This is the second of three replacement gas engines at Topi was replaced. After 15 years of service, the 0.952 MW Guascor engine was due for replacement. A new Cummins biogas engine was installed as a replacement. This biogas engine is a major component for generating electricity to sell to the local power grid. It utilizes biogas produced from the palm oil mill effluent treatment system, before the treated wastewater is supplied to the irrigation system within the plantation.