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Find your perfect solar fit in minutes

Use our free calculator to size your system, estimate costs, and explore finance options, no guesswork, no surprises.

Build My Energy Assessment Talk to a Solar Specialist
  • Use the calculators, which means you know your size, cost and finance options before you talk to anyone.

Our free solar calculators

System Sizer

Answer a few questions about your electricity use and get a starting system size for your property.

Open the System Sizer

Solar ROI assessment

See what solar could save your home or business, and how many years it takes to pay for itself.

Open the ROI assessment

Finance estimate

Enter your system cost and see the VAT and the total amount you would finance.

Open the finance estimate

Solar design calculations

See what a proper system design takes into account, from your roof and DB board to a year of usage.

Open design calculations

Wheeling savings estimator

Enter your electricity bill and a wheeling offer, and see the saving on your whole bill, fixed charges included.

Open the wheeling estimator

Buying power from a solar plant somewhere else? That is called wheeling. Try the wheeling savings estimator.

New to wheeling? Read how solar wheeling works.

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Confused by system sizes, costs & financing?

You’re not alone, calculations feel complex, quotes vary wildly, and finance terms read like a foreign language.

  • Up-front cost estimates range from R50 000 to R5 million, where do you even start?
  • Picking the right kW size feels like guesswork: too small means shortfalls; too big means wasted cash.
  • Loan rates, rentals, and PPAs all look different, making it hard to know which saves you most.

We believe every South African deserves clear solar answers!

Services

Energy audit & design

Energy Audit, Custom commercial solar systems design, engineered for performance and long-term ROI.

Finance and permits

Application to major funders for best rates and best solution: PPA, Rent to own or Lease. We also handle municipal SSEG applications.

Installation and maintenance

Installed by our team and preferred, vetted installers approved by the brands. Ongoing repairs & maintenance.

ZenSolar sizes, finances and installs systems for homes and businesses. We can do the same for you.

The Power Path™ guide

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1

Input your details

Choose home or business, then share your monthly power spend.

Three professionals reviewing solar project details on a large monitor displaying an on-site solar panel installation, representing a technical design meeting.

2

Compare your costs

Our calculator shows you side-by-side finance and savings.

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3

Agree your deal

Submit your info and our team calls to finalise your plan.

Testimonial

ZenSolar was excellent in all that they did. The installation at my Printing Shop and home was done to the highest standard.

"A smiling man with a bald head and a white goatee beard, wearing a green and blue patterned polo shirt, in a circular profile picture."

Rated 5 out of 5

Bernard Synman

Director of EFJS printing

ZenSolar did an amazing job for us at Hoërskool Dinamika. The work was done promptly and very neat. We are very happy.

"A middle-aged man with short grey hair and a serious expression, wearing a blue and white plaid collared shirt, is shown in a headshot."

Rated 5 out of 5

Jaco Pretorius

Vice Principal, Dinamika Hoërskool

The perfect solution for not being troubled by outages anymore. I had a tailor made solution for my Business…..

"A smiling woman with long brown hair and bangs, and green eyes, is shown in a circular profile picture with an orange star icon in the bottom right corner."

Rated 5 out of 5

Cyrielle Malaval

Owner of Stone Castle

Features

No money down, for businesses

With flexible finance options, you can eliminate capital costs and swap your utility bill for a solar rate agreed up front, which means you can start saving without breaking your cash flow.

Protect your business cashflow

With a rate agreed up front that rises each year by an amount set in your agreement, you can plan around Eskom's unpredictable hikes and future-proof your bottom line.

Stress free system
performance

With long term maintenance and support included, we keep your system running at its best which means you get reliable savings without surprise breakdowns or extra call out fees.

No surprise costs for 10 years

Your system is backed by ZenSolar's own 10-year swap-out warranty.

Get it done right the first time

With registered and certified installers, every system meets national standards which means no compliance headaches, no rework, and no broken promises.

See your system in the app

With app monitoring you see your solar production and consumption in real time, which means you stay in control of your own supply.

Know when something needs attention

With pop-up notifications in the app, you hear about it when something needs attention, which means you can act early and keep your savings on track.

Avoid legal risks, top workmanship

With SANS-compliant installations, we go beyond minimum standards which means long-term quality that keeps you safe, saves you money, and protects your investment.

To get all this and more…

Build My Energy Assessment Talk to a Solar Specialist

Finance available through South Africa’s leading banks

"Merchant West logo featuring a circular icon with 'MW' and text 'MERCHANT WEST' with an underline." "FNB logo featuring a black silhouette of a tree against an orange sun and teal horizon, next to 'FNB' in teal text." "Absa logo with the word 'absa' in lowercase red text enclosed within a red dashed oval." "Standard Bank logo, a blue and silver shield with a stylized flag or 'S' inside."

Quick facts before you calculate.

"Digital visualization of solar panels overlayed with complex data graphs, vibrant energy burst, and performance analytics under a bright sky."

Staying with Eskom’s pay-as-you-go model is already a lifetime contract with no fixed price, no end in sight, and yearly increases.

  • 20 % of homes pick systems 30 % larger than needed, wasting cash.
  • Rent-to-own can break even in 12 to 18 months versus 7 to 10 years on cash.
  • Save up to 92% on your power bill.

How are we different?

With us

  • 10-year swap-out warranty
  • Full energy audit + ROI report
  • Rates agreed up front, real cost breakdown

With them

  • Limited or no support
  • Generic estimate
  • Hopes and guesses