Frequently Asked Questions
Here are a few we think might be important….
LPP-175 module’s thin glassless ETFE front sheet (2mil/50um) enables more effective heat removal from the front side of the module than modules with a thick glass front sheet (~3mm). Direct radiation from PV cells, a shorter conduction path, and convection work together to cool the LPP-175 modules from the front side of the module. Additional natural convection of heat through the air pathways on the back (substrate) side add more cooling power.
Extensive outdoor test results as conducted by Fraunhofer CSE, have shown that shingles covered by LPP-175 modules are cooler during the day, and warmer at night than shingles without modules. As a result, shingles with an installed LPP-175 system experience less extreme temperature swings than without.
Yes, the modules can be easily removed and re-installed in the event of roof repairs or replacement. Module removal can be achieved by using a utility heating blanket over the module. Installers may refer to the LPP-175 install manual for detailed removal instructions.
The first generation of the Lumeta Peel-And-Stick LPP-400 commercial module was deployed in Europe in 2010. Installed modules are all outperforming PVsyst modeling in Europe.
Lumeta LPP-175 modules are designed to be semi-rigid, so they conform to roof undulations, which exist on virtually all roofs. Extensive dynamic and static mechanical tests have been performed at 3rd party test labs. Repeated flexing of the module did not result in visible damage to the C-Si cells, and electro-luminescence (EL) images showed no cell micro-cracking after multiple tests.
Dynamic testing of the modules have shown that module bending will not affect the cell interconnection ribbon.
LPP-175 modules and shipping crates have been tested to and meet the ISTA-2B 2011 standard. No module/cell damage was detected, after inspection utilizing electro-luminescence (EL) imaging, following transportation tests.
The LPP-175 modules have proprietary “on-board wire management” where there are wire clips for the pigtails, jumpers and homerun cabling. Some installation may require a small piece of EPDM wire tray for the jumpers and homeruns where they cross over the shingle roof.
Lumeta has partnered with Royal/ADCO, the fifth largest adhesive and sealant manufacturer in the world. The adhesive utilizes the same chemistry as an adhesive that’s been widely and successfully used in the roofing industry for over 30 years. Test protocols used were developed by Royal/ADCO, Fraunhofer CSE, and one of the largest asphalt shingle manufacturer in the country world.