109 Scenic Loop, Boerne, TX  78006 • (830) 755-8699 • info@renergysolar.com


Roof Direction


South-facing roofs are ideal because they get the most sunlight throughout the day. However, panels on East- or West-facing rooftops can produce enough energy to reduce your electricity bills, save money, and reduce your carbon footprint. 

Roof Pitch Angle

Solar panels can be installed on flat roofs and those with a pitch between 15 and 40 degrees.

Roof Size and Shape


Installation on a large square roof is easiest; however, solar energy systems are versatile and may be installed on many surface types.  A general rule-of-thumb is: approximately 100 square feet are needed for every kilowatt (kW) of panels installed.  A typical residential system will require about 500 square feet of space.

Although the location of skylights, pipes, and chimneys can affect the amount of space available for panel installation, Renergy Solar will design the panel layout around potential obstructions to maximize electricity production.

Roof Shading

The amount of energy produced is directly proportional to the length of time the panels are exposed to sunlight throughout the day.  Shading, caused by trees, buildings, or other structures, can reduce the amount of electricity production.

Roof Age

Before installing a solar energy system on your roof, it is imperative that the structure be in good condition.  Solar panels can last >25 years and having to remove them to replace your roof soon after installation will result in unnecessary extra costs. Renergy Solar recommends the 5-year rule, that is, consider replacing the roof prior to installation if you anticipate doing so within the next 5 years. 


Renergy Solar grew out of an established and successful local roofing company (www.williamsonroofing.com).  If necessary, we will have a roofing professional conduct a free evaluation of your roof prior to installation.

Roof Material

Solar panels are compatible with most roofing materials, including composite, wood, cement tile, slate, tar and gravel, or metal.

Is your roof suitable for solar installation?

Solar panel systems can be installed on most roofs. Considerations when designing your system will include:

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