Geyserwise Megawatt Saver (MWS) 150L SMART Solar Geyser Conversion Kit | With Panels

Convert Your Electric Geyser into a Smart, Energy-Efficient Solar Water Heating System

The Geyserwise Megawatt Saver (MWS) 150L SMART Solar Geyser Conversion Kit is a next-generation, Wi-Fi-enabled solar heating solution that seamlessly converts any existing electric geyser into a solar-powered water heater.

Unlike traditional thermal solar geyser systems, which require complicated plumbing, pumps, and water circulation, this plug-and-play PV-powered system uses photovoltaic (PV) solar panels to generate electricity and heat water directly—without modifying pipes or replacing the geyser element.

With its intelligent MWS Controller, the system converts DC solar energy to AC, ensuring your existing geyser operates efficiently without additional modifications. The Tuya/SmartLife Wi-Fi integration allows full remote control, scheduling, and monitoring for optimal energy efficiency and convenience.

Key Features & Smart Functionality

✔ Solar Geyser Conversion – No Plumbing Required

• Upgrades any standard electric geyser into a solar-powered heating system with zero plumbing changes.

• No pumps or moving parts, reducing maintenance and risk of leaks or frost damage.

• Eliminates the need for complex pipe installations found in traditional solar geysers.

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

✔ Smart MWS Controller – Converts DC Solar Power to AC for Efficient Heating

• Uses advanced Maximum Power Point Tracking (MPPT) technology to convert solar DC energy into modulated AC power, ensuring maximum efficiency.

• Eliminates the need to replace the geyser element, unlike older conversion kits.

• Automatically prioritizes solar power first, switching to AC backup only when needed.

• Seamless integration with AC power, ensuring uninterrupted hot water even in low-sunlight conditions.

• Smart AC Backup Feature – Allows grid power supply to heat the water at pre-defined intervals set by the user. This ensures hot water availability even on rainy or overcast days by seamlessly switching to AC power when solar energy is insufficient.

✔ Full Wi-Fi Connectivity & Smart Control

• Tuya/SmartLife app integration for real-time monitoring, remote control, and smart automation.

• View water temperature, solar energy usage, and savings via smartphone.

• Set heating schedules and timers from anywhere for optimized energy consumption.

• AC Boost Mode for manual override, ensuring instant hot water when needed.

✔ Premium Solar PV Panels for Maximum Efficiency

• Includes high-performance 400W - 650W solar panels for optimal energy absorption.

• MC4 solar connectors for quick, secure installation.

• Weather-resistant design—built to withstand rain, hail, and UV exposure.

• Anti-reflective coating enhances solar energy collection in low-light conditions.

Technical Specifications

MWS SMART Controller (MPPT Solar Power Management System)

• Input Voltage Range: 125V DC – 350V DC

• Maximum Input Power: 4000W

• Solar Input Current: 15A Max

• MPPT Operating Range: 120V DC – 350V DC

• Solar Output Voltage: 40V – 230V RMS (Modulated Sine Wave)

• Solar Output Current: 20A Max

• AC Input Power: 230V AC / 50Hz

• Wi-Fi Connectivity: Tuya/SmartLife app (iOS & Android)

• Communication Protocol: RS 485 for display unit & smart control

• Safety Features: Built-in thermal cut-out & dry-burn protection

PV Solar Panels

• Rated Power: 400W - 650W

• Voltage at Maximum Power (Vmp): 41.79V – 43.9V

• Open Circuit Voltage (Voc): 49.91V – 53.0V

• Current at Maximum Power (Imp): 11.01A – 13.68A

• Short Circuit Current (Isc): 11.50A – 14.18A

• Dimensions: Varies based on panel selection

• Mounting Type: Roof-mounted with included brackets

Geyserwise SMART Thermostat & Safety Features

• Compatible Geyser Elements: 1500W – 4000W

• Element Resistance Range: 12Ω – 27Ω

• Safety Protection: Built-in thermal cut-out (shuts off at 90°C for overheat protection)

• Wi-Fi Features: Remote temperature monitoring, programmable timers, real-time energy tracking

What's Included in the Kit

• 2x 545W to 600W Solar Panels (Depending on availability)

• 1x Geyserwise MWS Controller with Keypad Display

• 1x MWS Connection Cable

• 1x 8-Way Dinrail Surface Mount DB

• 1x 25A 2P DC Circuit Breaker

• 1x 500V DC Surge Arrestor

• 1x 6m 6mm² Red Solarflex Cable (Pre-Terminated with MC4 Female Connector)

• 1x 6m 6mm² Black Solarflex Cable (Pre-Terminated with MC4 Male Connector)

• 8x Anti-Theft Panel Mounting Clips for P2000 Struts

Note: P2000 struts are not included in the kit due to the nature of the material and the possibility of courier damage. Additionally, roof mounting brackets such as tile mounting brackets and hanger bolts are sold separately based on the specific roof structure.

For Roof Tile Mounting, click here for universal roof tile mounting brackets or here, for Corrugated roof mounting. 

What You'll Need

• 1x External AC Isolator Switch (If not already installed)

• Approx. 4m of 2.5mm² Flat Twin & Earth Cable (If not already available)

• Possibly additional solar cable if panels are installed more than 6m away from the MWS controller

Additional Notes

Other electrical tools may be required for installation. Please ensure that the installation instructions are followed carefully to guarantee both safety and correct installation.

Final Thoughts

The Geyserwise Megawatt Saver MWS SMART Conversion Kit is the ultimate intelligent, cost-effective solar water heating solution. Whether you choose the With Panels or No Panels version, this system provides unmatched efficiency, automation, and energy savings.