I’ve had a solar panel and battery installation for some years but I didn’t have a way of diverting excess power to the immersion heater in my hot water tank. I discussed options with Mark just over a year ago. He recommended an Eddi, which he fitted the following week. With 12 months experience, I can say that this was a very good call. I rarely use any gas at all during the summer now and the system has behaved perfectly. Mark can monitor it remotely, so any problem would show up straight away. I’m thus very confident about the system itself and Mark’s installation of it, which, by the way, took less than a morning and was achieved without any fuss at all.