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400 Watt Solar Panels

The 400-watt panels are out of stock
Subscribe on updates — we’ll let you know when 400-watt models will be in stock. On average we update products every 2 weeks.
See also 360 - 410 watt panels May be comparable
In stock
REC 365W Solar Panel 120 cell Alpha Series PV Modules – A1SolarStore
Cell number 120 cell
DC/Charger Volt Compatible 12v, 24v, 48v
Price per Watt $0.81
Rated Power Output 365 W
Voltage (VOC) 44.3 V
Cell Type Monocrystalline
In stock
JA Solar 405w Solar Panel 72 Cell JA-JAM72-S10-405MR - A1 Solar Store
Cell number 144 cell
DC/Charger Volt Compatible 12v, 24v, 48v
Price per Watt $0.49
Rated Power Output 405 W
Voltage (VOC) 49.86V
Cell Type Monocrystalline
In stock
Mission Solar 385W 72 cell Solar Panel MSE385SR9Sl P-type mono-crystalline silicon
Cell number 72 cell
DC/Charger Volt Compatible 12v, 24v, 48v
Price per Watt $0.7
Rated Power Output 385 W
Voltage (VOC) 48.53 V
Cell Type Monocrystalline

Complete guide on solar systems

Learn how solar panels works and choose the one that suits your needs best

In stock
Trina 410W Solar Panel 144 cell TSM-410-DE15H(II) - A1 Solar Store
Cell number 144 cell
DC/Charger Volt Compatible 12v, 24v, 48v
Price per Watt $0.52
Rated Power Output 410 W
Voltage (VOC) 51.2V
Cell Type Monocrystalline
In stock
Mission Solar 390W 72 cell Solar Panel MSE390SR9S - A1 Solar Store
Cell number 72 cell
DC/Charger Volt Compatible 12v, 24v, 48v
Rated Power Output 390 W
Voltage (VOC) 48.96V
Cell Type Monocrystalline
In stock
Panasonic 360W Solar Panel 120 Cell EverVolt EVPV360 - A1 Solar Store
Cell number 120 cell
DC/Charger Volt Compatible 12v, 24v, 48v
Price per Watt $1.15
Rated Power Output 360 W
Voltage (VOC) 44.0V
Cell Type Monocrystalline
In stock
Solaria 370W Solar Panel 60 cell PowerXT - 370R-PD Monocrystallyne Black – A1 Solar Store
Cell number 60 cell
DC/Charger Volt Compatible 12v, 24v, 48v
Price per Watt $1.07
Rated Power Output 370 W
Voltage (VOC) 45.4 V
Cell Type Monocrystalline
In stock
Q CELLS 380W Solar Panel 132 cells Q.PEAK DUO BLK ML-G9+ - A1 Solar Store
Cell number , 132 cell
DC/Charger Volt Compatible 12v, 24v, 48v
Price per Watt $0.6
Rated Power Output 380 W
Voltage (VOC) 45.04V
Cell Type Monocrystalline

400 Watt solar panels

In this article, you will find the essential specifications of our most powerful and efficient 400 Watt solar panels. With the help of these highly productive modules, solar power can be collected anywhere in the world for many years and without any harm to the environment.

Types of 400w 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. Although cells are same in quality will have different performance metrics. Polycrystalline panels will be cheaper, but monocrystalline modules will produce more energy.

Choose the type of your solar PV system

Before purchasing a 400W solar panel kit, you need to decide what kind of system you want.

Off-grid with battery banks

Many homeowners prefer to install off-grid solar systems to become completely energy independent. The thing is that off-grid solar systems aren’t connected to the electricity grid, so they will continue working even if the public power grid is not functioning. However, this is only achievable with the appropriate equipment and batteries.

Grid-tight with net metering

Grid-tie solar systems, also referred to as on-grid, utility-interactive, grid intertie or grid backfeeding, are popular with both homes and businesses. They are connected to the utility power grid, which is necessary to run the PV system. It allows you to export any excess solar power you generate to the electricity grid, receive credits and use them later to offset your energy bill.

Hybrid

Hybrid solar systems incorporate the best features of grid-tied and off-grid solar systems, hence the name. Despite the fact they are connected to the utility grid, they have extra battery storage as a backup.

How many 400-watt solar panels do I need?

A 400W solar panel has a 400 watt rated power output. However, the actual power output will depend on many factors, such as geographic location, shading, weather conditions, and the tilt of your panels.

To understand how many 400W panels you need to install, you have to calculate the amount of electricity you want to consume a day. You also need to know the number of peak sun hours (PSH) in your area. 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 (around 10.5 feet). Consult the map below to learn how many PHS there are in your state.


For example, if you live in Arizona and your daily energy consumption is 9 kW, you will want your 400 W panel kit to generate 9,000 ÷ 6.3 ≈ 1,500 kW. It means that you’ll need 4 panels 400W to cover your energy needs.

What can a 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″)
  • Blender
  • Laptops
  • Cell Phones
  • Cameras
  • MP3 Players
  • Handheld Video Games
  • Lights/Lamps
  • Portable Stereos
  • CD/DVD Players

Advantages of 400 Watt solar panels

  • Excellent power output even in low light conditions.
  • Better efficiency thanks to half-cut cell configuration.
  • High efficiency at high temperatures.
  • Very-cost effective and price competitive.
  • Require fewer panels due to increased energy generation.
  • Reduced installation cost since requiring fewer panels.
  • Increased durability thanks to smaller cell size and therefore reduced probability of microcracking.
  • Low degradation rate.

The average price of 400 Watt panels

Our online store offers a few models of 400 Watt solar panels in the price range from $230 to $280.

What size of 400 watt solar panel do I need?

The exact size of a 400 watt solar panel depends on the manufacturer and the model. In general, 400 Watt solar panels have 144 half-cut solar cells with measurements similar to 72 cell solar panels. The dimensions of an average 400 Watt solar panel are about 79” X 39” X 1.4”. The 400 watt solar panel size and power output ratio make it a good option for solar installations with space constraints. The solar panels we currently offer weigh between 48 and 50 lbs.

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Frequently asked questions

Our standard shipping charge is $175 for up to 11 panels and it is increased by $25 for every 4 additional panels. In the event, the product is only available on East or West coast custom quote will be sent to you before the order is processed. Normally, we are able to deliver solar panels within 7 business days.

With top tier solar panels, you pay for the brand name, proprietary new technology, higher energy output, and better warranty support.

Please refer to the product datasheet on the product page. We have a datasheet for every product we sell.

In general, manufacturers provide a 25 year-long performance warranty and a 10 year-long equipment guarantee. Some manufacturers offer 12-15 years of warranty. More information is available in our warranty support section.

We recommend Panasonic and Mission Solar panels for smaller systems as their high energy output and excellent craftsmanship guarantee years of service.

Any of our panels can be used for a 12v system with a properly selected inverter and charge controller.

Yes, we can set up a pick up at a local distributor. Please call to discuss options and stock availability.

To achieve the best system efficiency, panels should be connected in series to create higher voltage.

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