Do Solar Panels Work During Load Shedding? What Every Gauteng Business Needs to Know

Do Solar Panels Work During Load Shedding? What Every Gauteng Business Needs to Know

If you’re running a business in Gauteng, you already know how damaging load shedding can be. From halted production lines to lost revenue and frustrated customers, unreliable power isn’t just inconvenient — it’s costly.

That’s why more businesses are investing in solar. But here’s the truth:

☀️ Solar Panels Alone Do NOT Work During Load Shedding

Solar panels generate electricity when the sun is shining — but most standard systems are grid-tied. This means:

-They shut down when the grid goes down
-They do NOT provide backup power on their own
-They are designed for savings, not independence

This is a safety feature to protect technicians working on power lines.

🔋 What You Actually Need: A Battery-Integrated System

To keep your business running during load shedding, your solar system must include:

-Battery storage (to store excess energy)
-A hybrid or off-grid inverter
-A properly engineered system design

With this setup, your system can:

-Power your business during outages
-Store energy during the day for night use
-Reduce reliance on Eskom significantly

🌙 What Happens at Night?

At night, solar panels stop producing power. This is where batteries become essential.

-Without batteries → no power at night
-With batteries → stored solar energy keeps your operations running

For businesses operating beyond daylight hours, battery sizing is critical.

⚡ Can Solar Fully Replace Eskom?

For many businesses, the goal isn’t just backup — it’s energy independence.

Depending on your system size and energy usage, solar can:

-Significantly reduce your electricity bill
-Provide backup during outages
-Support critical loads (offices, refrigeration, machinery)

However, full independence requires a larger system with sufficient battery capacity.

🏢 Why System Design Matters for Businesses

Not all solar systems are created equal — especially for commercial use.

At Self Sustainable Solutions, systems are engineered specifically for:

-Warehouses and factories
-Office parks and retail centres
-Large residential estates

This ensures:

-Correct system sizing
-Optimised ROI
-Long-term reliability

A poorly designed system can leave you exposed during outages — defeating the purpose of going solar.

📈 Solar vs Generator: A Smarter Long-Term Solution

Many businesses rely on generators during load shedding, but they come with downsides:

-Fuel costs keep rising
-Noise and maintenance issues
-Not environmentally friendly

Solar with battery storage offers:

-Lower long-term costs
-Clean, silent operation
-Reliable backup power

✅ Final Thoughts

So, do solar panels work during load shedding?

👉 Yes — but only if your system is designed correctly.

If you want true business continuity, you need more than just panels. You need a fully integrated solar solution built for performance, reliability, and long-term savings.

Cut Costs. Control Power.

Stay Operational.
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☀️ Free Solar Tools

Solar Calculator Suite

Calculate your monthly electricity savings, annual ROI, and total returns over 25 years — based on your actual Eskom bill and system investment.

Determine the right solar system size for your warehouse, factory, office park, or home — engineered for your Gauteng energy demands.

Discover the true cost of load shedding on your business — and what you could save by switching to commercial solar.

See exactly when your solar investment pays for itself — and how much profit it generates over a 25-year lifespan.

Get a realistic cost estimate for a commercial or residential solar installation in Gauteng — based on your system size, roof type, and battery requirements.

R
Your average monthly Eskom or City Power bill
R/kWh
Average Johannesburg City Power commercial rate ≈ R3.20/kWh
R
Full installed cost including panels, inverter, installation & commissioning
50%75%100%
Percentage of your electricity bill offset by solar generation
%
Eskom average annual increase ≈ 10%. Higher escalation = faster payback
Monthly Electricity Savings
R12,750
≈ 3,984 kWh saved per month
📊 Savings Projection R—
Annual Savings (Year 1) R153,000
5-Year Cumulative Savings R—
10-Year Cumulative Savings R—
25-Year Total ROI —%
CO₂ Offset / Year — tons
☀️ Note: Calculations use Gauteng peak sun hours (5.5 hrs/day), 80% system performance ratio, and your selected Eskom tariff escalation. Contact Self Sustainable Solutions for a precise site-specific assessment.
Ready to lock in these savings? Get a no-obligation commercial solar quote.
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kWh
From your Eskom / City Power bill. Don't know? Enter your bill amount below instead.
R
If entered, this will override the kWh field above (uses R3.20/kWh to convert)
Battery backup adds cost but ensures power during load shedding
Recommended System Size
76 kW
Large Commercial System (50–100kW)
🔧 System Specification R—
Approximate Panel Count — panels
Daily Energy Generation — kWh/day
Monthly Energy Generation — kWh/month
Annual Energy Generation — kWh/year
Roof Space Required — m²
📏 Based on: Gauteng peak sun hours (5.5 hrs/day), 80% system performance ratio, 400W panels at 2.5m² each. Roof space uses 1.5× panel area for mounting clearance. Final sizing requires a site assessment.
Get an accurate system design and engineering quote tailored to your property.
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Select the stage your business experiences most frequently
hrs/day
Stage 4 ≈ 8 hrs/day | Stage 6 ≈ 12 hrs/day
R
Average daily revenue/turnover or value of production output
Operations that fully stop during outages have higher impact (1.0)
R
Current Gauteng diesel price ≈ R22.50/litre
Monthly Revenue Lost to Load Shedding
R—
— hours lost per month
⚡ Load Shedding Cost Breakdown R—/yr
Hours Lost Per Month —
Revenue Impact (Monthly) R—
Generator Fuel Cost (Monthly) R—
Total Annual Loss R—
5-Year Cumulative Loss R—
Business Disruption Level High
☀️ Solar Would Save You R—
Annual Load Shedding Cost Eliminated R—
Generator Costs Eliminated R—
⚡ Reality check: This is the ongoing cost of doing nothing. A commercial solar + battery system from Self Sustainable Solutions eliminates this loss permanently — and saves on your Eskom bill too.
Stop paying the load shedding tax. Get a commercial solar solution quote today.
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R
Full installed cost — panels, inverter, racking, cabling, installation & commissioning
R
Use your ROI Calculator result above, or enter your estimated monthly electricity saving
%
Eskom historical average ≈ 10% per year. Higher = faster payback
%
Industry standard solar panel degradation ≈ 0.5% per year
Payback Period
— years
With 10% annual Eskom escalation
📈 Investment Summary R—
Simple Payback (no escalation) — yrs
Payback With Tariff Escalation — yrs
Profit After Payback (25yr total) R—
25-Year Total Savings Generated R—
📈 Long-term view: Once your system pays for itself, every rand saved is pure profit — for the remaining system life. Quality commercial solar systems from Self Sustainable Solutions are engineered for 25+ year performance.
Let our engineers build a precise ROI model for your specific commercial solar project.
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R
Your average Eskom or City Power monthly bill
Flat and carport/ground-mount installations carry higher racking costs
Estimated Installation Cost
R—
— kW system
🏷️ Cost Breakdown R—/kW
Solar Panels R—
Inverter R—
Racking & Mounting R—
Cabling & Electrical R—
Installation & Commissioning R—
💡 What This Buys You
Approx. Panel Count —
Monthly Generation (est.) —
Estimated Monthly Savings R—
Estimated Payback Period — years
📋 Indicative pricing only. Actual costs depend on site complexity, roof access, equipment specifications, and engineering scope. Self Sustainable Solutions provides detailed quotes after a proper site and energy assessment — at no cost to you.
Get an accurate, itemised quote from our commercial solar engineers in Gauteng.
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Find Your Solar System

Answer 4 quick questions and discover the ideal solar solution for your property

1
Property
2
Need
3
Scale
4
Type
Question 1 of 4

What type of property is this for?

Help us find the right system for your situation

Home / Residence
Residential property or cluster home
Office / Retail
Office park, retail centre or commercial building
Warehouse / Factory
Industrial facility, manufacturing plant or logistics
Smallholding / Farm
Agricultural property, estate or large residential stand
Question 2 of 4

What is your primary energy need?

Select the solution that best matches your goal

Solar Power System
Reduce electricity bill & protect against load shedding
Solar Geyser
Reduce hot water electricity costs with solar heating
Water Supply (Borehole)
Solar-powered borehole pump for independent water supply
Panel Cleaning & Maintenance
Keep your existing solar system performing at its best
Question 3 of 4

How large is your system requirement?

We have engineered solutions at every scale

5kW
Small
5kW–8kW · Standard home · Up to 500 kWh/month
10kW
Medium
10kW–20kW · Larger home or small office · 500–1,000 kWh
30kW
Large
30kW–50kW · Commercial / warehouse · 1,000–3,000 kWh
Very Large / Industrial
75kW–100kW · Factory / industrial operations · 3,000+ kWh
Question 4 of 4

Which system type suits you best?

These options are available based on your selections

Finding available options...

Your Recommended Systems

Based on your requirements, here are the best-matched solutions from Self Sustainable Solutions

Finding your matched systems...

Frequently Asked Questions

Do solar panels work during load shedding?
Yes, but only if your system includes battery storage and a hybrid or off-grid inverter
Can solar panels work without a battery?
No, grid-tied systems shut down during load shedding unless batteries are installed
How do solar panels work at night?
They don’t produce power at night, so stored energy from batteries is used instead
Is solar cheaper than Eskom for businesses?
In most cases yes, especially over the long term due to rising tariffs
Can solar power a warehouse or factory?
Yes, with the correct system size and battery capacity, solar can support commercial operations
What size solar system does my business need?
It depends on your energy usage, but commercial systems typically range from 30kW to 100kW+
Are solar batteries worth it for businesses?
Yes, they are essential for backup power and maximising energy independence during outages