Try our solar calculator

TRY OUR
SOLAR CALCULATOR

Want to find out how affordable solar is?

Simply enter your address and monthly electricity spend and we will tell you instantly how much you can save.

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Why use Which Solar?

WhichSolar provides independent solar power advice, whilst helping you understand the cost benefits and implications of installing a solar system that suits your needs. Our aim is to simplify your decision to switch to solar and save!

Discover

Understand the benefits of solar power

Compare

Request quotes from certified solar installers

Switch

Simplify the decision to switch to solar

Save

See how much you can save on your energy bills

About us

To many people solar energy seems like a really good idea, but unfortunately, that is where it ends. It is a complicated industry with a great deal of technical jargon that is difficult to get your head around.

WhichSolar aims to simplify your decision to switch to solar and save.

We have taken into account all the variables (like sunlight levels in your area, number of panels required, roof orientation, cost of electricity) and made one easy-to-use calculator.

Simply enter your address and monthly electricity spend and our state-of-the-art algorithm will let you know the cost of a suitable solar power system, along with the monthly saving on your current electricity bill and the net saving after 25 years, (the period where your system is most efficient).

That's not all, WhichSolar then provides you with a list of reputable, hand picked suppliers to review. Simply select up to 3 suppliers and we will get them to provide you with a detailed quotation within 48 hours.

Looking to find out more information about solar energy? Check out the WhichSolar blog! Here we have articles that have been written with the customer in mind. No complicated jargon, just easy to understand information.

How the calculator works

Understand the cost of installing a solar power system that suits your needs, see how much you could save on your monthly electricity bills and see your net savings over 25 years.

Step 1

Enter home address and average monthly electricity spend

Step 2

Compare savings against the cost of an average solar power system

Step 3

Review and compare a list of reputable installers

Step 4

Request detailed quotes from up to 3 installers

I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that.

Thomas Edison, 1931

Latest Blog stories

Discover everything you need to know about solar power.

Browse through the articles below, which are written with you in mind.

No complicated jargon, just solar simplified.

  • 24Apr

    Comparing German Solar Power with South Africa

    Germany, a country not well known for massive amounts of sunshine, even in summer, is a country South Africa can look up to when it comes to Solar Power. The Germans, like a few other European count
  • 22Mar

    Waking Up to Solar Power in South Africa

    In the last few years South Africa has been plagued by Loadshedding nationally and in some provinces frequent power cuts thanks to an ailing infrastructure.


  • 19Oct

    The Benefits of Solar Energy

    The Earth receives approximately 1370 watts per square metre of solar radiation each year. That’s a lot of power! 
24Apr

Comparing German Solar Power with South Africa

South Africa can look up to Germany when it comes to Solar Power. Here's why.


22Mar

Waking Up to Solar Power in South Africa

In the last few years South Africa has been plagued by Loadshedding nationally and in some provinces frequent power cuts thanks to an ailing infrastructure.


19Oct

The Benefits of Solar Energy

The Earth receives approximately 1370 watts per square metre of solar radiation each year. That’s a lot of power.