Smaller residential Solar Green Roofs can payback in 7-9 years and depending on cost of electricity and other Green Roof or Solar incentives. Commercial properties, coops and condos have seen paybacks of 3-6 years. The payback also depends on the maintenance of Green Roof and Solar modules - the better maintained the quicker a payback.

Yes, and honestly, it depends on different factors: structural load of the roof, type of existing Green Roof, type of Green Roof system, roof warranty, technical equipment on roof and much more. In any case it worth to explore this option because also there PV will reduce your electricity bill.

Yes, in most communities or cites there so-called Net Metering programs, where building owners with rooftop solar arrays can transfer electricity into the grid. Mostly this exchange of electricity provides credits on utility bills. However, often these electricity rates are rather low and the use of self-produced electricity on the property is much more beneficial. 

Solar Garden Roofs whether with thermal Solar or PV Solar reduce the use of fossil energy sources and so the environmental footprint of your structure and lifestyle will be lowered. Ideally combine Solar Graden Roofs with modern Micro Windmills for a more even and consistent electricity supply.

Solar panels require regular but little maintenance that includes periodic cleaning and wire inspections. We developed spec sheets for the Green Roof maintenance also to maintain the PV at the same time. PV modules come with a 25 years warranty and these are also remotely monitored.