Peterborough, New Hampshire [RenewableEnergyAccess.com] Do grid-tied systems really perform the environmental duties that proponents say they do? This week’s guest says that renewable energy systems tied to the grid without battery back up are not reducing the burning of fossil resources to create electricity. Battery-based systems are the only way to impact the base electrical load, says Bill Von Brethorst, President of Planetary Systems Inc.Also in the podcast: Nevada is on track to quadruple its geothermal power capacity in the next 5 years, according to a report from the Geothermal Energy Association. We’ll look at how much geothermal power is expected to come online in Nevada and how other states are learning from this success. Inside Renewable Energy offers the latest in renewable energy news and information.