Trending high in our MOST frequently asked questions list, these should be of interest.
Design is (almost) as simple as the installation process. Take a look at our Design Guide on the Resources page. There are no parts to assemble, so you don’t need a design program to determine your bill of materials. Send us your array layout and we’ll tell you how many Tesserack mounts and fasteners you need. Simple!
We fulfill all orders ourselves from our warehouses. Send us a note through the “tell me more” contact page and we will get right on it.
Tessolar’s composite is a commercial plastic reinforced with glass fibers to provide strength. We are former aerospace engineers and will use the most appropriate material for our designs. Molded composite parts can be made more complicated at lower cost compared to metal. The more complicated parts are what allow us to provide a fully assembled mount that provides all of the ease of use and performance that you asked for.
The exact composition is proprietary, but this composite has a long history of outdoor use. It has passed UL testing requirements for resistance to UV rays and, in testing, loses only about 5% of it’s strength after laboratory exposures equal to over 20 years. In other words, it’s really stable and independently certified for this type of use. It took Tessolar over a year to qualify this material and we offer a 25 year warranty to back up our testing.
Fun question! Tesserack is a registered trademark of Tessolar Inc. The word was derived from the word “tesseract”, which is a 4-dimensional cube in mathematics – please don’t ask us to draw it! The name Tessolar came from the Latin word “tesselation” which is essentially a 2-dimensional mosaic. We are M.C. Escher fans.
Yes, we typically recommend an east-west (E-W) orientation rather than south (or north for our southern hemisphere customers) for the ground mount systems. Unless your site is at high latitudes, an E-W array will often prove to be a great option. The primary benefits include:
- Lower wind loads (often leading to lower cost)
- Higher array power density due to low tilt angles
- Flatter daily power yield curve
Wind tunnel load testing for the east-west configuration was conducted exclusively for Tessolar by CPP Engineering, recognized experts in wind testing and analysis. The results revealed that wind loads for the E-W array are MUCH lower than assumed by standard ASCE 7 codes.
Tessolar typically uses a 10 degree E-W tilt, which virtually eliminates row-to-row shading, allowing about twice the power in the same area as a single axis fixed tilt array. This higher power density can be used to increase array size when the site is area constrained, or to offset the small drop in output for the E-W orientation.
We have also conducted extensive array power and energy yield modeling for a broad range of latitudes so we can provide guidance on any trade-off in total array energy yield versus time of day power output.
No two projects are remotely the same. We try to tailor our services and hardware recommendations to meet your project goals and budget, providing the highest level of service in the most efficient manner.
Flashings are a relatively recent change for asphalt shingled roofs and are not necessary for all types of mount. We do recommend a flashing for the Tesserack RS, which has only one mounting point. The Tesserack Z has two mounting points that provide extra stability and allow the use of a butyl rubber seal on shingled roofs. When installed according to directions, butyl rubber seals provide all of the weather protection of a flashed system, but with much faster installation and lower cost. Lab samples have endured over 25,000 simulated inches of rainfall with no leaks!
The Tesserack Z for corrugated metal roofs uses a conventional neoprene seal. Hardware installed in India has been through multiple monsoon seasons with no issues.
The Tesserack Z is delivered with a seal appropriate to your job.
No, the “Z” is fixed height, approximately 4.5″ above the mounting point. The Tesserack RS, currently in development for U.S. certification, provides over 1.5″ of height adjustment. Stay tuned for availability. Meanwhile, consider whether leveling is really required and whether the Z can fill your needs.
Nothing explains better than hands on. Check out the video link on our home page for the next best thing. The short answer is that the flange on the underside of the aluminum frame slides into a clip on the top of the mount. This is essentially the same as bolting onto the frame, but without dealing with the nuts and bolts and torque settings. Everything gets locked in place by snapping the mount down into its base rail by pushing down on the module frame. Can’t be much simpler.
An interesting benefit of attaching the clip to the bottom of the frame is that the module is actually pulled tighter into the mount with increasing wind load. Unlike a top clamp, it can’t accidentally release from the mount and the layout tolerances can be relaxed.
All of our hardware comes with a limited 25 year materials and workmanship warranty. This is longer than many metal parts suppliers, but we want to both be consistent with the module warranties AND to demonstrate our confidence in the hardware. The general terms are consistent with industry standards.
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