Geyserwise Megawatt Saver Geyser Controller

Geyserwise Megawatt Saver (MWS)

Convert Your Electric Geyser into a Smart Solar Water Heating System

The Geyserwise Megawatt Saver (MWS) allows you to transform a standard electric geyser into a smart, solar-powered water heating system without replacing the geyser element or modifying existing plumbing. Designed for homeowners who already have compatible solar PV panels, the MWS provides an efficient and cost-effective way to reduce electricity consumption while maintaining reliable hot water availability.

Unlike traditional solar thermal systems that rely on pumps, circulating water, and complex plumbing installations, the Geyserwise MWS uses advanced DC-to-AC conversion technology to power your existing geyser element directly from solar energy. The result is a simple, low-maintenance solution with intelligent energy management and seamless AC backup.

With built-in Wi-Fi connectivity and integration with the Tuya/SmartLife app, you can remotely monitor, control, and schedule your water heating system from anywhere.

Key Features

Convert Any Electric Geyser to Solar

• Upgrades existing electric geysers without plumbing modifications

• No need to replace the geyser element

• No pumps, moving parts, or circulating water systems

• Reduced maintenance requirements compared to traditional solar geysers

• Compatible with 100L, 150L, 200L, 250L, and 300L geysers

Intelligent Solar Power Management

• Advanced MPPT (Maximum Power Point Tracking) technology maximizes solar energy harvesting

• Converts DC solar energy into modulated AC power for efficient heating

• Prioritizes solar energy automatically

• Seamlessly switches to AC backup when solar power is insufficient

• Maintains reliable hot water supply in all weather conditions

Smart AC Backup Function

• User-configurable AC backup schedules

• Ensures hot water availability during cloudy periods or high-demand usage

• Reduces unnecessary grid power consumption

Wi-Fi Smart Control

• Compatible with the Tuya and SmartLife apps

• Monitor water temperature remotely

• Track solar energy usage and savings

• Configure heating schedules and timers

• Activate AC Boost Mode for rapid heating when required

• Manage your geyser from anywhere using your smartphone

Benefits

• Significantly reduces electricity consumption

• Makes use of existing solar PV panels

• No complex plumbing installations required

• Smart automation for maximum energy savings

• Reliable hot water with automatic backup power

• Easy integration into existing electrical systems

Technical Specifications

What's Included

• 1 × Geyserwise MWS Controller with Keypad Display

• 1 × Thermostat

What You'll Need

• 4 × Compatible Solar PV Panels (545W – 600W Recommended)

• 1 × External AC Isolator Switch (if not already installed)

• Approximately 4m of 2.5mm² Flat Twin & Earth Cable (if not already available)

Ideal For

• Residential solar installations

• Energy-conscious homeowners

• Existing PV system owners

• Off-grid and hybrid energy systems

• Smart home energy management

Important Installation Information

⚠️ The Geyserwise Megawatt Saver is a technical electrical product and must be installed by a suitably qualified electrician or solar installer. Installation must comply with all applicable local regulations and standards.

Incorrect installation may result in equipment damage, reduced performance, or safety risks. Acuiri cannot be held liable for failures, damages, or malfunctions arising from incorrect or unqualified installation.