It's not just solar panels anymore, they now have many products out there "like solar asphalt shingles". Uni-Solar is one maker of this great new product. They look just like asphalt shingles. To minimize interconnects, they come in 4'x8' sheets.The product is the best when going solar. The sheets can't be cut, so you need a roof with lots of space where there is nothing sticking up out of it (vents, skylights, chimneys). The PV shingles are nailed onto the plywood sheathing of the roof, interconnections are made under the plywood. Regular asphalt shingle are used to fill in around the edges. Shingles that are used will match the existing color. The DC electricity from the shingles is then routed to a battery bank or inverter, usually a electrician is needed for that process. Solar panels and photovoltaic shingles both collect sunlight and they convert it into energy. Solar shingles, are a photovoltaic roofing material that closely resembles standard asphalt shingles.