Solar & Battery Installation Johannesburg Local Installers & Quotes
ℹ️ Get quick estimates for solar and battery sizing, costs, and savings in Johannesburg using these simplified calculators. For more accurate, advanced calculations, use the full Photonik design platform.
Solar Design Johannesburg
Energy Usage
Your daily energy consumption determines the optimal solar system size for your home in Johannesburg. The average household uses around 15 kWh per day, whilst energy efficient properties may use only half that.
Lowering energy usage before solar installation—via improved insulation and efficient appliances—often reduces required system size and enhances financial returns.
Typical energy usage per person per day in Johannesburg:
Note: Actual usage varies depending on property size, building efficiency, climate, and appliances.
Solar System Sizing
You'll need around 3.9kW of solar to match your average consumption. Optimal sizing ranges from 5.9kW to 7.9kW to accommodate daily and seasonal generation variations.
Expect around 29.3 kWh daily from a 6.6 kW system in Johannesburg, with production varying from 3.78 kWh/kW/day in June to 4.87 kWh/kW/day in October.
Solar & Energy Savings
Calculate Heat Pump & EV Savings
Electrify your home by replacing gas heating, petrol vehicles, and other fossil fuel appliances with electric alternatives powered by clean solar energy. This delivers significant additional financial savings and substantial carbon emission reductions. Our calculator helps you compare costs and model the financial impact of switching to electric appliances and vehicles.
How Solar Reduces Your Electricity Bills
The calculations below show how your electricity bills change with solar. Your Old Bill of - per month (- annually) is calculated from your total energy consumption multiplied by the grid electricity rate. Your New Bill of - per month (- annually) accounts for solar generation, the percentage you use directly (self-consumption), remaining grid consumption, and feed-in credits for excess energy exported to the grid. This results in monthly savings of - (- annually).
Battery Storage Johannesburg
Solar Battery Sizing
With solar-only (no battery), a 6.6 kW system provides approximately 50% self-usage in Johannesburg, depending on your consumption patterns, drawing 50% from the grid. Installing a 10 kWh battery boosts your energy independence to around 99% per year, cutting grid dependency down to 1%.
To get precise battery savings and payback figures, use the complete Photonik design platform.
Energy Self Sufficiency Calculator*
*Note: This calculator provides simplified battery self-sufficiency estimates. For accurate per-hour simulations that account for solar generation patterns, consumption timing, battery charging/discharging cycles, and efficiency losses across all seasons, use the full Photonik design tool.
Panel Placement Tool Johannesburg
This is a simple panel placement tool that lets you quickly estimate panel count for a single roof area. Try Photonik for advanced features:
- Multiple panel groups
- Custom roof angles
- Panel orientation
- Shade loss calculations
- Panel selection (1000+ models)
- Full integration with our design tool
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Solar & Battery System Cost Johannesburg
Understanding Solar & Battery System Costs
Expect to invest approximately R106,088 for a 6.6 kW solar system in Johannesburg, or around R213,957 with a 10 kWh battery included. Solar systems typically achieve payback in around 5.8 years, whilst adding battery storage extends the payback period but provides greater energy independence.
Cost estimates cover equipment, installation labour, and applicable taxes. Modify the system size and battery storage sliders to explore different investment levels and payback periods.