How to Choose the Right Solar System Size in Pakistan
Updated 2026 · 6 min read
Picking the right solar system size is the single biggest factor in how much you save. Go too small and you still pay heavy bills. Go too big and you overspend without proportional return.
Step 1: Know Your Monthly Bill
Look at your last 3-month average bill in units (kWh). Pakistani homes typically use 300–1500 kWh/month.
Step 2: Match Bill to System Size
- 300–500 units → 3kW system
- 500–800 units → 5kW system
- 800–1200 units → 7.5kW system
- 1200+ units → 10kW+ system
Step 3: Use Our Calculator
Use the Solar Load Calculator for an exact recommendation based on your appliances.
Step 4: Plan for Net Metering
If your roof can hold 25% more panels, install them — net metering credits the extra units.
Common Mistakes
- Ignoring future appliance additions (ACs, EVs).
- Choosing low-quality inverter to save cost — replace cycle is 3 years vs 10.
- Skipping load profiling.