This company specialises in the repair and maintenance of solar systems. They recently did a check of my roof top solar system, which included checking the status of the inverter, performing the anti-islanding test, checking the connections of the panels, and cleaning of the panels.
There was a prompt response from my website enquiry, and an appointment arranged. All work was carried out as promised, the technician arrived on time, and the bill was as quoted. He also advised me of a potential fault, but advised me how to easily monitor that the system is generating power.
I'll certainly call them when the next service is due, or repairs are needed.