Solar electric (PV) panels* and micro-inverters* come with long life performance and durability warranties, generally 25 to 30 years. Panels are expected to perform and last beyond their warranties because they are a non-mechanical system, with few parts to wear out. Given this long life you want to make sure your roof is in good shape. It is easier to repair and update a roof than to remove the panels later and reinstall them. Solar panels weigh approximately 2.5 lbs/sq.ft., which is equivalent to adding a second layer of shingles.
If you need to update your roof, you may incorporate this expense into your 30% Federal Renewable Tax Credit** for total cost of installing solar energy.
**Roof should be upgraded within the same year as the solar installation.
The facts after you update your roof:
- Solar electrical systems require inspections and professional installation.
- Installing solar electric systems require minimal roof penetrations, low leakage potential.
- The solar panels will shade that area of the roof from harmful ultraviolet sunlight.
- Solar panels also protect your roof from the elements.
- Solar panels generally weigh 2.5lbs./sq.ft., about the same as a second layer of shingles.
- Solar panels are raised above the roof to allow air flow and debris to be cleaned off by the rain and wind.
- In Michigan this is an advantage because of cooler temperatures, therefore panels don't overheat and loose efficiency as they would in warmer climates.
*Manufacturers and model warranties may vary.