Groups of renters could share a "garden" of solar panels and the technology would be encouraged in public housing and aged-care homes in a $98.7 million Labor push to bring the "solar revolution" to those who do not own their homes.

The details came as the Greens announced a plan to double the number of paid firefighters to battle extreme bushfires, saying renewable energy is important but the effects of global warming are already being felt.

Projects might include shared arrays of solar panels. Credit:Glenn Hunt

Fairfax Media polling this month showed two-thirds of voters believe the federal government is doing "not very much" or "nothing at all" to combat climate change, and Prime Minister Malcolm Turnbull's adherence to policies of the former Abbott administration has been interpreted as a trigger for a fall in his popular appeal ahead of the July 2 election.

In Brisbane on Wednesday, Opposition Leader Bill Shorten spruiked a Labor plan to create up to 10 "community power hubs" to allow more people to access renewable energy. Labor previously flagged the measure in the release of its broader climate election policies in April.