THE Federal Government has boosted its investment in renewable energy through $235 million in funding which will go to four commercial-scale projects.

Resources Minister Martin Ferguson said the funding - combined with money from the successful applicants to the program - will deliver about $810 million in renewable energy investment in Australia.

The funding is expected to deliver almost 80 megawatts of renewable energy generation from wave technology, geothermal sources, and an integrated mini-grid project involving wind, solar, bio-diesel and storage technologies.

The four successful lead companies which will receive the funding boost under the Renewable Energy Demonstration Program are Petratherm, Geodynamics, Victorian Wave Partners and the Hydro-Electric Corporation.