Generator manufacturer Generac Holdings plans to add over 400 new jobs at its factories in Waukesha and other Wisconsin communities to meet increased demand, the company announced Monday.

The company plans to add 300 to 400 jobs in Waukesha, Whitewater and Eagle, along with 50 to 60 jobs at its recently acquired Magnum Products subsidiary in Berlin. Magnum makes portable light towers used at construction sites.

Waukesha-WI based Generac, which now has 1,500 to 1,600 Wisconsin employees, plans to hire most of the new workers within 90 days, said company spokeswoman Heather Shannon Gaedtke. All of the new employees will be hired within the next year, she said.

Generac won't release pay data, but says all of the jobs pay family-supporting wages and salaries, Gaedtke said.

The company isn't receiving any public financing assistance in connection with the expansion, she said.

"This is all privately financed," Gaedtke said. "Their sales have skyrocketed."

Generac on Nov. 1 reported that its third-quarter profit increased nearly 63%, to $37.4 million, or 55 cents a share, compared with $23 million, or 34 cents a share, for the same period last year.

Sales jumped 49% to $239.3 million, compared with $160.7 million last year.