In this solar roofing guide you will learn about the pros and cons of metal roofing with laminated thin-film PV panels such as the ones manufactured by Uni-Solar Ovonics, or simply UniSolar, which is an Energy Conversion Devices company/brand.
UniSolar thin-film solar panels have been specifically designed to be installed with a standing seam metal roof and have a nominal width of 15.5 inches, which fits perfectly onto a 16″ standing seam panel. With a special butyl adhesive backing, the installation of thin-film solar panels is very simple and fast.
Watch how the the solar metal roof is installed and how free electricity is produced right away:
Benefits of Solar Metal Roofing and Roof-Integrated Solar Systems
Installing a solar metal roof is the most cost effective way to get a lifetime roof together with a solar PV system. The savings come from the fact that the installation of a solar power system is greatly simplified, because there is no need to install the racking system, which is needed to hold your conventional solar panels. This saves you about $1 (one dollar) per watt DC of solar system, and eliminates an additional $0.50 per watt for the installation of the racking system and solar panels. With thin-film solar PV laminates, the installation is reduced to cleaning the inside of the metal roof panels, applying and rolling in the PV laminate and installing the metal roofing panels.
Later, when all the standing seam metal roofing panels have been installed, the solar integrator connects the mom and pop contacts on each solar panel to form one, two or more strings of solar panels, and runs the wiring down to the inverter, which then converts the DC power from solar panels into AC power at 240 volts and feeds the electricity into your home’s power network. All excess electricity is sent into the grid (for grid-tied solar systems), or to your storage batteries (for off-grid systems).
Why use a Roof-Integrated Solar System vs. Conventional Solar Panels?
The main problem associated with general solar PV systems that you can now see on many homes around the country, is the fact that an asphalt shingles roof will fail much sooner than the PV solar panels. When that happens, those homeowners will be faced not only with the re-roofing expense, but also with complete removal re-installation of the solar array. This MUST be performed by both the roofer and the solar integrator, as the roofer alone will 99% of the time screw things up. And bear in mind that a roofing warranty will usually not cover damages to the solar equipment, let alone all the possible short-circuit type situations.
Solar Metal Roof Installation Video:
The additional cost associated with these procedures should be at-least the same as the cost of the new roof itself. Think about it: Electricians unlike roofers have to be licensed. An apprentice electrician needs at-least 4 years of schooling/work experience. This is like an undergraduate degree. A master electrician needs another 4 years. Therefore, electricians usually charge $75-100 per man-hour. You’ll need at least two electricians for this job, which will take a whole day to remove the panels and another day to put them back, if not more.
The math is simple: 2 guys * $75/h * 8 hrs. * 2 days = $2400 plus any possible parts and supplies that may be required. So let’s say it costs you $2500 extra. In some parts of the country that is how much an average 1200 sq. ft. cape house roof will cost to install (materials included).
Thin Film Solar Panel Installation Video:
Metal Roofs vs. Asphalt Shingles
Unlike the very “popular” asphalt shingles, metal roofs are pretty much permanent. They are for the most part manufactured from recycled metals, and when installed by a trained professional, they will not leak for decades.
Metal roofs combined with Renewable Energy technologies can create an ideal, long lasting and affordable solution for residential Solar Electric and Solar Hot Water needs.
There are other numerous benefits to having a metal roof combined with Solar PV and other renewable energy technologies. When looking at a metal roof vs. asphalt shingles, also consider that a metal roof will save our landfills from getting more shingles dumped there in 10 years or so. With metal, you get a beautiful, permanent roofing solution that you can combined with a solar system, and if you choose to add a Geothermal system, you can design a 100% energy-free home!