CFA responded to a fire on a solar farm in Raywood, outside Bendigo at about 5.50pm on Thursday 20 February.
Ten CFA units from Bridgewater, Campbells Forest, Eaglehawk, Golden Square, Raywood and Woodvale attended the scene.
FRV, VicPol and Powercor were also on scene.
One of the invertors had caught fire in a moderate sized commercial solar farm and crews used foam to extinguish it once the power was isolated. The invertor transfers power from the solar farm to the high voltage lines and batteries.
CFA Commander Craig Houlahan said the emergency management plan developed in conjunction with the Raywood Fire Brigade was part of the great success in suppressing the fire.
"The brigade captain understood the risks, which are not normal to their environment," Craig said.
"They knew how to gain access, contact the relevant agencies and property owner and understood what the risks were.
"Because of this information the brigade was able to contain the fire to the facility once all power was isolated by the property owners."
A warning was put out to the Raywood community because of the black toxic smoke drifting over the township.
Access was difficult for crews because of the density of the smoke.
The scene was under control at about 8.30pm. Energy Safe Victoria are investigating.