Five years ago, asking a Malaysian homeowner to add a solar battery on top of their PV system was a hard sell. Lithium prices were high, payback periods were brutal, and Net Energy Metering (NEM) made grid export so attractive that on-site storage was almost always uneconomic.
That equation has now flipped. In the space of six months, three things have happened that change the calculus for every Malaysian household and business considering solar in 2026:
- Sabah inaugurated Southeast Asia's largest battery energy storage system (BESS) in Lahad Datu.
- The Energy Commission opened the MyBEST 400 MW / 1,600 MWh tender — TNB's first utility-scale battery, due to operate by end-2026.
- The new Solar ATAP programme dropped the BESS requirement from 72 kWp down to 1 MWac — meaning most residential and small-commercial systems are now optional, not mandatory, for batteries.
If you've been waiting for the "right time" to think about a solar battery in Malaysia, that moment is here. Below is what changed, why it matters, and what it means for your installation.
1. Sabah's 100 MW BESS — the milestone that signalled the shift
On 12 December 2025, Sabah Chief Minister Datuk Seri Hajiji Noor inaugurated BESS Lahad Datu — Malaysia's first large-scale battery energy storage facility. The numbers are big: 100 MW of power capacity, 400 MWh of energy, built for RM645 million by MSR-Green Energy with Sungrow as equipment supplier. The build was completed in just over one year.
What made the headline isn't only the size — it's that BESS Lahad Datu is the largest battery storage facility in Southeast Asia by output. Sabah relies heavily on diesel generation, so the immediate impact is grid stability and lower fuel costs. The medium-term plan is for utility-scale solar PV in the state to reach 350 MW by 2027 — about 23% of Sabah's generation mix.
For Peninsular Malaysia readers, the real significance is the precedent: large-scale BESS is no longer a "concept project" or a foreign pilot. It's commercially deployed, working, and Malaysian. [Source: Energy-Storage.News]
2. MyBEST: TNB's 400 MW grid battery, online by end-2026
On 3 December 2025, Deputy Energy Transition and Water Transformation Minister Akmal Nasrullah Mohd Nasir confirmed that the Energy Commission has opened the Malaysia Battery Energy Storage Technology (MyBEST) tender — a 400 MW / 1,600 MWh battery system that will sit on the Peninsular Malaysia grid and is scheduled to begin operations by end of 2026.
Why this matters for Solar ATAP customers: rooftop solar generates during the day, but Malaysian electricity demand peaks in the evening (TVs, air-conditioners, lights). Without storage, surplus solar gets exported back to TNB at the System Marginal Price (SMP) — but TNB's grid has limits on how much rooftop solar it can absorb without becoming unstable.
A 400 MW grid-scale battery effectively soaks up that midday surplus, releases it during peak hours, and lets TNB host more rooftop solar without grid instability. In practical terms: the more BESS the grid has, the more generous Solar ATAP export terms can be in future revisions.
The tender requires bidders to outline dismantling, decommissioning, disposal, and recycling procedures — a sign that Malaysia is taking battery-waste impact seriously from day one. [Source: Malay Mail]
3. The rule change: BESS now mandatory only for systems above 1 MWac
This is the change most directly relevant to Solar ATAP applicants. Under the previous SELCO framework, any solar PV system exceeding 72 kWp was required to install battery storage. That ruled out cost-effective batteries for almost all commercial systems.
The Energy Commission's notice dated 31 December 2025 revised this dramatically: "The requirement to install a BESS now applies only to systems exceeding 1 MWac, instead of the previous threshold of 72 kWp." [Source: Baker McKenzie — Malaysia 2026 Updates to Renewable Energy Schemes]
What this means in practice:
- Residential customers (5 kW single-phase / 15 kW three-phase): No mandatory BESS. Adding one is purely optional and ROI-driven.
- Commercial Solar ATAP up to 1 MWac: No mandatory BESS — a huge win for SMEs in Selangor, KL, Penang, and Johor industrial zones.
- Large industrial >1 MWac: Still requires BESS, but with battery prices falling, the project economics now stack up far better than under SELCO 2024.
4. Should I add a battery to my Solar ATAP system?
If batteries are no longer mandatory below 1 MWac, why pay for one? Three legitimate reasons:
A. Hedge against TNB tariff hikes and SMP volatility
Solar ATAP exports surplus at the SMP — a wholesale price that fluctuates daily. A battery lets you self-consume your evening peak rather than depending on the SMP, which is particularly valuable as TNB's domestic and commercial tariffs continue to rise in 2026.
B. Backup power during outages
Standard grid-tied solar shuts off when TNB power fails. A battery with backup capability keeps your fridge, lights, and air-conditioning running for 6-12 hours during a blackout — particularly useful in Klang Valley flood seasons and for rural Selangor / Pahang properties.
C. Maximising solar ROI on commercial premises
For a Bandar Puteri shoplot or Shah Alam factory running peak load 6 PM – 10 PM, a 30-50 kWh BESS shifts solar generation into your peak hours and dramatically improves payback. With GITA tax allowance covering 100% of the BESS capex, the post-tax economics are now compelling.
5. Solar battery costs in Malaysia 2026 — what to budget
Indicative Malaysian retail pricing (lithium iron phosphate, LFP, residential systems):
- 5 kWh BESS (covers ~6-8 hours of essential loads): RM 12,000 - 18,000 installed
- 10 kWh BESS (covers most of an evening peak for a 5-bedroom home): RM 22,000 - 32,000 installed
- 15-20 kWh BESS (full evening + overnight backup, large semi-D / bungalow): RM 38,000 - 55,000 installed
Industrial-scale BESS (50-500 kWh range for factories and shoplots) is priced per kWh and varies by chemistry, inverter brand, and warranty. Expect RM 1,800 - 2,800 per kWh in 2026 — down meaningfully from RM 3,200+ in 2024.
According to SolarQuarter, the falling cost of battery storage is the single biggest catalyst for Malaysia's solar acceleration in 2026 — pushing solar-plus-storage past the breakeven point against fossil-fuel peakers.
6. The road ahead: what to watch in 2026
Three things on our radar for the next 12 months:
- MyBEST tender award (mid-2026) — pending Finance Ministry approval. The winning EPC consortium will set BESS pricing benchmarks for the whole industry.
- BESS requirement for next LSS round — the Deputy Minister has signalled that the next Large-Scale Solar bidding round will require BESS as standard, locking in solar-plus-storage as the new baseline.
- Residential BESS subsidies? Not announced, but with Budget 2026 putting RM16.5 billion of GLIC/GLC capital into renewables, targeted residential battery support is plausible in the second half of 2026.
Bottom line
For most homes and SMEs in Malaysia, a battery is no longer required to participate in Solar ATAP. But it is rapidly becoming the smart, optional upgrade — particularly if you face high evening loads, want backup power, or expect TNB tariffs to keep climbing.
If you're sizing a new Solar ATAP system in Puchong, Selangor, KL, Penang, or Johor, ask us to model both the no-battery and with-battery cases. We'll show you the numbers side-by-side so the decision is based on payback, not hype.
Frequently asked questions
Is a solar battery (BESS) mandatory under Solar ATAP in Malaysia?
Under the Energy Commission's December 2025 revision, BESS is now only mandatory for solar PV systems exceeding 1 MWac. The previous threshold was 72 kWp, so most residential and small commercial Solar ATAP installations no longer require batteries. Adding one is optional but increasingly cost-effective.
How much does a solar battery cost in Malaysia in 2026?
Residential lithium-ion BESS in Malaysia ranges from RM 12,000-18,000 for a 5 kWh unit, RM 22,000-32,000 for a 10 kWh unit, and RM 38,000-55,000 for 15-20 kWh systems. Industrial-scale BESS prices have declined sharply in 2025-2026, making solar-plus-storage projects far more bankable than they were under NEM 3.0.
What is MyBEST and how does it affect Solar ATAP customers?
MyBEST (Malaysia Battery Energy Storage Technology) is the Energy Commission's open-bidding exercise for a 400 MW / 1,600 MWh utility-scale battery storage system. Operated by TNB and starting end-2026, it will absorb daytime solar surplus and discharge during peak evening demand — increasing the grid's ability to host more rooftop solar and supporting more aggressive Solar ATAP export rates.
Where is Malaysia's biggest battery storage system?
BESS Lahad Datu in Sabah, inaugurated on 12 December 2025, is Malaysia's first large-scale battery energy storage facility and the largest BESS by output in Southeast Asia at 100 MW / 400 MWh. It was developed by MSR-Green Energy with Sungrow equipment at a cost of RM 645 million.