We had our old meter “upgraded” to a smart meter last week. We have solar panels and an Immersun power diverter which sends PV energy to the immersion heater . After installation of the smart meter the Immersun seemed to be acting the wrong way round. Although the IHD and the solar anel invertor would clearly show us exporting energy when it was sunny, the Immersun display showed the opposite; taking energy from the grid when sunny and exporting during the night! It also failed to heat any water. Investigation eventually found the reason.. The immersun has a sensor that clamps around the incoming live wire. The engineer temproarily removed the sensor and had refitted this the wrong way round. Simply unclipping and reattaching the sensor the other way round seems to have fixed the problem and it is working now.
I mention this in case anyone else has met this problem.
