Hire a reliable solar heating repair professional in North West Melbourne

I have a Chromagen solar hot water system (solar + gas split system) that's showing error message "roof lead is not connected". I have checked the connections and can see nothing wrong. Water is not increasing above 44°C (not sure if a separare issue or caused by the disconnected lead). Looking to get it fixed asap.

The Solar Heating Blanket is located on top of the house. It is leaking from 2 points. I have attached photos. There is access to the roof from the rear of the house. Will need a ladder to access. Otherwise the solar blanket is accessible. Need these leak points repaired.

Chromagen solar water heater pipe is constantly leaking droplets, needs to be repaired or replaced. Please put an offer which includes parts, labour, own tools/ladder etc. Pictures from different angles are attached. The blue tape is where the leak is happening from. Also Brivis evaporative cooler rooftop unit has a connecting pipe which is leaking. It is circled/arrowed in the picture there is a stream of water coming out. - Due date: Flexible

Need to remove the solar water heater panel from the top of roof including any plumbing work that needs to be shut and sealed. Panel to be removed is marked with red X in the picture. - Due date: Before Thursday, 29 February 2024

We have a solar heating system for our pool. It has developed a leak which is running off the front of the house through the guttering. Not sure if it's the pipework or the matting itself (I don't have a ladder long enough to check!)