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Q0065

Could EVs eventually become part of Malaysia's electricity storage and grid-balancing system?

Primary Category

Smart Grid & Digitalisation

Question Type

Technology

Tags

Smart Grid; Digitalisation; Grid; EV

Short Answer

Yes, but smart charging should come before widespread vehicle-to-grid export. Malaysia can first manage when EVs charge so they avoid local peaks and absorb lower-cost or renewable electricity. Bidirectional vehicles could later supply buildings or the grid, but this needs compatible cars and chargers, communications standards, approved connection rules, aggregation, compensation and evidence that battery wear and driver inconvenience remain acceptable.

Why This Matters

EV batteries will represent a large pool of storage that is purchased primarily for transport. Coordinating charging could reduce grid stress and renewable curtailment, while uncontrolled charging could create new evening peaks and accelerate local network upgrades.

What We Know

1. Managed charging provides value without exporting power

Unidirectional smart charging can delay, slow or accelerate charging within the driver's required departure time and minimum state of charge. It is simpler than bidirectional operation and can respond to tariffs or network limits.

2. Bidirectional use has several levels

Vehicle-to-load powers individual devices. Vehicle-to-home or building supports onsite loads and backup. Vehicle-to-grid exports through an approved connection and may provide energy, frequency response or local network relief.

3. Availability is constrained by mobility

The vehicle must be plugged in, have sufficient charge and remain available long enough. Workplace fleets, buses, delivery vehicles and cars parked overnight may be more predictable than a dispersed private fleet.

4. Hardware and software must interoperate

Compatible vehicles, bidirectional chargers, metering, communication protocols, charger-management systems and aggregator platforms must exchange state of charge, departure time, grid signals and safe operating limits.

5. Battery and warranty effects need transparent treatment

Extra cycling can cause degradation, although managed operation may avoid damaging states or temperatures. Owners need compensation that exceeds incremental wear, conversion loss and inconvenience, supported by warranty terms.

6. Local network conditions matter

Charging flexibility can reduce transformer and feeder peaks. Export could help during a constraint but can also create reverse flow or voltage problems. Programmes need location-aware control rather than a national price signal alone.

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