Topcon Vs Bifacial Solar Panel | Best Solar Panels 2026 | Solar Panels For Home
WAAREE II 615 Watt N-Type TOPcon : https://amzn.to/4rXawsD
WAAREE Solar Panel 535 Watt : https://amzn.to/4l63rDi
Whenever a new technology enters the market, the older one is quickly sidelined. The biggest reason behind this is marketing. A new panel is promoted in such a way that it feels like there is nothing better available — and because of that, it is often sold at a higher price.
Right now, TOPCon panels are more expensive, while Mono PERC Bifacial panels (the previous generation technology) are available at a comparatively lower price.
But the real question is — how much actual difference is there between them?
📊 Technology Evolution (Efficiency Comparison)
● Polycrystalline: Around 16–17% efficiency
● Mono Crystalline: Around 18–20% efficiency
● Mono PERC Half-Cut Bifacial: Around 21–22% efficiency
● TOPCon: Around 23–24% efficiency
👉 The efficiency gap between Mono PERC and TOPCon is only about 2%.
However, when it comes to pricing:
● The price gap can be around 5–10%
● Mono PERC Bifacial panels may cost around ₹1,00,000
● TOPCon panels of the same capacity may cost ₹1,10,000–₹1,15,000
So the extra amount you are paying is mainly for the newer technology branding.
🧪 Lab Efficiency vs Real-World Performance
Whether it is TOPCon or Mono PERC, the efficiency mentioned on the panel is lab-tested efficiency.
In real conditions, performance depends on many factors:
● Sunlight intensity
● Shadow on panels
● Dust accumulation
● Temperature conditions
Because of these factors, actual efficiency in real installations is always lower than lab ratings — and this applies to both technologies.
💰 Which One Generates More Power in the Same Budget?
Suppose:
● ₹1,00,000 gets you 10kW of TOPCon panels
● The same ₹1,00,000 gets you 11kW of Mono PERC panels
In this case, the 11kW Mono PERC system will obviously generate more electricity.
📈 Practical Example Comparison
Let’s consider a 10kW system example:
● 16 panels of 615W each → Approx. 9.8kW system → ₹2,00,000
● 545W panels → Approx. 12kW system → ₹1,97,000
Yes, the structure cost may increase slightly due to more panels, but let’s look at generation:
● 12kW system → Around 19,700 units per year
● 9.8kW system → Around 16,200 units per year
👉 Around 3,500 units difference per year
👉 Around 35,000 units difference in 10 years
Even if we reduce this gap considering degradation and assume only 25,000 extra units in 10 years:
At ₹10 per unit average, that equals approximately ₹2.5 lakh worth of additional electricity.
🏠 Which One Should You Choose?
✅ Choose Mono PERC Bifacial If:
● Your budget is limited
● You have sufficient rooftop space
● You want to install higher total kW in the same budget
✅ Choose TOPCon If:
● Rooftop space is limited
● You want higher efficiency per panel
● You prefer the latest technology
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