How Much Power Does a Solar Panel Produce? By Wattage, KW Hours, Size

Georgette Kilgore headshot, wearing 8 Billion Trees shirt with forest in the background.Written by Georgette Kilgore

Solar Panels | March 29, 2024

Man looking at a solar panel wonders how much power does a solar panel produce in watts and is there a difference between solar panel size and wattage, solar panel kwh, solar panel ratings, and average solar panel output?

Understanding how much power does a solar panel produce by wattage, kilowatt hours, size and more, can help you decide on the right size photovoltaic (PV) system for your specific use.

If you’re interested in deploying solar power as your main source of electricity, understanding your needs is the first step.

In addition to providing a baseline for your energy needs (giving you an idea of how many solar panels you require to fulfill your needs), when you understand how much power does a solar panel produce, you can also be more confident when shopping for your solar energy system.

This guide explains various solar panel options for size and energy production based on the average number of sunlight hours you receive where the system will be installed so you can know the answer to the question, how much power does a solar panel produce?

Understanding Solar Panel Wattage and How It Relates To Energy Use: How Much Power Does a Solar Panel Produce?

Before you start executing solar panel carbon offsets, you need to understand how solar panel wattage works in the first place. Simply put, the amount of energy that solar panels can produce is typically measured in watts.

This is a unit of electrical power that is often seen as the universal standard to measure the amount of electricity that is produced or used by a device in one hour.1

One crucial point is to remember to account for kilowatt-hours, or 1,000 watts of electricity used per hour.

A few other important points that relate to this concept of energy utilization are amperes and volts. These two aspects have a direct connection to watts and overall usage.

Graphics of solar panel output calculation showing a cartoon image of house with solar panels installed on its roof and the sun with a portion of it covered by cloud, with the solar panel output equation at the bottom of the image.

It is a great idea to have an idea of these concepts to genuinely know what is going on with energy utilization. Thankfully, it is usually fairly straightforward to find these simple on your device or on a label that is associated with the device.

In most cases, devices will usually require over 100 volts but below 250 volts. The difference is usually present in amperes.

Use the information presented below to see how many watts is necessary for your appliance.

Ampere x Volt = Watt

It is important to know your specific needs when looking to purchase solar panels. In addition, it is best to understand the overall watts, the power output, and the needs of your particular space, whether it is at home or at work.

The proper comparison can take place when it comes to how much power does a solar panel produce.

Graphics of watts used by common household appliances on a bar graph with the household appliances on the x-axis and the number of electricity consumption in volts and watts on the y-axis.

This table will give you further insights into the watts used by common household appliances that are judged by the usual amount of amperes and volts they require.2, 3, 4, 5 However, they are only examples.

Device Volts Amps Watts
Incandescent Light Bulb 120 0.83 100
LED Light Bulb 120 0.5 60
Ceiling Fan 120 0.5 60
Phone Charger 120 0.5 60
Laptop Charger 120 0.5 60
Coffee Maker 120 5.5 660
Electric Kettle 120 13 1560
Microwave 120 5 600
Refrigerator 120 5 600
Dishwasher 120 10 1200
Food Processor 120 12 1440
55-inch LED TV 120 0.98 118
Home AC 240 15 3600
Gaming Console 100 3.5 350
Gaming Computer 120 5 600

How Much Power Does a Solar Panel Produce? Solar Panel Wattage and kWh Depends on Various Factors

The amount of power that solar panels can produce depends upon multiple factors including but not limited to the size of the panel and the amount of sunlight that it is exposed to everyday. For instance, the smallest of solar panels would be able to produce a minimal amount of power.

Whereas, a larger-sized solar panel could produce significant amounts of energy that you can use as electricity. But in order to run at their full capacity, solar panels of all sizes will still require unobstructed access to sunlight.

In a certain portion of cases, more energy output is required to power significant devices for longer. To account for these more energy intensive needs, one is more likely to see more optimal solar panel system designs.

That is to say, more solar panels to account for the power needs.

The classification to pay attention to when it comes to solar panels is that amount of watts present therein. Armed with the right information, you can assess the ratings and their relation to solar panel kWh.

A worker working on top of a tall house to install solar panels.

(Image: 851067021)

If you want to have clarity on how much power does a solar panel produce on these aspects (wattage, kW Hours, size, and sunlight exposure), you have to take the following factors into account.

  • Wattage
  • Exposure to Sunlight
  • Hours of Use
  • Utilized Technology

You can learn more about these details below.


This aspect will denote the total number of watts that a solar panel can bring about when it reaches its maximum capacity per hour. This means that a small-sized, 100 watt solar panel can give you 100 watts of energy during an hour if it has access to direct and unobstructed sunlight.6

This is where the size of the panel comes into play.

Exposure To Sunlight

Sunlight is what makes a solar panel functional. In order to hold up to the production of its labeled watts per hour, every solar panel requires to absorb direct sunlight that is not marred by clouds or obstructed by tall structures.

Hours of Use

In essence, full utilization is necessary for best results. It is best to have the solar panel obtaining as much sunlight as possible and in a direct fashion.

If a 200 watt solar panel is able to absorb solar rays for 5 hours in a day, one can expect at least 1,000 watts at the end of that daily period.

Utilized Technology

Pay attention to the category of solar panels. If you look a little closer, you will notice that there are monocrystalline solar panels.

At the same time, there are polycrystalline panels. The former can offer more efficiency and elevated output.

Initially, it may seem difficult to calculate how much power does a solar panel produce by wattage, kW hours, size, and price. But when that initial light bulb goes off in your brain on how this energy production is assessed, you can determine the answer by throwing a quick glance at a solar panel’s labeled wattage.

From there, you can learn how to install solar panels on roof in a way that fulfills all your requirements.

Solar Panel kWh: How Many kW Hours Does a Solar Panel Produce?

Viewing the table provides you with further information on solar panel wattage and how they connect to the factors that influence how much electricity does a solar panel produce.

Solar Panel Wattage (Watts) Output at 5 hrs/day Output at 7 hrs/day
100 500 Watts 700 Watts
250 1.25 kWh 1.75 kWh
300 1.5 kWh 2.1 kWh
350 1.75 kWh 2.45 kWh
400 2 kWh 2.8 kWh

Graphics of electricity produced by solar panels on a bar graph with the solar panel wattage output on the x-axis and the value of electricity produced in kilowatt-hour on the y-axis.

The information presented above denotes the solar panel’s projected energy production at full efficiency.

Again, it is important to realize that these figures account for when everything goes right. If there are issues such as lack of direct sunlight, it can lower the output.

There are different examples such as cloudy days and other factors that can impact the direct sunlight absorption.

Retaining this information in mind helps you determine how many kW hours does a solar panel produce at full capacity and how they can be affected by certain factors.

Once again, while a 100 watt solar panel will be smaller than a 400 watt solar panel, you should not pay as much attention to their size as you should to their labeled wattage when judging their maximum output. The size of the solar panel matters when you are about to install them at your property, which is why you should discuss your space availability as well as your solar panel size and wattage with your solar panel provider before your purchase.

This helps you execute proper planning for a solar energy system for residential or commercial use.7

What is the Average Solar Panel Output Per Day?

A few key points to account for when it comes to overall output per day is solar panel wattage and the sunlight present throughout the day.

Typically, a 250 watt solar panel running at its maximum efficiency for 7 hours a day can provide you with 1.75 kWh of output.

Again, it will depend on the sunlight and the positioning of the panel.

DIY pergola for solar panel made of wood.

(Image: SayCheeeeeese22)

Dive into further reading on the pros and cons of solar energy to determine the average solar panel output that can meet your needs. This helps you learn how much power does a solar panel produce by wattage, kW hours, size, and sunlight exposure.

How Much Electricity Does a Solar Panel Produce?

The amount of electricity that a solar panel can produce depends upon its maximum wattage and sunlight exposure. If your solar panel is not obstructed by shades or clouds, it can easily produce its labeled wattage every hour that it gets optimal sunlight.

You can use this information to consider how much power does a 400 watt solar panel produce at compromised capacity as compared to a 100 watt solar panel at full efficiency.

How To Test a Solar Panel

A simple way to do so is to study how to use a multimeter to test the overall effectiveness of your respective solar panel.18 Remember to account for its positioning and relation to the sun.

By knowing how to test a solar panel, you can easily determine if you are getting the expected output from your solar panel.

What Is the Average Solar Panel Size and Wattage?

The average solar panel size for home use is around 65 x 36 inches. At this size, you can easily find solar panels at 250 watts and 300 watts.

Account for the aspects and ensure to set aside the right amount of space on your rooftop to install your solar energy system.

How Many 250 Watt Solar Panel for AC Unit Do You Need?

How much solar panel for ac unit to function? This is an important question to answer because people rely significantly on AC units within the United States and a few other key countries.

If you are used to these units, it can be very difficult when they are not present or have issues. Different homes and businesses will have different AC unit needs.

Numerous solar panels installed on an inclined side of the mountain.

(Image: Moritz Kindler23)

In general, it is essential to note that these units will require 1,200-3600 watts to function for an hour.

Alternatively, an average solar panel output per day for a 250 watt sun roof panel that lasts for 7 hours at maximum efficiency is about 1.75 kWh.  As such, you will likely need to account for several solar panels to run your unit at the right capacity levels.

If your AC wattage is higher than 1500 watts, you may need more solar panels to power it. This is where you may want to consider how solar panels are disposed of once they have lived their age,17 so you can make an informed decision about installing a large amount of these panels at your home.

How Many Solar Panels To Power a House?

So, how many solar panels to power a house? The amount of solar panels that it takes to power a house completely depends upon the household’s requirements and the appliances that it needs to run.

In order to determine how many solar panels you will need to power your home, you can make a list of your electric fixtures, devices, and appliances. From there, you can either calculate their wattage yourself or discuss the details with a solar panel provider.

You can estimate how many solar panels you’ll need using this solar panel calculator.

This helps you discover how you can adopt solar energy for your home according to your specific needs.

Solar Panel Output Calculation: What Will a 100 Watt Solar Panel Run vs. 250 Watt, 300 Watt, 350 Watt, and 400 Watt?

What will a 100 watt solar panel run depends upon the amount of energy that panel has produced throughout the day and the amount of electricity that your devices require in order to become functional.

Typically, a 100 watt solar panel that has produced 500 watts in a day can run LED light bulbs, phone charger, laptop charger, and ceiling fan for a few hours.

But if it has only produced 100 watts of energy in a day, your solar power may only last for an hour or two. This is where it becomes crucial that you store the energy produced by your solar panel into a battery.

There are multiple benefits to adding battery storage to your solar energy system.8

  • You can collect produced energy to power higher wattage appliances.
  • You can use the produced solar energy after sunset.
  • You can utilize previously-stored solar energy on cloudy days.
  • You can witness lower energy bills by increasing the hours of solar energy utilization.

The next crucial aspect is knowing how to conduct comparisons when it comes to particular solar panel production. If you want to know how much power does a 100W solar panel produce as compared to 250W, 300W, 350W, and 400W solar panels, study the table below.

The table presents the different kinds of devices that you can run single-handedly or combined with other devices based on your solar panel’s daily production delivery.

It is important to note that the overall information can vary based on the total operation per device, the powered capacity, and how you are using it.

Woman using a tester to check if the solar panel works.

(Image: Jackery Power Station24)

Please note that the devices present in the previous tier for a lower solar panel wattage can also be run by solar panels of a higher wattage. Do recall that these are just estimated figures.

Depending upon the devices you have and the energy storage methods that you use, these examples can vary. Due to this reason, you should compare solar panel output calculation with the specific requirements of your property.

Solar Panel Wattage (Watts) Daily Output Examples of Support Devices
100 700 Watts Lightbulbs, phone, tablet, and laptop chargers, ceiling fan
250 1.75 kWh Microwave, coffee maker, refrigerator, LED TV, gaming console/PC
300 2.1 kWh Electric kettle, food processor, dishwasher
350 2.45 kWh Home AC, electric stove
400 2.8 kWh Blow dryer

Graphics of supported devices by solar panel wattage on a bar graph showing gadgets and household appliances cartoon images with daily electricity consumption on kilowatt-hours on the x-axis and the wattage of solar panels in watts on the y-axis.

By learning this information, you can not only learn how much power does a solar panel produce by wattage, kW hours, size, and sunlight exposure, but also determine how it can benefit your household or workplace in the long run.9

What Will a 100 Watt Solar Panel Run at Full Efficiency?

A 100 watt solar panel can typically run the following devices at its full efficiency.

  • LED light bulb
  • Ceiling fan
  • Phone charger
  • Tablet charger
  • Laptop charger

How Much Power Does a 500 Watt Solar Panel Produce?

Solar panels with 500 watts can typically deliver about 3.5 kWh per day.

However, it cannot reach these figures if the conditions for receiving unobstructed daylight are not met throughout this time.

This answers the question, how much power does a 500 watt solar panel produce?

Average Wattage by the Size of Standard Solar Panel

While determining solar panel wattage, you need to look at the labeled wattage by the manufacturer rather than the size of standard solar panel. It is because different manufacturers and technologies can influence how much wattage can a solar panel produce in similar sizes.

Solar panels installed to be used by a masssive building.

(Image: Manny Becerra20)

Keeping this in mind, you should only pay importance to the size when you are calculating how much space you have on your property to install your solar energy system. With that being said, size does play a role in determining the wattage of solar panels.

If you want a general idea about these factors, you can look at the following table that gives you examples of average solar panel sizes according to their offered wattage.10,11,12,13,14

Solar Panel Wattage (Watts) Average Size (Inches)
100 48 x 22
250 66 x 36
300 65 x 39
350 67 x 40
400 78 x 39

These details help you determine how much power does a 300 watt solar panel produce in its bigger size as compared to that of a 100 watt solar panel in a much smaller size.

Based upon your space availability, you can make an informed decision about installing these solar panels at your property.

Can You Start Charging Tesla With Solar Panels?

You can start charging Tesla with solar panels if you provide enough power for the wall charger to operate.

The required wattage depends upon your Tesla model.

Low angle photo of a charging stop powerd by solar panel.

(Image: Kindel Media 25)

But typically, Teslas can provide you with 100 miles on a 34 kWh charging session.19

Since a 400 watt solar panel can provide you with a daily output of 2.8 kWh at its maximum efficiency, you may require at least 15 400 watt solar panels to gather enough juice to charge your Tesla. But seeing that this solar panel wattage output is based upon ideal conditions, you may get a reduced amount of energy from your solar panels at times.

This may require you to get even more solar panels to charge your Tesla.

To ensure that your solar energy system can power your electric vehicle, you can discuss your requirement with a solar power system provider. This can help you get personalized advice right according to your Tesla model and the weather conditions that your solar panels have to operate within.

By Learning About Solar Panel Wattage, You Can Take a Big Step Towards Sustainability

Going through these details can help you learn how many kW hours does a solar panel produce. From there, you can ask your solar power system provider the right questions before installing these systems at your property with full confidence in their solutions.

As a result, knowing how much power does a solar panel produce remains one of the most important steps toward embracing a sustainable lifestyle.

Frequently Asked Questions About How Much Power Does a Solar Panel Produce?

What Do Solar Panel Ratings Mean?

Solar panel ratings refer to the amount of DC watts that a solar panel can produce in optimal conditions that include maximum sunlight from the sky and no structural shades between the panel and sunlight. This lets you choose between differently-categorized solar panels such as those that are available in the capacity of 100 watts, 250 watts, or 300 watts.

How Much Power Does a 50 Watt Solar Panel Produce?

You may ask, how much power does a 50 watt solar panel produce? When all aspects are accounted for, one can expect to have 350 watt production on a daily basis.

How Much Power Does a 100W Solar Panel Produce?

Note that a 100 watt solar panel can bring about approximately 700 watts of power on a daily basis.

How Much Power Does a 300 Watt Solar Panel Produce?

All things considered, at 7 hours per day, a solar panel with 300 watts may provide you with an approximate 2.1 kWh of power a day. Recall, the solar panel wattage is all about proper overall utilization.

How Much Power Does a 400 Watt Solar Panel Produce?

A 400 watt solar panel that obtains the proper light 420 minutes per day can typically produce 2.8kWh per day.

What Is the Average Solar Farm Income per Acre?

The average solar farm income per acre depends upon how much power does a solar panel produce by wattage, kW hours, size, and sunlight exposure. A great resource  to turn to is a solar farm income per acre calculator to obtain the right information to address your needs.

Read More About How Much Power Does a Solar Panel Produce


1University of Illinois Urbana-Champaign. October 22, 2007. Watts and Volts. Watts and Volts | Physics Van | UIUC. April 3, 2023. Web. <>

2Electrical Safety First. n.d. Home Appliances: Amps And Watts Ratings. Home Appliances Ratings | Electrical Safety First. April 3, 2023. Web. <>

3Daft Logic. n.d. List of the Power Consumption of Typical Household Appliances. Power Consumption of Typical Household Appliances. April 3, 2023. Web. <>

4Dixon, Taylor. November 5, 2020. PlayStation 5 Teardown. PlayStation 5 Teardown – iFixit. April 3, 2023. Web. <>

5A. Dutton, John. n.d. Energy Conservation for Environmental Protection. Energy Use of Home Appliances, Page 3 | EGEE 102: Energy Conservation and Environmental Protection. April 3, 2023. Web. <>

6U.S. Department of Energy. n.d. Passive Solar Homes. Passive Solar Homes | Department of Energy. April 3, 2023. Web. <>

7Federal Trade Commission. June 2015. Solar Power for Your Home. Solar Power for Your Home | Consumer Advice. April 3, 2023. Web. <>

8U.S. Department of Energy. November 22, 2021. Should I Get Battery Storage for My Solar Energy System? Should I Get Battery Storage for My Solar Energy System? | Department of Energy.  April 3, 2023. Web. <>

9National Renewable Energy Laboratory. n.d. Solar Energy Basics. Solar Energy Basics | NREL. April 3, 2023. Web <>

10Chad. November 27, 2019. What is a 100-Watt Solar Panel Useful for? What is a 100-Watt Solar Panel Useful for? &bull; Solar Electric Contractor In Seattle WA | (206) 557-4215. April 3, 2023. Web. <>

11Marsh, Jacob. July 5, 2020. 250-watt solar panels: are they right for you? 250-Watt Solar Panels: Are They Right for You? | EnergySage. April 3, 2023. Web. <>

12Green Living Nation. n.d. All You Need To Know About 300 Watt Solar Panels. All You Need To Know About 300 Watt Solar Panels – Green Living Nation. April 3, 2023. Web. <>

13A1 Solar Store. n.d. 350 Watt Solar Panels. 350 watt solar panel for sale | Buy for home, boat and RV – A1 Solar Store. April 3, 2023. Web. <>

14Metaye, Romain. January 28, 2023. 400 Watt Solar Panel (Everything you need to know). 400 Watt Solar Panel (Everything you need to know) – Climatebiz. April 3, 2023. Web. <>

15ENERGY STAR. n.d. Rooftop Solar. Rooftop Solar | ENERGY STAR. April 3, 2023. Web. <>

16Illumine. October 5, 2021. HOW MANY SOLAR PANEL DO I NEED TO RUN AN AC. How Many Solar Panels to Run an AC | Solar Panels for AC. April 3, 2023. Web. <>

17United States Environmental Protection Agency. Updated: August 28, 2022. End-of-Life Solar Panels: Regulations and Management. End-of-Life Solar Panels: Regulations and Management | US EPA. April 3, 2023. Web.

18University Of North Carolina At Asheville. n.d. Using a Multimeter. Multimeter Tutorial. April 3, 2023. Web <>

19Decker, Brett. January 5, 2023. How much electricity does it take to charge a Tesla? How much electricity does it take to charge a Tesla? — Lectron EV. April 3, 2023. Web. <>

20Manny Becerra. Unsplash, Retrieved from: <>

218510670. Pixabay, Retrieved from: <>

22Vermont Law School Solar Panel Array  Photo by SayCheeeeeese / CC0 1.0 Universal (CC0 1.0) Public Domain Dedication. Cropped, Resized and Changed Format. From Wikimedia Commons <>

23Moritz Kindler. Unsplash. Retrieved from: <>

24Jackery Power Station. Unsplash. Retrieved from: <>

25Kindel Media. Pexels, Retrieved from: <>