How much of your TNB bill can solar cut?

Your bill has five parts and solar only reduces some of them. Here is what each unit of solar is really worth, and five ways to save more.

Since 1 July 2025, a home electricity bill in Peninsular Malaysia is made up of separate charges. Understanding them explains why two homes with the same solar system can see very different savings.

What you pay for each unit from the grid

On top of that there is a RM10 monthly retail charge, normally waived for homes using 600 kWh or less, and the Automatic Fuel Adjustment (AFA), which changes monthly with fuel prices.

What a unit of solar is worth

• Solar you use directly avoids the energy, capacity and network charges together: about 44 to 54 sen for every unit.
• Solar you export under Solar ATAP earns a credit at the energy charge only: about 27 to 37 sen for every unit.

So how much can you cut?

It depends on how much power you use while the sun is up. A home that is occupied in the daytime, or runs air conditioning, water heaters or a home office during the day, uses more of its own solar and saves more. A home that is empty until evening exports more and saves less. This is why we size a system from your actual bills and daily routine instead of quoting a standard percentage.

Five ways to save more

1. Shift flexible loads to daytime. Run the washing machine, dishwasher, water heater and pool pump between 10am and 4pm.
2. Charge your EV in the day when you can.
3. Size for your usage. A bigger system is not better if the extra credits expire unused.
4. Consider a battery if most of your usage is at night.
5. Keep panels clean and check your monitoring app so a fault does not go unnoticed for months.