Solar ATAP vs SELCO for Factories in Malaysia
Guidelines reviewed: 14 October 2026. This guide covers new industrial rooftop projects in Peninsular Malaysia. Sabah and Sarawak require separate checks.
Solar ATAP permits eligible surplus solar electricity to earn bill credits; grid-connected SELCO requires electricity to stay within the premises. For a factory, the choice should follow its daytime demand, shutdown schedule, proposed capacity and connection requirements. A large roof or a high monthly bill alone does not establish which route gives the better outcome.
Solar ATAP vs SELCO: the main differences
| Decision | Solar ATAP | Grid-connected SELCO |
|---|---|---|
| Surplus generation | Eligible exports receive bill credits. | Grid export is prohibited; design must prevent it. |
| Non-domestic capacity | Up to 100% of the applicable maximum demand, capped at 1,000 kWac and subject to network assessment. | No programme capacity ceiling for non-domestic consumers, subject to technical and regulatory requirements. |
| What to model | On-site use, eligible exports and remaining grid imports. | On-site use, output curtailed to prevent export and any proposed storage. |
| Main factory question | Will export credits justify the proposed size? | Can the facility use the proposed output during low-load periods? |
The programme rules come from SEDA’s Solar ATAP information and the Energy Commission’s June 2026 SELCO guidelines, sections 3.4–3.6. The modelling questions are planning considerations, rather than eligibility rules.
How do Solar ATAP export credits work for factories?
Non-domestic exports are valued at Average System Marginal Price (Average SMP), rather than the domestic energy-charge rate. Settlement is limited by imported energy and the Maximum Allowable Quantity; unused eligible exports do not carry into later billing periods. A negative net bill is adjusted to zero without a cash payout. Credits cannot offset the Automatic Fuel Adjustment (AFA).
For sizing, maximum demand uses the average of the preceding twelve months’ recorded values, or declared demand where fewer months are available. These details are in the Solar ATAP guidelines, sections 3.6, 8 and 14.
Ask for a proposal that shows self-consumed electricity and exported electricity separately. Applying one savings rate to all generation can hide the effect of weekends, holidays and reduced production. Request sensitivity checks for changes in export value and factory demand.
SEDA’s general guidance describes a ten-year ATAP contract, followed by operation strictly for self-consumption. A financial model extending beyond that term should show the change in operating assumptions.
What should a factory check under SELCO?
The June 2026 guidelines, sections 3.6 and 5.7 require at least one hour of battery energy storage for non-domestic systems exceeding 1 MWac, subject to their transitional provisions. Connection assessment is required above 72 kWac.
Check charges in writing near 1 MWac. Section 12.2 says charges apply at 1 MWac and above; the 31 December 2025 notice describes the standby-charge threshold as exceeding 1 MWac. Confirm the applicable threshold and charge basis with ST and the utility before approving the budget.
For the engineering review, ask how the proposed system will respond when machinery stops or a production line trips. The proposal should explain control behaviour, anticipated curtailment and the responsibilities for testing and ongoing checks.
How do shifts and weekend shutdowns affect the choice?
The following are illustrative operating patterns, not programme recommendations:
- Day-shift factory: Compare the solar generation curve against production hours, lunch breaks and the lowest daytime demand.
- Factory closed on weekends: Model non-production days separately. A weekday consumption average can conceal periods with little demand.
- Continuous-process plant: Check daytime minimum demand and planned maintenance outages. A 24-hour operating schedule alone does not prove that all solar output will be used.
- Factory expanding production: Compare present demand with a separate expansion scenario, identifying the commissioning date and evidence behind forecast consumption.
Ask the assessor to use interval load data where available. Monthly bills help establish the starting point, but a time-based comparison gives the operations team a clearer view of how generation and demand overlap.
Is Solar ATAP or SELCO better for industrial solar payback?
There is no universal winner. Compare feasible designs using the same demand records, equipment assumptions and evaluation period. Include connection work, controls, any required storage, applicable charges, maintenance and equipment replacement assumptions.
Keep the programme decision separate from financing. A cash purchase, loan or proposed power purchase agreement changes ownership and cash flow; the technical and programme assessment still needs to stand on its own. Ask who carries performance risk and which costs remain with the factory.
What should you prepare for an industrial solar assessment?
Share twelve months of electricity bills where available, interval consumption data, shift schedules, weekend and holiday shutdowns, and planned changes in production. Include the facility location, supply voltage, roof drawings and electrical single-line diagram if available. Identify the electricity account holder and whether the factory owns or leases the site.
Existing solar installations, shared premises and unusual supply arrangements should be disclosed at the outset so eligibility can be checked before a programme is recommended.
Discuss your facility with Candela to start a site-specific review. Explore our commercial and industrial Solar EPCC service for project delivery and monitoring and maintenance for care after handover.
Official sources and review scope
We checked the sources below on 14 October 2026. SEDA’s programme page listed the ATAP guidelines dated 30 December 2025 and a contract updated 1 April 2026; ST’s SELCO page linked the June 2026 revision. Confirm current requirements again when preparing an application.
- SEDA: Solar ATAP programme documents and application information.
- SEDA: Solar ATAP eligibility, capacity and contract guidance.
- Energy Commission: Solar ATAP guidelines.
- Energy Commission: current SELCO guidance and notices.
This article explains planning considerations. It does not establish eligibility, connection approval or guaranteed savings for an individual factory.