Picking a good installer is crucial, you've got to pick the right installer for the system. You can have the best panels and the best inverter, but if it's not installed properly and it's not installed as per manufacturer specifications, your warranties are void and the system will not work as your expected generation. Yeah, if you get the wrong installers for your products, so you pick a company that comes in on price, with a good quality product, but they use a contractor who's paid a minimal right to come and install your system for you, issues can arise when they're don't install the product properly. And then three or four, five years down the track, you have a problem with the system, they're no longer around, they're not answering the phone. If that is a case, if the system hasn't been installed properly, you can you can't expect an a manufacturer to honour a product warranty if it hasn't been installed properly.
Why does a poor quality solar power installation void your product warranty?