Industrial estates offer the 100 gigawatt solar programme a ready source of demand

Indonesia's 100 gigawatt peak (GWp) solar programme has gained an important ally in the industrial sector. In statements carried by ANTARA on 2 October 2026 and by detikFinance on 3 October, the Indonesian Industrial Estate Association (Himpunan Kawasan Industri, HKI) welcomed the programme launched by President Prabowo Subianto and put forward a practical proposal: let industrial estates act as anchor demand centres for the new solar capacity.

The association's chairman, A Ma'ruf Maulana, framed the target as a national effort that deserves collective support. His central point was about what comes after installation. The measure of success, he argued, is how much of the energy produced can actually be delivered and put to productive use, not only how many panels are installed.

What the industrial estates are proposing

HKI's message rests on a simple idea. Generation, the grid, storage and demand should grow as one integrated system. Each of these four elements moves at its own pace, and when one runs ahead of the others, bottlenecks appear. Planning all four together from the outset is the way to keep them in step.

Supply and demand must meet from the planning stage.

That line, attributed to the HKI chairman by ANTARA, captures the proposal in a single sentence. It is a constructive contribution to a programme that is now moving from launch into delivery.

The association identified industrial estates as a natural place to start. An estate concentrates large electricity needs in a defined area. Its tenants, consumption patterns, expansion plans and clean energy requirements are relatively easy to map and to aggregate. For grid planners, that is valuable information. A known, growing and concentrated load is exactly what a large solar build needs in order to be absorbed efficiently.

HKI also suggested that renewable energy planning be aligned with industrial growth mapping. That would bring together the location of industrial hubs, projected electricity demand, grid readiness and clean energy needs, coordinated across the central government, PLN, regional governments, estate managers and businesses.

Why intermittency shapes the plan

Solar output varies with the time of day and with the weather. The HKI chairman noted that this calls for a flexible electricity system, built on stronger transmission and distribution networks, battery energy storage systems, grid digitalisation and active load management.

Industrial estates can help on several of these fronts. Many factories run predictable daytime shifts that line up well with solar output. Estate managers already operate internal distribution networks and substations, which makes them experienced partners for load management. And because estates negotiate supply on behalf of many tenants, they can aggregate demand in a way individual firms cannot.

This is also where energy efficiency enters the picture. Every kilowatt hour a factory saves through better motors, heat recovery or smarter controls is a kilowatt hour that does not need new generation, transmission or storage. An estate that pairs clean supply with efficiency programmes for its tenants makes the whole system lighter and the solar programme easier to integrate.

The infrastructure already in the plan

The proposal builds on commitments that are already part of national planning. PLN's electricity supply business plan for 2025 to 2034 (RUPTL) adds 69.5 GW of new generation capacity, according to Dunia Energi's coverage of its release. Of the renewable portion, solar accounts for 17.1 GW, hydro 11.7 GW, wind 7.2 GW, geothermal 5.2 GW and bioenergy 0.9 GW. The plan also includes two 250 MW nuclear units in Sumatra and Kalimantan.

On the network side, PLN plans 47,758 kilometres of transmission circuits and 107,950 MVA of substation capacity, as Energika reported. Java, Madura and Bali account for 13,900 kilometres of that, Sumatra 11,200, Kalimantan 9,800, Sulawesi 9,000 and Maluku, Papua and Nusa Tenggara 3,900. Four inter-island links are planned, including Java to Bali, Sumatra to Batam and Bintan, Sumatra to Java and Kalimantan to Tarakan.

Storage is part of the same plan, with 10.3 GW of capacity combining pumped storage hydropower and battery systems. Reports differ on the exact split between the two technologies, so Sirkularium cites the combined figure.

The 100 GWp programme sits on top of this foundation. It was formally launched in August 2026 with 14 solar plants totalling 5.3 GWp as the opening phase, according to the Ministry of State Secretariat. Industrial estates offer a ready set of destinations for that power as it comes online.

The investment case for verifiably clean power

HKI connected its proposal to investment. Global supply chains increasingly ask manufacturers to cut emissions and to show that they use renewable energy. For companies choosing where to build, access to clean power is becoming part of the location decision. According to detikFinance, the HKI chairman summed up what investors look for: energy that is reliable, competitive and verifiably clean.

Clean energy that is reliable, competitive and verifiable is becoming part of what makes an industrial location attractive.

The word verifiable matters. Buyers in export markets want evidence that the electricity behind a product is renewable. Estates that can offer metered, documented clean supply give tenants a clear advantage in those conversations, and give Indonesia a stronger case as a destination for quality investment.

Independent research points in the same direction. A May 2026 report by Systemiq and the Green Transition Initiative of the Institute for Development of Economics and Finance (INDEF) describes Renewable Energy Zones as the link between renewable supply and industrial demand. Across eight Special Economic Zones, the report estimates USD 13 to 18 billion in capital expenditure and 24 to 32 TWh of renewable generation. Scaled nationally, it sees 85 to 101 TWh of clean power and up to 100,000 new jobs across the industrial base. The report also notes that renewable projects currently take more than 48 months from origination to financial close, a timeline that coordinated zone planning could shorten.

Sirkularium's view

HKI's proposal is constructive and timely. The 100 GWp programme has set a clear national direction, and the RUPTL already provides the grid and storage backbone. What industrial estates add is a well defined, aggregated and growing demand that can be planned alongside new supply. That combination supports both the energy transition and the industrial growth agenda at the same time.

For government and public institutions, Sirkularium sees four practical steps.

First, demand mapping. A shared dataset of industrial estate loads, expansion plans and clean energy requirements, prepared with estate managers and PLN, would help prioritise which solar sites and grid upgrades serve industry first.

Second, efficiency before new supply. Energy audits and efficiency programmes inside estates, from compressed air and motors to heat recovery, reduce the load that new solar and storage must meet. They are usually the lowest cost decarbonisation measure available and they make integration easier.

Third, verifiable clean supply. Mechanisms that let estate tenants document the renewable origin of their electricity, such as renewable energy certificates and green supply arrangements, respond directly to what export buyers and investors are asking for.

Fourth, coordination across levels of government. Aligning regional spatial plans, estate development and PLN network planning would help each of the four elements HKI highlighted move at a compatible pace.

What to watch next: how the next phases of the 100 GWp programme are sited relative to industrial demand, whether pilot partnerships between PLN and industrial estates emerge, and how the Renewable Energy Zone concept is taken up in regional planning. Sirkularium welcomes the industrial sector's support for the programme and stands ready to work with public institutions, estate managers and industry on demand mapping, efficiency and clean supply planning that help the 100 GWp ambition deliver real value to the economy.