Thanks. It's been replacedwith a Solax x1 2.0. Much better than my old Sma.SMA offers a repair service, however, when I had cause to enquire a couple of years ago it was terrible value for money ....customer eventually sourced a new-old-stock replacement 3000HF, with 5 year warranty, for notably less than the cost of a repair - which only offered 12 months warranty.