How solar changes your electricity bill
Solar does not replace the grid or automatically erase a bill. It changes how much electricity you import, how much solar production you use directly and how exported surplus is treated within the billing period.
Think in three electricity flows
During daylight hours, solar generation first serves electricity being used at the premise. Any shortfall is imported from the grid; any surplus may be exported under the applicable programme arrangement.
- Direct self-consumption: solar used immediately at the premise.
- Grid import: electricity drawn when demand exceeds solar generation.
- Grid export: surplus sent out and considered under Solar ATAP settlement rules.
Domestic exports are not valued at Average SMP
The current Solar ATAP guideline bases domestic exported-energy credit on the applicable Energy Charge. The non-domestic method is different and uses Average System Marginal Price. These two models should not be mixed.
Credits have limits
The guideline states that export credit is applied within the same billing period, cannot be carried forward and cannot offset the Automatic Fuel Adjustment. Unused export value at the end of the billing period is therefore not equivalent to stored cash value.
What a proposal should disclose
Ask the installer to show annual generation, assumed self-consumption, assumed export, the tariff inputs used, system losses and whether any future tariff change has been assumed. A single “percentage bill reduction” is not enough to audit the estimate.
Official sources
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This page covers Peninsular Malaysia only. It is educational guidance, not an installation proposal, engineering assessment or financial guarantee.