Extend warranty. Go to top. Fronius Solar.web is an online portal with free and easy registration for photovoltaic system operators. Downloads It provides users with a convenient and clear way of monitoring and analysing their entire solar energy system – either at home from their PC or on the move via their tablet or smartphone. However, Fronius will not bear any costs for assembly or disassembly, or for working hours, transport or other services. You have no permission to access this site. With the Fronius Warranty, Fronius provides the relevant spare part or an equivalent replacement device in the event of a claim. Choose the right warranty model for you.