Solar & Battery Installation Johannesburg Local Installers & Quotes
Design solar and battery systems for Johannesburg using Photonik's professional design platform. Johannesburg sits on the Highveld with excellent sunshine and clear skies for much of the year. As South Africa's economic hub, Joburg has seen explosive growth in rooftop solar — driven by frequent load shedding, rising electricity costs, and the desire for energy independence.
Solar Design Johannesburg
Energy Usage
With electricity costs rising across Johannesburg, typical households using around 16 kWh daily stand to benefit significantly from switching to solar power. Most households in Johannesburg use around 16 kWh per day, whilst energy efficient homes can reduce this to roughly half.
Running dishwashers, EV chargers, and pool pumps during solar hours can make a big difference — shifting usage to match generation is one of the easiest ways to reduce your bills.
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
Based on 16 kWh daily usage, a 4.2kW system is a good starting point for Johannesburg — though many homeowners choose to install slightly more. Optimal sizing ranges from 6.3kW to 8.4kW to accommodate daily and seasonal generation variations.
While June is the weakest month for solar in Johannesburg, October more than makes up for it — and a battery can help bridge the gap between seasonal highs and lows.
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).
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Battery Storage Johannesburg
Solar Battery Sizing
Without battery storage, a 6.3 kW system in Johannesburg achieves approximately 50% energy self-sufficiency, with the remaining 50% supplied by the grid. A 10 kWh battery makes the most difference in winter when daylight hours are shorter — helping maintain closer to 99% self-sufficiency year-round rather than just in summer.
Local incentives and rebates can significantly improve battery economics — check what's available in Johannesburg and use the Photonik design tool to factor them into your calculations.
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
A 6.3 kW solar system at approximately R95,765 in Johannesburg can pay for itself through reduced electricity bills — often in under 6.3 years. Payback periods for solar-only installations average approximately 6.3 years, whilst battery storage extends payback but significantly improves energy independence.
Whether you choose solar-only at R95,765 or add a battery at R208,652, the investment is typically recovered well within the system's 25-year lifespan.