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Circular economy and solar power at CSB

Since 2003 we have put used plastic back into production. Since 2025 our factory roofs also generate electricity.

250 KT+plastic recycled01 / 06Collect

PE/PP film and production scrap are collected from plants and partners.

250 KT+plastic recycled
3 GWh+solar power generated & used
1,350 kWprooftop solar capacity
2003recycling since

From linear to circular

In a linear economy plastic is used once and thrown away. In a circular economy it becomes raw material again.

Linear

  1. Take
  2. Make
  3. Use
  4. Discard

Resources run out and plastic waste builds up in landfill and nature.

Circular at CSB

  1. Use
  2. Collect
  3. Recycle
  4. Use again

Used plastic is sorted, washed and pelletised, then made into new products.

Reduce, reuse, recycle

  1. Recycle

    Used plastic is processed on EREMA lines into pellets. More than 250 kt is back in production.

  2. Reuse

    Durable PP products such as folding boxes, containers and pots are used again and again.

  3. Reduce

    Recycled pellets reduce the need for new resin, and rooftop solar reduces power from the grid.

EREMA TVEplus recycling line at a CSB plant

Recycled on EREMA lines from Austria

PE/PP film and production scrap are sorted, washed and processed on EREMA TVEplus lines into pellets for our own production and for customers.

HDPE / PE pellets
CSB team with an EREMA technician
EREMA machine control panel

3 GWh+ of power from our roofs

In April 2025 CSB inaugurated a 1,350.18 kWp rooftop solar plant with Suryanesia. Since then the panels have generated, and the plants have used, more than 3 GWh of electricity.

Installed capacity
1,350.18 kWp
Generated & used
3 GWh+
Operating since
April 2025
Partner
Suryanesia
Read the inauguration story

Scroll the page to move the sun from morning to evening

Time 11:00Relative output 0%

Illustration. Real production figures are alongside.

Energizing the 1,350.18 kWp plant with Suryanesia, May 2025
From the roof to the plant grid

Energizing day for the rooftop plant

The roof panels connect to inverters and an AC combiner, then synchronise with the PLN grid. Since that day solar power has gone straight into production.

Plant capacity
1,350.18kWp
Estimated yearly output
2.07GWh
Estimated CO₂ cut per year
1,626tonnes

Estimates from the Suryanesia system specification.

Aerial photo of solar panels on the PT. Cave Sumber Berkat factory roofs

Installing solar panels on CSB roofs

Suryanesia crews fitted thousands of modules across our factory roofs, row by row.

CSB factory roofs covered in solar panels
Three technicians fitting solar modules on the factory roof
Solar technicians on the CSB factory roof
Two technicians laying solar panels onto the roof rails
Technician in a safety vest receiving a solar module
Team carrying solar panels across the factory roof
Inverter station of the 1,350.18 kWp PT. Cave Sumber Berkat solar plant
Rows of installed solar panels on the CSB roof
Signing the CSB and Suryanesia solar partnership

Photos and video: Cave Mekar Group and Suryanesia.

Related reading

Common questions

What is a circular economy in plastics?
A model where plastic does not end as waste. Used plastic is collected, sorted, washed and processed back into raw material for new products.
How much plastic has CSB recycled?
More than 250 kt (250,000 tonnes) of plastic since CSB started in 2003.
How big is the CSB rooftop solar plant?
An installed capacity of 1,350.18 kWp, inaugurated in April 2025 with Suryanesia, which has generated and used more than 3 GWh of electricity.
Is the solar power used on site?
Yes. Power from the panels runs CSB plant operations and reduces electricity drawn from the grid.
Which machines are used for recycling?
EREMA TVEplus recycling lines from Austria, which melt, filter and pelletise the plastic.

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