Renewable Energy · Indonesia

Sustainable sources, one purpose: a cleaner grid for Indonesia

PT Green Sumatra Lestari develops and supplies renewable energy across four technologies — biomass, wind, solar, and hydropower — rooted in Sumatra and built to serve Indonesia’s wider energy transition.

View Our Portfolio See Our Progress vs. National Targets
4
RENEWABLE TECHNOLOGIES
15.75%
INDONESIA’S RENEWABLE MIX, 2025
Green Sumatra Lestari mark
GREEN SUMATRA LESTARISUSTAINABLE NEW & RENEWABLE ENERGY SOLUTIONS
About Us

Built as a renewable energy company from day one

PT Green Sumatra Lestari was founded with a renewable energy mandate, not a single-technology one. Biomass was where we built our first operating capability, refining Sumatra’s agricultural and forestry residue into industrial fuel — but the intent from day one was a broader portfolio across biomass, wind, solar, and hydropower.

That portfolio approach is active across all four technologies today: evaluating sites, supporting project development, and supplying the domestic market as Indonesia works to close the gap between its renewable energy ambitions and what is actually installed today.

Multi-Technology

One company working across biomass, wind, solar, and hydropower rather than a single source.

Sumatra Rooted

Headquartered in Banda Aceh, with sourcing relationships built across the island since our founding.

Evidence-Based

Every claim on this site is checked against the same national data we track for our own planning.

Built to Scale

Domestic supply today, with the logistics and partnerships to extend further as demand grows.

Portfolio

Four renewable technologies, one company

Each technology plays a different role in Indonesia’s energy mix — we work across all four rather than betting on one.

Biomass

Currently sourcing from and supplying Aceh and North Sumatra — palm shell, rice husk, wood residue, and our own Kebun Energi farm.

GROWING OUR OWN SUPPLY

Wind Power

Site evaluation currently underway in Aceh, alongside national tracking of proven corridors like South Sulawesi’s wind farms.

SITE EVALUATION

Solar Power

Site evaluation currently underway in Aceh, informed by Indonesia’s largest projects in West Java and floating solar at Cirata.

SITE EVALUATION

Hydropower

Monitoring Indonesia’s largest renewable energy category by installed capacity, from mini-hydro to major reservoir plants.

MARKET MONITORING
Approach

How we evaluate and develop across four technologies

The same discipline applies whether the source is a palm mill or a river — assess, structure, deliver, operate.

01

Assess

Resource and site assessment against Indonesia’s existing installed base and grid access.

02

Structure

Feedstock contracts, offtake terms, and partnerships structured to the technology and buyer.

03

Deliver

Fuel supply, equipment, or project delivery managed to specification and schedule.

04

Operate

Ongoing quality control and reporting, domestic delivery today with export logistics ready as demand grows.

Sustainability

Diversifying away from a single renewable bet

Indonesia’s Enhanced NDC (2022) commits to a 31.89% unconditional and 43.20% conditional emission reduction by 2030 against a business-as-usual baseline — the national climate target our own renewable energy work sits inside.

Less Open Burning

Palm shell and husk once burned on-site are absorbed as a marketable biomass raw material.

Technology Diversification

A four-technology portfolio is less exposed to a single resource, policy, or price shock than a single-source supplier.

Documented Sourcing

Biomass collection points are recorded to support transparency with industrial buyers.

INDONESIA’S RENEWABLE MIX, 202515.75%
KEN TARGET, 203019–23%
ENHANCED NDC TARGET, 203031.89–43.20%
NATIONAL NET ZERO TARGET2060
31.89%
43.20%
0%50%
Current renewable mix Enhanced NDC unconditional / conditional targets
Renewable energy mix is one contributing lever toward Indonesia’s economy-wide Enhanced NDC target, not a direct 1:1 proxy for it. Source: Kementerian ESDM (2025) & Indonesia’s Enhanced NDC, UNFCCC (2022).
Markets

Domestic first, with room to grow into export

Our supply today goes to Indonesian power and industrial buyers — export is a deliberate next step, not a current claim.

Current Market
Domestic Indonesian Industry & Power Generation
Future Export Potential — as market grows
Japan
South Korea
China
European Union
Let’s Work Together

Looking for a renewable energy partner across more than one technology?

Whether for biomass supply, or discussing wind, solar, and hydropower opportunities, our team is ready to talk.

office@gres.co.id gres.co.id +62 823-6800-0123