Renogy 1000 Watts Monocrystalline PV Grid-Tied Solar System Solar Panel Kit UL Listed EL tested solar modules; no hot-spot heating guaranteed. Authorized UL 1703 photovoltaic modules and panels. Monocrystalline panels provide the most efficiency at approximately 15.4% per space. Guaranteed positive output tolerance (0-3%); withstands high winds (2400Pa) and snow loads (5400Pa). Perfect for residential and commercial rooftop systems to decrease your electrical bill, or for large off-grid systems as well. Claim up to 30% of the cost of your new solar system for your home, including both equipment and installation, for tax credit.