Geyserwise MAX Solar Geyser Controller

What Does the Geyserwise MAX Do?

The Geyserwise MAX is an intelligent control unit for solar geysers. It replaces the standard thermostat on your existing geyser and connects to temperature sensors on both the geyser tank and the solar collector. A digital display on the unit shows real-time temperatures, system status, and performance data.

Programmable timer: Schedule the backup electrical element to operate only within specific time windows — for example, 6pm to 9pm when solar collection has ended. This prevents the element from switching on during a load shedding slot and drawing power from your solar inverter battery when it should not.

Load shedding management: By programming the timer around your area’s load shedding schedule, the Geyserwise MAX ensures the backup element does not run during outages — extending your battery backup or inverter capacity for other essential loads.

Solar performance monitoring: The controller displays current collector temperature and tank temperature, and logs how often the backup element supplements solar heating. If your solar collector is underperforming due to shading, scale buildup, or tube damage, a persistently high element-on frequency indicates a maintenance issue.

Boost function: A manual boost button activates the backup element on demand when you need a full tank of hot water quickly — for example, when guests arrive unexpectedly.

Holiday mode: Disables the backup element completely while maintaining solar collection — preventing unnecessary heating when the property is unoccupied.

Antifreeze protection: If collector temperature drops below a set threshold, the controller can activate circulation to prevent tube freezing — relevant for Gauteng winter nights.

Who Should Install a Geyserwise MAX?

The Geyserwise MAX is recommended for any solar geyser owner who wants to manage the backup element around load shedding, homeowners who have added a solar inverter and want to reduce unintentional geyser element load on the battery bank, properties with older solar geysers where collector performance has never been accurately measured, and rental property owners who want to monitor and control geyser settings remotely. The Geyserwise MAX is compatible with all standard Kwikot and Chromagen solar geysers sold by PowerVault ZA.

Installation

The Geyserwise MAX replaces the existing thermostat and adds a temperature sensor probe to the solar collector. Installation typically takes 2–3 hours and must be done by a qualified electrician. Installation cost in Gauteng is typically R1,000–R2,000. Contact PowerVault ZA at 14 Sol Street, Linbro Business Park, Sandton, Johannesburg — phone +27 83 476 8779 or email info@powervaultza.co.za — for installer referrals and to confirm compatibility with your specific geyser model.

Frequently Asked Questions

Q: Is the Geyserwise MAX compatible with my Kwikot solar geyser?
A: Yes. The Geyserwise MAX is compatible with virtually all Kwikot and Chromagen solar geysers in both low-pressure and high-pressure configurations. Confirm compatibility with PowerVault ZA if you have an older or non-standard geyser model.

Q: Can the Geyserwise MAX tell me when my solar collector is not performing?
A: Yes. The controller logs collector temperature data and how frequently the backup element activates. If the element is activating frequently during periods of good sunlight, this indicates the solar collector may be blocked, shaded, or damaged — and triggers a maintenance check.

Q: Will it save me electricity?
A: By programming the backup element to run only during specific windows and preventing it from switching on during load shedding, the Geyserwise MAX typically reduces unnecessary element activation. Users with previously uncontrolled backup elements commonly report a noticeable reduction in electricity usage after installation.

Q: Does the Geyserwise MAX work with an inverter system?
A: Yes. The Geyserwise MAX is particularly useful when combined with a solar inverter: you can programme the element to run only during peak solar export hours or to shut off completely during load shedding windows, reducing unintended battery drain.

Q: Can I install the Geyserwise MAX myself?
A: The unit requires connection to the mains electrical supply and is not a DIY installation. A registered electrician must install and connect the unit. Incorrect installation can void the manufacturer’s warranty.