Solar panels don’t produce energy all day at full power. We use Peak Sun Hours (PSH).
In Malaysia, average PSH ≈
3 to 4 hours/day
We’ll use :
Step 3: Calculate Required Solar System Size (kW)
Formula :
Solar System Size (kWp) = Daily Energy Usage (kWh)/Peak Sun Hours
Example :
System Size = 20/3.5 = 5.71 kW
So you need roughly a 5.71 kW solar system
Step 4: Convert System Size into Number of Panels
Now we calculate how many panels you need.
Generally, solar panels that we used are : 640W - 710W = 0.64 kW - per panel
Formula :
Number of Panels = Daily Energy Usage (kWh)/(Peak Sun Hours * Solar Panel Watt Rating (Watt)
Example :
Number of Panels = 20 kWh/(3.5 * 640W)
= 20 kWh/(2.24W)
= 8.9 unit solar panel
You would need approximately 9 solar panels
Ready to Find Out How Many Solar Panels You Need?
Every home and business uses electricity differently, which means the right solar system should be designed specifically for your energy usage, roof space, and long-term savings goals.
Instead of guessing, get a proper solar assessment and discover :
- How much you can save monthly
- The ideal system size for your property
- Estimated ROI and payback period
- Whether your roof is suitable for solar
Whether you're a homeowner looking to reduce electricity bills or a business planning to control operational costs, solar can be a smart long-term investment.
📞 Contact us today for a FREE solar consultation and system estimation.
Let’s help you turn sunlight into savings.
Malaysia