Forbes contributors publish independent expert analyses and insights. Dianne Plummer is the Lead Consultant of STEM Spark Solutions. Rooftop solar has become one of the fastest-growing clean energy ...

We may receive a commission on purchases made from links. If you see a solar-powered RV or a van, you're bound to notice panels installed on the roof or even lying down on the ground pointed at the ...

We independently review everything we recommend. We may get paid to link out to retailer sites, and when you buy through our links, we may earn a commission. Learn more› By Tim Heffernan Tim Heffernan ...