Eco-friendly, electric delivery trucks will cost the same as their diesel equivalents by 2030, according to latest analysis, and investing in fleets of electric cars could already save money for some companies.

But the study, from management consultancy Partners in Performance, found commercial vans could take an extra two years to reach price parity with internal combustion engine vehicles and the path was not as clear for large, freight trucks in Australia.

Partners in Performance Director Brian Innes told AAP more Australian companies were investigating investments in electric vehicles, small and large, to ascertain the best time to upgrade their fleets.

"We are seeing some of the major fleet owners commit to full electrification by 2030," Mr Innes said.