The findings of a new Victorian renewable energy group to improve the sector will be used by the Greens as a bargaining chip in upper house negotiations with the Labor government.

The Greens have invited industry and experts to help tackle Victoria's low investment in renewable energy, under a Greens plan.

Last year the Climate Council found that Victoria had the least favourable regulatory conditions of any Australian state for renewable energy.

Greens Melbourne MP Ellen Sandell is hosting a meeting next month with experts from the sector to address the state's poor performance and has invited Premier Daniel Andrews and Industry Minister Lily D'Ambrosio. Both said they would not be attending.

The Greens, who hold five critical upper house votes, say the roundtable will produce a plan for how to bring jobs in clean energy to Victoria, accusing Labor of having no real plan for the sector at last year's election.