Best 400 watt panels: How to get them, and What you need to know

400watt 405watt 410watt 108cells Half Cut Mono black Solar Panel for sale

As the demand for environmentally friendly, efficient energy capture in our world explodes. Solar energy has become a popular solution, and for good reason: they are a renewable, cost-saving resource, easy to install, etc.

Just five years ago, the biggest solar panels were barely 300 watts.But with rapid technological advancements, 400 w panels are becoming the most common (and preferred) solar panel rating.400 watt solar panels are being used in a rising share of residential solar installations.

Advances in solar cell technology have led to an increase in the size of solar panels.But when it comes to solar panels, does size really matter?For most homes, 400-watt solar panels offer a good balance between affordability and efficiency. They’re big enough to provide significant energy savings, but not so large that they’re unaffordable or difficult to install.

You will find the essential specifications of the best 400 watt solar panels. With the help of these highly productive solar panel, solar power can be collected anywhere in the world for many years and without any harm to the environment. These powerful solar panels become more and more popular, and you can find 400 watt solar panels for sale in our company as well.


What is a 400 watt solar panel?

One 400 watt solar panel produces an output of 400 watts of electricity under ideal Standard Test Conditions (STC), and it can be used for both commercial and residential solar projects. 

400 watt solar panels are considered a mid-level tier; they can generate enough power to cover most small electronics and appliances, while avoiding the price tag of some of the bigger, more industrial-sized arrays.


Types of 400 watt solar panels

When choosing the solar panel 400W, first you should look at its photo elements. There are mainly two choices: mono and polycrystalline cells.The polycrystalline solar panels from the older generations were far less efficient than today’s monocrystalline options, and could generate much less power in the same size. Monocrystalline panels will be more expensive and monocrystalline modules will produce more energy.



In general, 400-watt solar panels are a popular choice for homeowners and businesses because they offer a good balance of both price and performance.

The size and shape of a solar panel can vary depending on the manufacturer. Most panels measure about 1.7m by 1.2m and weigh approximately 21.5kg. This makes them relatively easy to install, and they can usually be mounted on a roof or other surface using standard hardware.

Here’s a our company sheet for an 400 watt solar panel:

  • Maximum power (Pmax): 400 watts
  • Open circuit voltage (Voc): 37.1 volts
  •  Short circuit current (Isc): 13.8 amps
  •  Cell type: Monocrystalline
  •  Frame: Anodized aluminum
  •  Dimensions: 1722*1134*30mm
  • Weight: 21.5kg


How much power can a 400 watt solar panel produce?

Electricity production varies depending on a number of factors, including location, climate, and panel angle. Under ideal conditions, a 400 watt solar panel produces 400 watts.However, in general, you can expect a 400-watt solar panel to produce somewhere in the neighborhood of 1 kWh to 2 kWh of energy each day.

In fact, the PSH describes the intensity of sunlight in a specific area, defined as an hour of sunlight that reaches about 1,000 watts of power per square meter.

Peak Sun Hours Calculator

The peak sunlight hours for your particular location will have a direct impact on the energy you can expect your home solar system to produce. we see that sunny Tucson, Arizona gets 7.5 – 7.9 PSH. That is more than twice the sunlight that rainy Seattle, Washington gets – which is only 3.3 – 3.9 PSH. That doesn’t mean a Seattle homeowner can’t go solar; it just means the homeowner would need more panels.

Other factors that affect solar panel power output,see:installation location,panel orientation, and panel tilt.

Some of the factors that affect your production are shown below:

  • The direction your panels face
  • The intensity of the sunlight that hits the panels
  • The hours of daylight in your area
  • The weather, including the average number of cloudy days per year
  • Shading on your property from trees or nearby buildings
  • The brand of the panel you choose and its maximum efficiency
  • The age of your panel, as they lose efficiency over time


What can 400 Watt solar panel run?

What will a 400 watt solar panel run? That’s a good question to ask. Using the 1,600-2,400 Wh of energy produced per day for 4-6 PSH, you can power:

  • Small televisions (up to 32″)
  • Printers,
  • Laptops
  • Cell Phones
  • Cameras
  • MP3 Players
  • Gaming Consoles
  • Lights/Lamps
  • Portable Stereos

If you’re looking to be a bit more creative, a 400-watt solar panel could even power an average-sized RV on a camping trip,or power your boat.Generally, singular 400-watt solar panels are middle-of-the-road in terms of their capacity. That said, you’ll run into problems with more energy-intensive appliances like washing machines, dryers, or microwaves.So, it’s more common for RVs, boats, and similar setups to use 400-watt starter kits. 


Advantages of 400 Watt solar panels

  • Absorb more lightIn addition to energy efficiency, black panels also absorb more light than blue ones. This leads to more energy being produced for your home or business. 
  • The Aesthetics:Homeowners are gearing towards all-black solar panel installations due to their sleek all-black appearance. These solar panels look good on any and every rooftop.
  • Excellent power output even in low light conditions.
  • Better efficiency thanks to half-cut cell configuration.
  • Low degradation rate.
  • etc.

How much does 400W solar panel cost?and how to get them?

It depends on the brand of the 400W solar panel.

Though prices vary depending on your specific region, the current cost of a 400-watt solar panel is roughly $0.23 per watt  without shipping and installation costs.The cost of solar panels rated for 400 W output can be anywhere between $2 and $4 per watt installed. Remember that this is the price of the entire solar power system, installed using a number of 400 W mono solar panels together.

To some, this may look steep; however, keep in mind that a solar panel is a long-term investment that both pays for itself and has remarkable environmental benefits.

The best way to choose a 400 W solar panel is to narrow down your needs and preferences and choose the product that has the optimum balance between cost, features, efficiency and warranty.

Can I use 400-watt solar panels for my home? 

Yes. You can wire together several individual 400-watt panels to build the solar system size you need. 

400 Watt solar panels are suitable for solar panel systems on the roof of your home. Due to their size and weight, they are both practical and cost effective in most residential solar situations.A typical 5 kW home solar system, for instance, would be built by installing fifteen (12) 400 watt solar panels on the roof. 


How Many 400 Watt Solar Panels Do I Need to Power My Home?

The number of solar panels you’ll install depends on the amount of electricity you want to generate and the space available for solar panels. Most homeowners installing a solar energy system on their roof will require between 15 and 30 400-watt solar panels, assuming they are installing systems between 6 kW and 12 kW in size. 

6 kW
7 kW

How much space will a solar energy system using 400W panels take on your roof ?

When you are installing a complete solar power system, the roof space required for your system depends more on the total system size than the individual panel size.

As a thumb rule, every kilowatt (kW) of a solar power system requires about 75 square feet of space. Therefore, a typical 6 kW system may need around 450 sq. ft. of roof space. But if we had to calculate using 400 W panels only,Consider the space required for safety shelves, sink boxes, wiring and the remaining space between panel strings to avoid shading. Thus we have:

Panel size x 120% = actual size needed

here’s System size comparison table:


6 kW
7 kW

It is important to remember that these are basic calculations and general thumb rules which may or may not apply in every case. Based on the complexity of your roof and other factors encountered in solar installations, your system may need more, or sometimes less space. That’s why it’s best to connect with an experienced solar installer to figure out your solar needs.