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Solar Calculator
Estimate a practical solar, inverter and battery starting point for your Cape Town property. Final sizing and pricing depends on roof space, DB condition, cable routes, supply type and load assessment.
Free estimateNo obligationTakes about 2 minutes
01
Your starting point
Tell us how the property uses power.
Estimated from your monthly electricity bill using a planning blended tariff of R3.80 per kWh.
Refine the estimateSupply, daytime use, roof and larger loads
Planning estimate only
Recommended System
Solar Starter
GJS must confirm the supply type at the DB or meter.
Roof type not yet confirmed.
Roof space must be confirmed before final panel sizing.
- Estimated monthly use
- 474 kWh
- Estimated daily use
- 15.8 kWh
- Recommended inverter
- 5 kW single phase
- Recommended battery
- 10.24 kWh
- Estimated panel quantity
- 6 x 620 W
- Estimated solar size
- 3.72 kWp
- Estimated daily solar
- 16.4 kWh
- Confidence rating
- Low
Estimated investment range incl VAT
R 80 000 to R 105 000Budget guide ex VAT: R 70 000 to R 90 000Estimated monthly savingR 945 to R 1 278
Estimated annual savingR 11 339 to R 15 341
Estimated CO2 reduction2.7 to 3.7 t/year
Estimated payback5 to 9 years
Typical Loads Covered
- Lights
- Wi-Fi
- Security systems
- TVs
- Computers
- Fridges and freezers
- Selected plug circuits
Additional Assessment Required
- Electric ovens
- Electric stoves
- EV charging
- Multiple air conditioners
- Underfloor heating
Why This System Was Suggested
Your electricity bill suggest a solar starter focused on backup power and daytime savings. The result balances energy use, peak load and available roof space.
What GJS Still Needs To Verify
- Supply type
- DB condition
- Essential load split
- Cable routes
- Roof space
- Roof type
- Shading
- Municipal requirements
- Battery location
- Planning estimate only. The result is a starting point, not a quote.
- GJS confirms final sizing and pricing after a site inspection and load assessment.
- The estimate uses typical Cape Town solar conditions and a planning blended tariff. Actual usage, generation and savings vary.
- Roof space, orientation, shading, DB condition, cable routes, supply type and municipal requirements can change the checked quote.
- Three-phase, EV charging, commercial and larger systems require a site-specific design.