“How many kWp do I need?”
That’s the #1 question we hear from homeowners ready to install solar — and for good reason.
Choosing the right solar system size is critical. Too small, and you won’t save enough. Too big, and you’ll overpay upfront. This guide will help you estimate the ideal size for your home in Malaysia.
⚡ Step 1: Check Your Average TNB Bill
The higher your monthly bill, the bigger your potential savings — and the larger system you may need.
| TNB Bill (Monthly) | Suggested System Size |
|---|---|
| RM250–RM350 | 3.5kWp – 4.2kWp |
| RM400–RM600 | 5.0kWp – 6.5kWp |
| RM700+ | 7.0kWp – 10kWp |
✅ These are general ranges. A proper site inspection is still needed to confirm feasibility and performance.
🧱 Step 2: Assess Your Roof Space & Sunlight
Solar panels require:
- Clear, unshaded roof space (minimum 250–350 sqft for a 5–6kWp system)
- Good east-west or south-facing orientation
- Strong daily sun exposure (especially 10am–4pm)
✅ Homes in Penang, KL, Johor & Selangor typically have excellent solar exposure.
🔋 Step 3: Consider Your Daytime Usage Pattern
Solar works best when you use electricity during the day. So ask yourself:
- Is someone home during working hours?
- Do you run air-cond, water heaters, or appliances in the daytime?
- Do you plan to install EV chargers?
✅ Higher daytime usage = faster ROI.
✅ Not Sure Where to Start?
Send us your latest TNB bill and a photo of your roof.
We’ll help you choose the right system size — no guesswork, no pressure.
📍 Serving solar-ready homes across Malaysia.