FlexPay
Pay a deposit from 20% and spread the rest monthly. Tell us you are interested and we follow up. Eligibility and terms are confirmed when you apply.
Dumelang solar calculator
Your solar journey, connected.
Dumelang turns your appliances and your day into a first solar estimate, and shows when a professional site assessment makes sense. You get an initial estimate before you need to register.
Size it around your day
- Solar
- Battery
- Grid
- Site load
Solar
Site
Battery
Grid
Illustration only. Real systems are designed around each site.
Illustration only. How a real system behaves depends on its design.
Start here
Calculate your solar needs.
Pick your goal, add your appliances and get an initial estimate in a few minutes.
Loading the instant quote tool… If it doesn't appear, call us on +267 310 1006 or WhatsApp us for a quote.
How it works
Seven steps to your estimate.
Your goal
Reduce costs, back up outages, use less grid power, go off-grid, power a business, or power a pump or cold room.
Your property
Home or business, location, grid availability and phase, any existing solar, and roof or ground preference.
Appliances and equipment
Search or pick from a visual list, set quantities, and add your own equipment.
Your usage
Operating hours, day and night use, what must stay on, and how long backup should last.
System preferences
Grid-tied, hybrid or off-grid, with or without a battery, and room to expand.
Your estimate
An indicative inverter, solar and battery size, what it can support, key assumptions and how confident the result is.
Next steps
Save your estimate, request a detailed quotation, book a site assessment, or explore FlexPay.
Why it is accurate
It does not just add up watts.
Three different numbers decide what a system must do. Dumelang considers each on its own.
- Peak running load. What the system must deliver when appliances run together.
- Starting surge. Motors, pumps and compressors draw far more for a moment when they start, and the inverter must cope.
- Daily energy. How much energy you use across the day and night decides the size of the solar array and the battery.
Honest results
Every estimate says how sure it is.
An automated estimate is never a final engineering design. Final designs are reviewed by appropriately qualified technical personnel and must comply with applicable standards.
Preliminary estimateA first indication from the information you provided.
Additional information requiredA few details are missing before the result can be trusted.
Technically validatedReviewed by qualified Solarpro technical personnel.
Site assessment
Turn an estimate into a design.
A site assessment is a professional technical service, not a hurdle. It gives you the detail an estimate cannot.
- Professional energy assessment
- Technical site evaluation
- Detailed technical design
- Energy assessment report
- Commercial quotation
Optional extras
Finance it. Support it.
AssurePlus
Solarpro's post-installation support programme for qualifying customers: preventative health checks, Fix & Supply support and warranty coordination.
Questions
Good questions, straight answers.
Do I have to register to use Dumelang?
No. You receive an initial estimate before registering. We email you when you want to save your results, request a detailed quotation or book an assessment.
Is the estimate a final design?
No. It is an indicative configuration with stated assumptions and a confidence level. Final designs are reviewed by qualified technical personnel and must comply with applicable standards.
Can I use it for a borehole pump or a cold room?
Yes. Choose that as your goal. The calculator accounts for starting surge, and we will usually recommend a pump and starting-load assessment or a commercial energy audit.
Can I use it for a business?
Yes. Choose a business or commercial operation. Larger and more complex sites usually need a site assessment.
Will FlexPay approve me?
The calculator only records your interest. Eligibility and terms are confirmed by Solarpro when you apply. Read about FlexPay.
Will I be able to save and compare quotations?
Customer accounts, where you can save estimates and manage quotations, follow the launch of the calculator.
Are you an installer or contractor?
Join the Solarpro Contractor Network: buy approved packages and products, and keep your own customers.