It depends on what you want to do with the heat pump. That solar water heater will not help you much when you want to cool your house in summer. BTW, I am not

It depends on what you want to do with the heat pump. That solar water heater will not help you much when you want to cool your house in summer. BTW, I am not sure why exverbody is exited about "heat pumps", which are just air conditionings that have been in use in Asia for decades and probably been installed a billion times