One of the largest solar panels available is a 400 watt panel.

These are rather recent.

The use of panels of this scale was not feasible until a few years ago.

However, solar panels are becoming larger and more effective thanks to modern technologies.

This size of panel is ideal for home electricity.

400-watt solar panels may be connected to power a whole home.

You need to be familiar with a few fundamentals in order to truly appreciate what you can get out of a panel this size.

Let’s start with the fundamentals.

  • A 400-watt solar panel cannot continuously output 400 watts. This power rating represents the device’s maximum output under ideal conditions.
  • Multiple transmission and conversion losses that a solar power system must endure prevent it from operating to its full capacity under real-world circumstances.
  • If you wish to use your power system to its best potential, a battery is essential.

A 400-Watt Solar Panel’s Dimensions And Weight

The dimensions of a 400-watt solar panel are around 80 × 40 x 1.5 Inches (202.4 x 102.4 x 4 cm), which equates to a length and breadth of almost 6.5 feet and more than 3 feet, respectively.

With various brands, you might anticipate a few minor size differences.

A 400-watt solar panel is 20kgs or 44lbs in weight.

Price of a 400 Watt Solar Panel

In addition to being more costly overall than smaller panels, 400-watt solar panels also cost more per watt of electricity.

Their more expensive price is a result of their expensive production technique.

You may definitely anticipate paying a 10% premium for these panels.

Since 400-watt solar panels are more expensive and larger, most customers choose other configurations such combining many 100-watt or 300-watt panels until they get the needed power output.

How Much Electricity Is Generated By A 400W Solar Panel?

Your position affects a 400-watt solar panel’s real power production.

You can get a reasonably accurate approximation, however.

The power output of a solar panel may be determined using a simple formula.

E = A * r * H * PR

E = Energy (Kwh)

A = Area of your solar panel (m2)

r=solar panel yield or efficiency (15%)

H= Average annual solar radiation on tilted panels

PR= Performance ratio (Average Value = 0.75)

To make things simpler, we’ve collected information from every state and determined the average amount of electricity you may obtain every day.

The power output you are going to get might vary from these typical values shown by these numbers.

Code State/Province Average Annual Solar resource in kWh/m2/day Average Daily Solar Power in Watts
AL Alabama 5 1150
AK Alaska 3.5* 805
AZ Arizona 7.1 1633
AR Arkansas 4.45 1023.5
CA California 7.2 1656
CO Colorado 6.2 1426
CT Connecticut 4.5 1035
DE Delaware 4.7 1081
DC District of Columbia 4.7 1081
FL Florida 5.3 1219
GA Georgia 5 1150
HI Hawaii 6.5 1495
ID Idaho 4.7 1081
IL Illinois 4.6 1058
IN Indiana 4.3 989
IA Iowa 4.7 1081
KS Kansas 5.7 1311
KY Kentucky 4.45 1023.5
LA Louisiana 5.2 1196
ME Maine 4.3 989
MD Maryland 4.55 1046.5
MA Massachusetts 4.5 1035
MI Michigan 4.25 977.5
MN Minnesota 4.7 1081
MS Mississippi 5.2 1196
MO Missouri 4.8 1104
MT Montana 4.6 1058
NE Nebraska 5.4 1242
NV Nevada 6.4 1472
NH New Hampshire 4.4 1012
NJ New Jersey 4.5 1035
NM New Mexico 7 1610
NY New York 3.9 897
NC North Carolina 5 1150
ND North Dakota 4.9 1127
OH Ohio 4.2 966
OK Oklahoma 5.9 1357
OR Oregon 5.4 1242
PA Pennsylvania 4 920
RI Rhode Island 4.7 1081
SC South Carolina 5.2 1196
SD South Dakota 5.2 1196
TN Tennessee 4.7 1081
TX Texas 6 1380
UT Utah 6.2 1426
VT Vermont 3.9 897
VA Virginia 4.7 1081
WA Washington 4.5 1035
WV West Virginia 4.2 966
WI Wisconsin 4.4 1012
WY Wyoming 5.6 1288

A 400 Watt Solar Panel Can Power What?

As you can see, the typical daily power production of a 400-watt solar panel in the United States varies from around 805 Wh/day to more than 1656 Wh/day.

1150 Wh/day is what we get if we average all all the numbers in the table.

Please be aware that power outputs come in two flavors: immediate power and cumulative power.

400 watts are used to signify instantaneous power.

Under cumulative power, we have estimated the daily power production.

The capacity of your solar panels depends on the amount of electricity generated.

Device Power Run time (If You Used Only One Device)
60 Watt Bulb 60W 19 Hours
LED 6W 192 Hours
Cell Phone  5W 230 Hours
Laptop 42W 27 Hours
Fridge 80W 14.4 Hours
DC Fridge  170W 6.8 Hours
Heater  1000W 1.15 Hours
Booster Pump 60W 19 Hours
Blender 500W 2.3 hours

Can A Refrigerator Be Powered By A 400-watt Solar Panel?

Yes, a mini fridge (80 watts) or a DC fridge may be powered by a 400-watt solar panel (170 watts).

To do so, however, you will need a battery, and you can anticipate a runtime of around 14.4 hours for an 80W fridge and 6.8 hours for a DC fridge every day.

Please be aware that depending on your location, the weather, and use, these numbers may change significantly.

Can An Air Conditioner Be Powered By A 400-watt Solar Panel?

An air conditioner may run for a brief period of time using a 400-watt solar panel.

RV air conditioners often employ smaller models with 1000–1500 watt power ratings.

You can only operate an air conditioner for 46 to 1.15 hours on a daily charge of 1150 Wh, so that is not a viable alternative.

Final Reflections

The installation of a 400-watt solar panel to your house or RV may be fantastic.

Most appliances may be used without any issues.

With enough sunshine, you can easily power an entire house with a couple 400-watt solar panels together.

Updated on

Written by Bob Matsuoka
Bob Matsuoka is a blogger and founder of RVing Beginner blog. He has been blogging for over five years, writing about his own family’s RV adventures, tips for people who are interested in buying an RV or taking their family on an adventure by RV.