How Much Solar Power Will I Need?

Categories: Solar PV Panels.

How much solar power do electric appliances need?

Wherever you go in a home; a kitchen, living room, bathroom, or any area people use, you’ll find electric appliances.

electric appliances solar roof panels

With the increased use of such appliances, the demand for electricity has grown. So, how much solar power will I need?

With better technology, we are fortunate to have access to energy efficient electronic appliances.

The growing number of effective electric gadgets is mind-boggling. These appliances make it easy for us to perform our daily activities.

However, the electricity generated from fossil fuels is environmentally unpopular.

how much solar power do electric appliances need

So, it becomes difficult for a country government to boost supply to match the increasing electricity demand by duplicating older generators. They look for cheap alternative sources of energy.

For some energy supply companies that alternative energy option used to include building a nuclear plant.

Now, a large solar power station or a wind farm with grid scale battery storage is becoming favored.

How Much Solar Power Do Electric Appliances Need?

The sun is a limitless power source that is available, free to use every day.

Also this incoming energy is not a taxed commodity. A decision to install a rooftop solar system at your premises could turn into a rewarding investment. The investment would save you money while giving satisfaction of protecting your earth and its resources. It’s in the numbers; the economics of capital and operating cost and return on the investment over time.

But, many people choose wrong size of solar system when it comes to installation of solar panels. Some choose to under supply their whole electricity demand, whereas another might select the system that produces much more power than their home needs. In both scenarios there is possible wastage of money.

Before you choose a solar panel system, it is crucial to do some homework.

Do you know how much power you need for your electric appliances? It will save your money by getting the correct sized system.

Also the exercise of completing your electricity needs will help you identify where savings are possible and what these magic gadgets cost to feed each day.

How To Calculate The Power Consumption Of Household Appliances?

On the way to figuring out how much energy you require in total, determine how much power each of your appliances consume. Your power consumption is measured in watt-hours. So, you need to know the watts used by an appliance. It varies with each of the electric appliances. What is it’s size, type, time in use, and the technology of the device, etc. There are a couple of methods to know the wattage of an appliance.

  • You can check the wattage of an appliance near the AC power cord. This may be in amps or watts. If it is in amps, then knowing the house voltage; you use a simple formula:

                           Watts = Amps * Volts

  • If you don’t have enough time to make calculations and want quick answers, then another method is to use home appliance power consumption table for approximate figures or a Kill A Watt Electricity Usage Monitor. It is an inexpensive device that monitors how much power your appliance uses.

How Much Energy Will Electric Appliances Use Over A Period Of Time?

Okay, you know how many watts are required to run an appliance.  Now, determine how many hours each appliance will run each day. To calculate how much solar power do electric appliances need, check the consumption of an appliance over a period using a power consumption table or the power usage monitor. You multiply the power consumption by the hours of intended use. For instance, ignoring standby mode, your television screen consumes 20W per hour and is running for 2 hours. The total power consumption of you running your TV will be 40Wh per day. 

So, how many watts does a fridge use per day when it is cycling on and off? It will depend on many factors so using a power consumption monitor is going to provide the most accurate answer. The total household consumption will then be matched to how many kWh the solar panels produce per day to know how many solar panels you need to install.

The laundry area and kitchen of the modern house contain the bigger electricity users. Now, we are going to check out the typical annual power consumption of electric appliances used in different parts of your home.


The kitchen is the hub of a home.

how much solar power do electric appliances need

People will pay more attention to their kitchen design because it’s a place where meal preparation and cooking consumes several hours each day.

Therefore, people will spend a significant amount of money on its décor and appliances. There are countless numbers of kitchen appliances on the market. Each appliance has different power consumption. If you are planning to use your solar system for your kitchen appliances, then get the generation/ consumption match right.

The choice of solar can turn out to be the optimum decision for your home if calculations are made well. Now, you need to figure out how much power will be consumed by each appliance. Here is a power consumption table of home appliances in the kitchen.

How Much Solar Power Do Electric Appliances Need For Kitchen Applications?



Time Duration



150 to 200 W

365 days – continuously

201 kWh


1200 W

48 weeks – 5 * per week

288 kWh

Coffee machine

500 to 1000 W

335 days – 10mins./day


Cooker hood

70 to 150 W

335 days – 40mins./day

25 kWh

Microwave oven

1000 to 1500 W

48 weeks – 1.5 h/week

90 kWh

Conventional electric oven

2000 to 2500 W

48 weeks – 1.5 h/week

162 kWh


1200 W

48 weeks – 1 h/10 days

44 kWh (approx.)

Food processor blender

200 W

48 weeks – 2 h/10 days

14.6 kWh

Living Room

A living room is the area of a house where people entertain themselves and their guests. They may wish to impress visitors or wish to have the comforts of technology. Whatever the reason, they spend thousands of dollars on its furniture, interior design, and appliances. 

how much solar power do electric appliances need

How much solar power do electric appliances need in a living room?

The living room’s electric appliances are designed for function and enhance the aesthetic appearance of your living room. But, these appliances also need electricity to perform their operation. You can power your living room appliances with the solar system, but you’ll need to buy panels to match.

Choose a solar array according to their power production on a standard day of consumption. In the following table, we list the annual power consumption table of home appliances in typical living rooms.

Annual Power Consumption Table For Living Room Appliances



Time Duration



90 to 250 W

335 days – 4 hours/ day



20 to 60 W

335 days – 4 hours/ day


Low-energy light bulb

12 W

335 days – 5 hours/ day

20 kWh

Game console

20 to 180 W

387 hours/ year

7.75 to 69.5 kWh

TVD/ADSL decoder

365 days – continuously

277 kWh + 112 kWh

Halogen lamps

300 W

335 days – 5 hours/ day

503 kWh

Stereo system

40 W

335 days – 4 hours/ day


Window AC

660 W

365 days – 6 hours/ day


Laundry Room

When it comes to washing clothes, there is more than water, detergent and a machine. Care plays a role. Clothes that we wear are a form of self-expression – sometimes giving hints about you. We need to wash and iron fabrics in a proper way. Washing machines have improved and become efficient with the advancement in technology. We can use machines for washing the clothes clean, for drying them and to press and iron the items respectively.

how much solar power do electric appliances need

How much solar power do electric appliances need in the laundry? These electric appliances /tools also need electricity to perform their job. If you intend running your laundry appliances on your solar system, you must calculate the power consumption of laundry devices. Here is the annual power consumption table of home appliances in the laundry room.

Annual Power Consumption Table For Laundry Room Appliances



Time Duration


Tumbles dryer C

2500 to 3000W

32 weeks – 2 hours/week


Washing machine A+++

2500 to 3000W

48 weeks – 4 hours/week


Washing machine B

2500 to 3000W

48 weeks – 4 hours/week



750 to 1100W

48 weeks – 5 hours/week


Vacuum cleaner

650 to 800W

48 weeks – 2 hours/week


Ceiling fan


48 weeks – 5 hours/week


Hot water immersion heater

3000 W

48 Weeks – 3 hours/week


LED light bulb

7 W

48 Weeks – 6 hours/week


Bedroom And Washroom

how much solar power do electric appliances need

A bedroom is a quiet place of sanctuary to look forward to after a tiring day. It is usually an area of comfort within your home where you can relax and recharge your body and mind, ready for the next day. It is the place where you get ready for your daily work.

There are lots of electric appliances used in a bedroom and bathroom. Again, if you plan to run those appliances on the solar system, know their actual power consumption.

how much solar power do electric appliances need


Here is the annual power consumption table of home appliances in the bedroom and washroom.

Annual Power Consumption Table For Bedroom Room Appliances



Time Duration


Ceiling Fan

25 W

365 days – 9 hours/day

82.13 kWh

Desktop Computer

100 W

365 days – 1 hour/day

36.5 kWh

Electric Shaver

15 W

365 days – 1 hour/week

0.78 kWh

Hair Blow Dryer

1800 W

365 days – 30 min/day

328.5 kWh

Home Air Conditioner

1000 W

365 days – 5 hours/day

1825 kWh


150 W

365 days – 3 hours/day

164.25 kWh

Tablet Charger

5 W

365 days – 3 hours/day

1.09 kWh

Table Fan

10 W

365 days – 2 hours/day

7.3 kWh

How Many Solar Panels Do I Need For My House?

How many watts should the size of the solar panel system be? How much solar power do electric appliances need in the home? It is a common question.

Well, it depends upon your needs; it is guided by power consumption.

According to the US Energy Information Administration, an average American household uses 895kWh per month. Adding it up, the average power consumption is about 11,000kWh per year.

For that typical homeowner 28-34 solar panels will cover 100% of energy usage. The assumption here is that a solar panel can generate 250 watts. Note that electric output varies with the size of the solar panel, roof size, orientation and location.

How To Enhance The Productivity Of Your Solar System?

As we noted in earlier paragraphs, the amount of power consumption of each appliance is different. How many appliances can you run on your solar system? The answer is “it depends”. The solar array total power output must be more than total power consumption.

When you install a solar panel system at home, you might wish to make your house independent of your utility grid. Below are some tips to reduce the power consumption of our home while enhancing the productivity of your solar system.

Tips to reduce total power consumption:

  • When you run any electric appliances like refrigerators on your solar system, try not overloading the fridge with food. That way you keep its power consumption efficient and the food cold. A refrigerator’s load depends on how much food you keep in it, the age of your appliance and how long you leave it open
  • Make sure your solar panel is pointing directly at the sun at least once during each day. That ensures its radiations are directed onto your solar panel. It is a fact that a solar panel generates different amounts of electricity depending on its geographic location. Besides that it depends on where it is installed, how much attention is given to orientation and avoiding shading
  • Make sure the size of your solar panel is enough that it can fulfil your whole of home power needs. Not all solar panels are alike; they come in a range of wattages from 150 watts to 370 watts per panel. All else being equal, the output depends on its size and cell technology
  • When householders ask; 'how much solar power do electric appliances need' they often only think to reduce power use by using efficient lamps. Make sure you use energy-efficient electric appliances that are recommended for solar electric homes, like solar-efficient electric refrigerators, but still fit compact fluorescent lamp (CFL) bulbs where they can be used.

Future Scope Of Solar Power

We are fortunate that today’s market shelves are stocked with a countless number of energy-efficient electric appliances. These appliances come with a star rating that shows how much energy they will consume. Higher star numbers means the rating will be higher and it will consume less energy.

With the advancement in technology, electric appliances like refrigerators and air conditioners also come with a star rating. Star ratings help show people with solar generators how much solar power do electric appliances need. 

Furthermore, solar power generators don’t produce any harmful gases that can affect our environment. This fact and the increasing awareness of the low energy efficient electric appliances means the future of solar residential power is bright.

How much solar power do electrical appliances need? Householders can use this blog's information to guide them  and will know to save a significant amount of energy. Feel free to share this post with friends.


    • Barry Tonkin

      Thank you, Stephen,

      The power consumption sets the size of the solar generator you will need. I have written about some of the mobile and portable solar panels available for small electronic gadgets on the website. I’m adding to it so thanks for your feedback.


  1. This is the post that’s I am looking for. I was thinking to install solar panel in my home. So I am finding few tips and tricks. After long time just get your article and it was really so helpful for me.

  2. Sandra

    I found this helpful except for the obvious missing home heating or AC units were not listed at all. This is part of any household so I still am not sure how many panels I would need to replace my whole house system.

  3. Primrose

    I am exploring installing solar panel and I have no idea where to start. This is an helpful article for a novice. I will read it again.

    • Barry Tonkin

      Sorry for the delay.
      Solar panels provide an output in Watts which is Volts * Amps, (or changing the formula gives Volts = Watts / Amps, and Amps = Watts / Volts)
      There are for example polycrystalline, and monocrystalline 10 amp solar panels that produce within a range of wattage depending on the efficiency of the panel and sun radiance so lets say a 240w solar panel may provide 240 watts of load. That is equal to:
      10 amps at 24 volts, or
      40 amps at 6 volts
      20 amps at 12 volts

      A single 240 watt panel (for example) can provide 10 amps, but so can a smaller or larger one, depending on the power in the sunlight and the voltage being regulated. Not sure that helps much.


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