No. The maintenance of a DualSun installation is no more complicated than the maintenance of a standard solar thermal installation. A maintenance contract can be implemented with the installer in order to plan an annual checkup of your installation.
Moreover, you can install a monitoring system in order to track the operation and performance of your installation in real time, without the need for a technical visit. If you detect an issue with your monitoring system, you can then contact your installer to come check up on the installation.