The immerSUN is our state of the art' energy saving device. It helps you to self-consume the green energy produced by your microgeneration system, and is compatible with all renewable generation technologies, including solar PV, wind turbine and hydro systems. The device is essentially an automatic power controller that diverts surplus power to a designated load, normally a hot water heater, to save energy and minimise your utility bills. Compatible with all inverters, smart meters and energy monitoring systems, the immerSUN boasts an extensive range of additional features. This controller really is the perfect addition to any PV or wind turbine installation. Once installed, the next-generation system will reduce an average household's energy bill by up to £250 per year by diverting microgen-generated electricity directly to an immersion heater, storage heater, and/or electric underfloor heating. This helps users to significantly reduce utility bills, lower mains reliance and improve the eco credentials of their property, without affecting FiT payments.
  • Tracks surplus power and diverts this energy to the load
  • Manual boost function for both heater outputs
  • Optional wireless current sensor
  • No need to change the existing immersion heater
  • Clear graphical backlit LCD display
  • Built-in 7-day programmable boost timer
  • Savings can be displayed in several currencies as well as kWhs
  • Up to 5 immerSUN units can be linked using wireless technology, therefore, the total surplus of around 15kW can be consumed on each phase if required

Technical specification

Years Guaranteed3Width152 mmLength235 mmHeight72 mmCompatible WithCompatible with all inverters, smart meters and energy monitoring systemsColourGrey


Solfex Immersun MK2 Pv Water Heating Controller IM-T1060



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