVs, boats, cottages, and off-grid residences.

Who it isn’t for: It might not be appropriate for applications needing higher power output, like sizable commercial structures or industrial facilities.

bougerv 400 watt solar panel

A 30A PWM solar charge controller is included with the BougeRV 400 Watts Solar Panel to control the battery’s charging, prevent overcharging and discharging, and increase battery life. The panel also has a tough junction box that can withstand rain and snow to shield the electrical connections from inclement weather.

I did recommend BougeRV 400 Watt Solar Panels because they are of excellent quality and because of the spectacular client service provided by BougeRV.

When I purchased two of these panels and hooked them up to my power station, I found that I was getting fewer watts from them than claimed by the company. So I contacted BoughRV customer care immediately.

To my surprise, their customer care executives communicate politely and have excellent communication skills. She frequently replied to my messages within minutes (even late at night), and there was no language barrier. She sent me two more solar panels and said I could retain the original two they delivered once I gave her all the information and demonstrated the results I was getting.

Apart from this, its compact design also impressed me. Due to this, it can be easily installed even in a small apartment.

Product Description:-

  • Material: Glass.
  • Item Dimensions LxWxH: 58.27 x 26.38 x 1.4 inches.
  • Item Weight: 35.6 Pounds.
  • Connector Type: Solar connector.
  • Included Components: Battery, Solar Panels.
  • Maximum Voltage: 19.72 Volts (DC).


  • Long-lasting and robust.
  • Lightweight.
  • Weatherproof.
  • Quality concerning the source.


  • Expensive.
  • Inappropriate for households.
  • Not suitable for harsh weather.


5. ALLPOWERS SP037 400W Portable Solar Panel

Who it is for: It is appropriate for various off-grid power applications, including camping, RVing, outdoor activities, and emergency power backup.

Who it isn’t for: These solar panels might not be appropriate for applications needing higher power output, like powering sizable commercial or industrial operations.

allpowers sp037 400w portable solar panel

The ALLPOWERS SP037 400W Portable Solar Panel is intended for outdoor and off-grid applications. It is lightweight and easily transportable, making it the best option for lazy people like me. Apart from this, I also appreciate that it has a collapsible form and a handy carrying case, making it simple to transfer and put up in different areas.

Monocrystalline solar cells, which have a high conversion efficiency of up to 23%, are one of the premium components used to construct the panel. One of the smallest and lightest portable solar panels on the market, the panel has folded dimensions of 26.6 x 20.5 x 2.8 inches and unfolded dimensions of 81.3 x 26.6 x 0.2 inches.

A built-in MPPT charge controller for the LPOWERS SP037 400W portable solar panel controls battery charging to ensure maximum power production. It also has an integrated USB connector and a 12V DC output port, allowing it to work with various appliances and gadgets.

For anyone searching for a portable and dependable solar panel for their off-grid power requirements, the LPOWERS SP037 400W Portable Solar Panel is a great option. Its folding, lightweight, and high-efficiency design makes traveling with and setting up simple. Its integrated output ports and charge controller guarantee maximum power output and compatibility with various appliances and gadgets.

Product Description:-

  • Item Dimensions LxWxH: 40.94 x 23.62 x 4.72 inches.
  • Connector Type: MC4.
  • Included Components: Solar cells.
  • Maximum Voltage: 37.5 Volts.


  • Large Power Solar Panel.
  • High-Efficiency Solar Cells.
  • Waterproof and ETFE Coating.
  • Portable.


  • Very delicate.
  • Lightweight.


6. EF ECOFLOW 400W Portable Solar Panel

Who it is for: These solar panels suit off-grid power needs such as camping, RVing, outdoor activities, and emergency backup power.

Who it isn’t for: They are inappropriate for uses that call for higher power output, like supplying energy to sizable commercial or industrial operations.

ef ecoflow 400w portable solar panel

I wanted to find out how much output a second set of panels integrated into a single product could produce after learning about the EcoFlow 220W Bifacial Solar Panel. It did not impress me and needed a setting with ideal reflections to lend any significant liveliness to the main, front-facing panels.

It takes up far less room than rigid panels intended to be permanently installed and can be rapidly set up and put away because of its folding construction. Nevertheless, bending the panels at an angle of more than 30 degrees increases the likelihood of damage.

Overall, I was extremely pleased with the EcoFlow 220W’s solar charging performance for both the EcoFlow Delta Pro and Goal Zero Yeti 1500X batteries. When used in an ideal setting, the panel’s 155W backside adds a nice finishing touch by giving travelers or homesteaders extra electricity for charging.

The EF Ecoflow 400W Portable Solar Panel is a fantastic option for anyone searching for a portable and dependable solar panel for their off-grid power requirements.

High-efficiency solar cells, an integrated charge controller, and output ports guarantee maximum power output and compatibility with various gadgets and appliances. At the same time, the unit’s small weight and folding shape make it simple to travel with and erect.

Product Description:-

  • Material: Ethylene Vinyl Acetate
  • Product Dimensions: 23.2 x 20.2 x 0.8 inches
  • Item Weight: 34.2 pounds
  • Efficiency: 22.4%
  • Connector Type: MC4


  • Incredible Efficiency.
  • Water Resistant.
  • Very Portable.
  • Superior Performance.


  • Black and opaque surface.
  • No integrated USB-C or USB-C PD.


A 400-Watt Solar Panel’s Typical Price:-

The price of a 400-watt solar panel is affected by several variables. Solar energy has a lot of advantages, but it also comes at a high cost. However, if you know much about its types, you may select the most suitable one per your budget.

There are two different types of 400-watt solar panels available on the market. These are monocrystalline and polycrystalline panels. Although each type differs from the others in some ways, they each excel in particular categories.

1. Monocrystalline solar panels

It is simple to recognize monocrystalline solar panels. Their cells are entirely black, as you’ll see. For aesthetic reasons, many people favor these. Furthermore, it has long been known that black draws more light.

Since only one silicon crystal was used to make these solar panels, they are purer and perform better. Due to this, they are not only more effective but also more expensive. They are typically priced between $250 and $500 on the market.

2. Polycrystalline solar panels

Due to their low cost, polycrystalline solar panels are widely used. They are the earliest solar panel models that have a blue cell lining. The majority of solar panels that you have seen belong to this category.

Compared to monocrystalline cells, they have fewer pure crystals. Due to this, they are cheaper and come in the range of $100–250.

What Appliances Can A 400-Watt Solar Panel Power?

The 400-watt solar panel can power many medium-energy-consumption appliances that can be run at once. They use the sun to generate a substantial amount of power. Regular household appliances can be powered by a 400-watt solar panel, utilizing a decent amount of electricity.

It won’t have any issues operating a vacuum cleaner while your water cooler is on. However, large kitchen appliances like stoves and ovens won’t be able to be powered. Yet, a single 400-watt solar panel can power small and medium-sized devices. You can even charge you Tesla if these panels are fully charged.

Apart from this, I have also charged a PC or laptop from the electricity generated by a 400-watt solar panel. Many people could also watch TV, keep WiFi routers on, charge their phones, and listen to music on the radio simultaneously.

Apart from this, many people also use them to generate electricity to power security tools such as CCTV cameras, alarms, and other things because no one loves thieves and unwelcome visitors entering your property. In a power outage, a 400-watt solar panel can power lights, cameras, and a flat-screen monitor.


Frequently Asked Questions:-

  • Can indoor solar panels store energy?

No, they cannot do so because solar panels transform solar energy into electrical energy and transport it as direct current to an EcoFlow portable power station. The solar panel itself is unable to store electricity.

  • How much can a solar panel with 400W power?

A 400-watt solar panel will typically generate between 1 and 2 kWh of electricity daily; however, this varies depending on the model. Lights, televisions, mini-refrigerators, fans, and other electronics may all be powered by this, along with other appliances and gadgets.

  • How long does a 400-watt solar panel take to charge a 12-volt battery fully?

A 400-watt solar array could theoretically charge the battery in three hours, but in practice, it would take much longer due to resistance and the 15% power lost while charging. Four hours is still optimistic, but six hours of direct sunlight should accomplish the work.

  • Is an overcharge of a battery by a solar panel possible?

Although solar panels can overcharge a battery, as long as we understand them and adhere to manufacturer recommendations, this seldom happens. This page provides information on how to avoid overcharging batteries and the harm that may be done to them.


Final Words

It’s simpler than you would think to switch to solar energy. Determining the panel’s wattage size is a challenge, but life will be simple once you make this choice.

Keep your requirements, spending limit, and future costs in mind. You understood what I wrote in this article, and I hope it will help you search for your ideal 400-watt solar panel type.

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Ray is an avid reader and writer with over 25 years of experience serving various domestic and multinational private and public energy companies in the USA.

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