LSS6 and the battery era: what the latest solar tender signals

Malaysia's largest solar tender is the first to make battery storage mandatory. Here is what was offered and why it matters beyond solar farms.

In July 2026 the Energy Commission opened bidding for the sixth round of the Large Scale Solar programme, known as LSS6. It is the biggest round so far, and the first in which most of the solar must come with battery storage.

What was offered

• About 2,650 MW of solar together with about 1,250 MW of battery storage, across three packages.
• The largest package offers 2,200 MW of solar paired with 1,100 MW of batteries and is open to all qualified developers.
• Two packages are reserved for Bumiputera developers, including 150 MW of solar without storage.
• All plants are to be in commercial operation by 31 December 2029.

The government expects the round to attract RM13 billion to RM15 billion in private investment and to create 15,000 to 20,000 jobs during construction. Analysts at Maybank expect contracts to be awarded by the second half of 2027.

Why storage is now required

Solar produces most at midday, while demand stays high into the evening. As more solar is added, the grid needs a way to move daytime energy into the evening. Batteries do that, and they also help keep the grid stable when clouds pass.

New safety rules for batteries

Alongside the tender, the Energy Commission has issued its Guidelines on Battery Energy Storage System (BESS) Safety (GP/ST/No.62/2026). They cover lithium-ion battery systems in homes, commercial buildings, industry and utility plants. Among the requirements:

• Outdoor installation is recommended. Outdoor enclosures must be rated IP54 or higher.
• Battery packs must meet standards such as IEC 62619.
• A competent person must be appointed for design, installation, operation and maintenance.
• Systems need protection against thermal runaway, the chain reaction behind battery fires.