About Geyser Wise

The inception of Geyserwise in 2004 was the brainchild of Meinhard Fourie, when he identified a need in the market to measure and manage the electrical consumption of the common household geyser.

The first Geyserwise units were developed and tested in 2005 with assistance from the Cape Peninsula University of Technology, and has since evolved into the Geyserwise Max – the controller of choice of the solar water industry in South Africa.

In 2010 Geyserwise won the residential category in the prestigious ETA Awards, an Eskom sponsored initiative to reward Energy Efficiency. “A distinct feature of the Geyserwise product is the increased level of awareness of energy efficiency and behavior change among the users.”

Geyserwise continues to critically analyse energy consumption across a wide array of residential and commercial users, to identify opportunities to reduce or to improve efficiencies in the application thereof.

Geyserwise Max

Use as a geyser timer

• Clear display of water temperature, time, day, heating mode and malfunction conditions.
• Auto or manual heating.
• Easy temperature setting to your requirements (30 – 65°C) factory default is 55°C.
• Four different temperature settings.
• Daily programmable timer with four time settings.
• Error conditions alert by warning code E1 to E7.
• Electronic thermostat with mechanical thermal cut-out at 90°C.

Use as timer on a thermosyphon solar system

• Clear display of water temperature, time, day, heating mode and malfunction conditions on solar system and geyser.
• Auto or manual heating.
• Easy temperature setting to your requirements (30 – 65°C) factory default is 55°C.
• Four different temperature settings.
• Daily programmable timer with four time settings.
• Error conditions alert by warning code E1 to E7.
• Electronic thermostat with mechanical thermal cut-out at 90°C. Please note the cut-out temperature for solar systems expected to reach temperatures above this temperature.

Use as timer and differential control on pumped solar system

• Clear display of water temperature, time, day, heating mode and malfunction conditions on solar system and geyser.
• Auto or manual heating.
• Easy temperature setting to your requirements (30 – 65°C) factory default is 55°C.
• Four different temperature settings.
• Daily programmable timer with four time settings.
• Error conditions alert by warning code E1 to E9.
• Electronic thermostat with mechanical thermal cut-out at 90°C. Please note the cut-out temperature for systems expected to reach temperatures above this temperature.
• Differential controller 12V and 220V systems.

Technical Parameters

• Operating voltage 230VAC / 50HZ.
• Main Relay contact rating 30AMP (Max 4KW).
• Secondary relays pump and solenoid 5Amp.
• Operating voltage range 160V – 250V AC.
• Earth leakage protection at 25MA action time = 0,1 second.
• Temperature display range 0 – 99°C (“-5” when below -5°C “EA” when above 99°C).
• High temperature warning above 84°C.
• Temperature setting ranges 30 – 65°C (heating water electrically).
• Heat failure – when increase at a rate of less than 4°C per hour.
• Electronic thermostat with mechanical thermal cut-out at 90°C.
• Dry heat detection – empty cylinder.
• Temperature tolerance ± 2%.
• Temperature differential setting 1°C.
• Switching differential 6°C.
• 2nd temperature probe for solar.
• Solar differential 7°C.
• Temperature probe failure detection for both collector and tank.
• Temperature probe range for geyser is -30 to + 130°C.
• Temperature probe range for collector is -30 to + 260°C.
• Isolate both L + N when in off state.
• Collector antifreeze protection at 5°C

Geyserwise Dual

Use as a geyser timer

• Clear display of water temperature, time, day, heating mode and malfunction conditions.
• Auto or manual heating.
• Easy temperature setting to your requirements (30 – 65°C) factory default is 55°C.
• Four different temperature settings.
• Daily programmable timer with four time settings.
• Error conditions alert by warning code E1 to E7.
• Electronic thermostat with mechanical thermal cut-out at 90°C.

Use as timer and controller on GeyserWise PV waterheating system

• Clear display of water temperature, time, day, heating mode and malfunction conditions on PV system and geyser.
• Auto or manual heating.
• Easy temperature setting to your requirements (30 – 65°C) factory default is 55°C for AC and 65°C for DC.
• Four different temperature settings.
• Daily programmable timer with four time settings.
• Error conditions alert by warning code E1 to E7.
• Electronic thermostat with mechanical thermal cut-out at 90°C.
• LDR control to control AC vs DC mode of water heating.

Technical Parameters

• Operating voltage 230VAC / 50HZ.
• Main relay contact rating 20AMP (Max 3kW element).
• Operating voltage range 160V – 250VAC.
• Control circuit 5.5 – 12VDC.
• Earth leakage protection at 25mA action time ≤ 0,1 second.
• Recommended ambient temperatures: -20 to 55°C; Max 75°C.
• Temperature range 0 – 200°C (“-5” when below -5°C).
• DC on at set light value up to 75°C.
• DC differential between 3 – 7°C (control DC element in on or off state).
• 230 VAC temperature setting ranges 30 – 65°C.
• 230 VAC heat failure – when increase at a rate of 4°C or less per hour.
• Mechanical thermal cut-out 90°C (300 manual resets).
• Thermal cut-out – Isolate live.
• Dry heat detection – empty cylinder.
• Temperature tolerance ± 5°C and manufacturing drift is less than 6°C.
• Temperature differential setting 1°C.
• 230 VAC switching differential for the element 6°C.
• LDR sensor for light detection.
• LDR settable 150 – 200 value
• Temperature probe failure detection for tank.
• Temperature probe range for geyser is -30 to +130°C.
• Light level 1 range 0 – 230.
• Isolate both L + N when element in an off state.
• Control box insulated – Class 1.
• Operating life – 50 000 cycles.

Geyserwise Delta T

Use as timer and differential control on pumped solar system

• Clear display of water temperature, time, day, heating mode and malfunction conditions on solar system and geyser.
• Auto or manual heating.
• Easy temperature setting to your requirements (30 – 65°C) factory default is 55°C.
• Four different temperature settings.
• Daily programmable timer with four time settings.
• Error conditions alert by warning code E2 to E5 and E7 to E9.
• Electronic thermostat with mechanical thermal cut-out at 90°C. Please note the cut-out temperature for systems expected to
  reach temperatures above this temperature.
• Differential controller 220V pumped solar system

Technical Parameters

• Operating voltage 230VAC / 50HZ.
• Main relay contact rating 20AMP (Max 4KW).
• Secondary relays pump 5Amp.
• Operating voltage range 160V – 250V AC.
• Temperature display range 0 – 200°C (“-5” when below -5°C “EA” ).
• High temperature warning above 85°C.
• Temperature setting ranges 30 – 65°C (heating water electrically).
• Heat failure – when increase at a rate of less than 4°C per hour.
• Electronic thermostat with mechanical thermal cutout at 90°C.
• Dry heat detection – empty cylinder.
• Temperature tolerance ± 2%.
• Temperature differential setting 1°C.
• Switching differential 6°C.
• 2nd temperature probe for solar.
• Solar differential setting range 7°C – 15°C.
• Temperature probe failure detection for both collector and tank.
• Temperature probe range for geyser is -30 to + 130°C.
• Temperature probe range for collector is -30 to + 260°C.
• Isolate L when in off state.
• Collector antifreeze protection setting range 0 – 10°C.

Geyserwise TSE

Use as a geyser timer

• Clear display of water temperature, time, day, heating mode and malfunction conditions.
• Auto or manual heating.
• Easy temperature setting to your requirements (30 – 65°C) factory default is 55°C.
• Four different temperature settings.
• Daily programmable timer with four time settings.
• Error conditions alert by warning code E2 to E5.
• Electronic thermostat with mechanical thermal cut-out at 90°C.

Use as timer on a thermosyphon solar system

• Clear display of water temperature, time, day, heating mode and malfunction conditions on solar system and geyser.
• Auto or manual heating.
• Easy temperature setting to your requirements (30 – 65°C) factory default is 55°C.
• Four different temperature settings.
• Daily programmable timer with four time settings.
• Error conditions alert by warning code E2 to E5.
• Electronic thermostat with mechanical thermal cut-out at 90°C. Please note the cut-out temperature for solar systems expected to reach temperatures above this temperature.

Technical Parameters

• Operating voltage 230VAC / 50HZ.
• Main relay contact rating 30AMP (Max 4KW).
• Operating voltage range 160V – 250V AC.
• Temperature display range 0 – 99°C (“-5” when below -5°C “EA” when above 99°C).
• High temperature warning above 84°C.
• Temperature setting ranges 30 – 65°C (heating water electrically).
• Heat failure – when increase at a rate of less than 4°C per hour.
• Mechanical thermal cut-out at 90°C. Please note the cut-out temperature for systems expected to reach temperatures above this temperature.
• Dry heat detection – empty cylinder.
• Temperature tolerance ± 2%.
• Temperature differential setting 1°C.
• Switching differential 6°C.
• Temperature probe failure detection for tank
• Temperature probe range for geyser is -30 to + 130°C.