I just bought a house a couple of weeks ago and we have not had hot water since we moved in. It has solar heating plus a hot water heater. I’ve had two plumbers and one electrician come out. We ended up installing a new hot water heater but still do not have hot water! Especially in the AM. Any suggestions as to what the problem is???? Should we just disconnect ourselves from the solar panels altogether? Help!
Your heater may be wired incorrectly. It sounds like the solar system is also running during the night, (you can listen to the pump after the sun goes down). If this is happening, then the pump is sending your hot water up to the solar panels and during the night, they radiate the heat and cool the water down. The electric and solar systems are essentially separate, so there is no other reason for the water not to be hot if the heater has power going to the electrical circuits.