1. DIY SOLAR HOME SYSTEM

1.5. MODULE 5

Module 5:

 Solar Economics & Sustainability

1. Payback Period

What? Time needed to recover your solar investment through savings.

Formula:

 
Total System Cost ÷ Annual Savings = Payback Period (Years)

Example:

  • System cost: 19,500

  • Saves 2,400/year on electricity bills

  • Payback = 

    19,500÷2,400 = 8 years

📌 Note: Shorter payback = Better investment!

2. Environmental Impact

✅ Benefits:

  • Zero pollution (No CO₂ emissions).

  • Reduces fossil fuel use (Coal, diesel generators).

  • Sustainable (Sunlight is unlimited!).

📌 Fun Fact:
A 5kW solar system cuts ~5 tons of CO₂ yearly = Planting 100 trees!

 

Takeaway

✔ Solar pays back in 3-7 years (then FREE power!).
✔ 1 solar home = 1 less diesel generator polluting the air!