No. Turning up a heat pump is not like turning up a bar or fan heater. If you turn a fan heater from 1200w to 2400 watts it heats up a second bar, in effect giving you a second source of heating (and also costing you twice as much). A heat pump has a constant level of power....

A hydronics system simply heats water and moves it through sealed pipes to radiators throughout the home. The sealed system can also be used to heat towel rails, floor slabs, even swimming pools, anywhere where it is needed.

oth – depending on what type of system you are using. A Solar PV (photo voltaic) system converts sunlight into electricity which is either used immediately or stored in a battery for later use. A solar thermal system takes the sun’s heat and transfers it into water which is used immediately to heat rooms or pools etc or else is stored for later use in a hot water tank.