Battery storage: Worth it under TNB’s Solar ATAP?

With the introduction of the Solar Accelerated Transition Action Programme (ATAP) policy by TNB, many homeowners are re-evaluating how to maximise their solar investment.

One key change is the offset structure, excess solar energy exported to the grid is now credited based only on the energy charge component, rather than the full tariff and additionally, it cannot be carried forward to the following months.

Currently, the offset rates are:

• RM0.27/kWh for monthly usage below 1,500 kWh
• RM0.37/kWh for usage above 1,500 kWh

This shift has sparked an important question: Is it still worth installing a battery storage system?

Understanding the impact of the new policy

Previously, homeowners could enjoy 1 to 1 offset value basis from exporting excess energy to the grid. With the revised structure, the compensation is lower, meaning:

• Exporting energy is less financially attractive
• Self-consumption becomes more important than ever

In simple terms, the more solar energy you use directly, the more you save.

So, should you install a battery energy storage system (BESS)?

A battery stores excess solar energy for later use, mostly at night, helping you reduce reliance on TNB’s grid. Instead of exporting at a lower rate, you use your own energy when needed.

When it makes sense?

Having a battery energy storage system is more worth it if you:

• Have high night-time usage (e.g. aircond, EV charging)
• Generate excess solar during the day
• Use more than 1,500 kWh monthly

Important limitation

The battery does not last overnight for most homes.

Typical residential batteries:

• Can only support a few hours of usage, not the whole night
• May still require grid supply after depletion

It helps reduce bills, but won’t fully replace the grid.

While batteries improve energy independence and efficiency, they come with:

• Higher upfront cost
• Longer payback period compared to solar panels alone

However, under the new Solar ATAP policy, the value of self-consumption increases, making batteries more relevant than before, especially for the right usage profile.

Solaroo’s take

Under the new policy:

Using your own solar energy is more valuable than exporting it. Battery can improve savings, but only with the right usage pattern.

Our final verdict

Worth it if:

• You have high usage and want better energy control

Not necessary if:

• Your daytime usage already matches your solar generation

Not sure? Let Solaroo help you find the best setup for your energy needs. Drop us a message via WhatsApp today!