About 1/2-in. thick, Wetwall is waterproof and durable. Its available in a wide array of panel sizes (including custom sizes) and patterns. It can be applied to many existing surfaces, including tile.

After those additional costs are factored in Silfab solar panels will fall between $2.85 and $3.05 per watt. Using the same average 6kW system as before, after factoring installation a Silfab ...