This isn't something whether is makes malfunctioning, its nothing to do with that, just Project solar uk does not know how proper install solar systems, there is no end complains on trustpilot website,they getting positive feedbacks just from themselves, as seems they manipulating the feedbacks by writing them themselvesNo company would be stupid enough to give an unconditional lifetime warranty on what is essentially just a package of electronics. They will have loads of get-out clauses.
There's no reason why solar panels and inverters will last any longer than a Televison or washing machine.
I suspect they'll be a higher than normal failure rate over the next few weeks whilst we have the heat waves.