I had the iboost fitted as in summer we will have way over the solar power we need, and the boiler could be turned off, today it tells me I have exported 9.2 kW hour, better to use it. However noted it was working before my battery was fully charged, not that much of a problem, but not ideal, then tonight I realised it was at 9 pm discharging my battery to heat the DHW, so flicked the switch. And send an email. I have not touched the settings, one reason is they did not leave a manual on how to use it, found one on internet, but not sure right one for the unit. I will guess the CT unit and sender are too far away, but would have expected some screen report, where fitted I need a mirror to read the screen so not easy, but seems to say "Heating by Solar 0.57 kW Htr1" which looking at manual means "Solar iBoost+ is diverting energy to the hot water tank. The instant value of energy being diverted is shown together with an indication of the immersion heater currently being supplied (if two heaters are connected will switch between Heater 1 and 2). When energy is diverted the blue symbol flashes:" so I am leaning towards a faulty unit?