The Malaysian Statistics Department said in a statement, the electricity index increased 5.8 percent year-on-year and manufacturing index rose 4.3 percent.
Driven by the natural gas index, the mining sector output also grew 2.3 percent, the highest level since September 2017.
For January to April, the IPI recorded an annual growth of 3 percent, as electricity and manufacturing sectors expanded 5.8 percent and 4.1 percent respectively. The mining sector, however, declined 0.9 percent.
In a separate statement, the Malaysian Statistics Department showed that the country's manufacturing sales grew 6.8 percent year-on-year to 69.9 billion ringgit (about 16.79 billion U.S. dollars) in April.
The sales were driven by the increase in non-metallic mineral products, basic metal and fabricated metal products, electrical and electronics products, as well as petroleum, chemical, rubber and plastic products.