Hi,   I just happened to mention to the ASHP company that I would like to use PV when there is enough/excess capacity to heat the hot water via an immersion. They had planned to use the Ecodan pre-plumed hot water tank (300lt), and they don't seem to think this is possible.   What have people done here?? Have you drilled/tapped a secondary immersion to the tank, or do you just use the power from the PV to run the ASHP/immersion as and when it needs?    I'm confused