Geyser Gecko SG4000 PV Geyser Controller

The Geyser Gecko SG4000 is a water-heating controller system that turns your geyser into a smart-controlled device. It can operate completely stand-alone (off grid) or connect to your existing grid setup. The controller takes both normal grid AC and solar PV input as power sources. The system can convert the DC signal from the solar panels into a pulsed DC signal that is suitable for a geyser element. The controller also automatically switches between PV and AC when required. The Geyser Gecko can be controlled and monitored remotely by using the Geyser Gecko Mobile App.

Hybrid Solar Geyser Solution

The Geyser Gecko is your answer to a hybrid solar geyser. It uses solar panels to heat up your existing electrical geyser (up to 4 kW geyser elements supported). It can be set up to operate as a hybrid between AC and PV power, where AC power is partially used to heat up the water and the solar panels heat it up further. It can also be used in PV-only mode, where only solar panels are used to heat up the geyser. It can be monitored and configured remotely by using the Geyser Gecko mobile companion app.

Key Features

• Easy Installation: The Geyser Gecko can be installed into existing electrical geyser installations and does not require a different geyser element.
• Save Energy: More than 50% savings on geyser power usage.
• Powerful: Supports geyser elements of up to 4kW.
• Solar Support: Supports solar panels with a combined maximum open-circuit voltage of 250V and short-circuit current of up to 15A and 2000W of panel power is recommended.
• Accurate Readings: Accurate geyser temperature measurement with a digital probe (supplied with the Geyser Gecko).
• PV Input: Can function with PV input only.
• Hybrid Functionality: AC and PV mode provides a hybrid solution between solar and the power grid, with the power grid used to supplement the PV power.
• Adaptable: Can be used with existing conventional geyser installations; does not require any special geyser element.
• Mobile App: Can be monitored and controlled remotely by using the Geyser Gecko mobile companion app.

The Geyser Gecko Kit

• Geyser Gecko inverter
• Digital temperature sensor
• 20A AC 2-pole breaker and DC circuit breaker (with latest SANS switching certification)
• Change-Over: 40A (can be controlled manually if there is and issue)
• Safety and Brand Stickers
• User Manual

Technical Specifications

Description Symbol Value Unit Electrical data Input Max AC Voltage (Grid) ACINMAX 230 VRMS Input DC Voltage (Solar) DCINMAX 250 VDC Input DC Power (Solar) PMAX_IN 2000 W Max Output Power PMAX 4 kW Max Current AC IMAXac 18 A Max Current DC IMAXdc 15 A Input Frequency (AC) Fac 50 Hz DC polarity protection - Yes, max 10A - Output voltage ACOUT 80-230 VRMS Output frequency FOUT 125 Hz Output duty cycle DOUT 40-80 % Mechanical data Dimensions - 122(W) x 131(L) x 45(H) mm Weight - 0.5 kg Enclosure material - Anodized aluminium - Ambient conditions Operating temperature range TOP 0-40 °C Operating humidity range H 0-80 % Safety Certification - - IEC 60730-1:2013 / SANS 60730-1:2016 Click here to view certificate Regulatory Compliance NRCS - RCC No: 2401002 -

Installation kit required

• Geyser Gecko controller (1x Geyser Gecko per geyser)
• Distribution Board (Type depending on location of installation)
• Note: NOT IN ROOF; recommended as close as possible to the main DB board
• Solar PV Panels:
  • Recommended max input: 1800W max
  • For optimal results: use at least 1600W of combined PV power
• Rails: According to panel size
• Tile Brackets: Depending on the quantity of panels/roof type
• Anti-Theft Clips:
  • Depending on the quantity of panels (4 clips per panel)
• 4mm PV Cable (Black): Length depending on location
• 4mm PV Cable (Red): Length depending on location
• Earth Cable:
  • Length depending on location and DB
• Lagging:
  • Length depending on location
  • Cable ties to secure digital temperature probe
• Conduit: Depending on location
• Sprag: Depending on location
• MC4 Male/Female Connector
• CAT5E/CAT6+FTP+Shielded Cable:
  • Depending on location of installation to extend digital temperature probe
• Ventilation Plug: Depending on location of installation
• Wi-Fi:
  • Confirm installation has reliable Wi-Fi reception in the location that installation is being done