They are trading on their past reputation - avoid at all costs

Solar Advice put my solar system in 2 years ago, and the service was good, so I used them again to extend the system last week. The install team (from G Force, not a Solar Advice team) was an hour late, completely messed up the battery alignment and position (twice!) and as a result there was no more space to drill holes, so they had to modify the battery brackets.

It should have taken 6 hours, but as a result, it took 2 days and still wasn't correct - they forgot to mount the one battery bracket and didn't fit any of the battery earth cables. They also didn't take basic steps like vacuuming as they drilled and wearing gloves, so my house was a mess afterwards and the walls covered in grime and handprints. The system location is going to need to be repainted once the incorrect holes have been filled. Complete amateurish incompetence.

Told Solar Advice this wasn't acceptable and they said they'd send an internal team to rectify today. They were supposed to be here two hours ago, but didn't arrive, and I've still heard nothing.

I was prepared to pay Solar Advice's slightly higher prices for their hardware for the sake of their reputation and the good service I experienced first time round, but after this I'll never use them again and I would advise anyone reading this not to either.

A couple of months ago I phoned Solar Advice with a query regarding the inverter and never heard back from them, so I guess that should have been my warning.

Rather buy your own hardware from one of the warehouse suppliers, have it delivered, and shop round for a reputable installer who you can deal with directly.