Geyserwise Megawatt Saver (MWS) 250L 300L SMART Solar Geyser Conversion Kit
Convert Your Large Electric Geyser into a Smart, Solar-Powered System
Designed for larger households, the Geyserwise MWS SMART Solar Conversion Kit is a high-performance, Wi-Fi-enabled solution that transforms your 250L to 300L electric geyser into an intelligent solar water heating system.
This advanced plug-and-play kit uses photovoltaic (PV) solar panels to generate electricity and power your geyser directly without the need for plumbing alterations, pumps, or element replacements. Enjoy complete control and energy optimization via the Tuya or SmartLife mobile app.
Why Choose the MWS 250L300L Solar Conversion Kit?
No Plumbing Changes Just Plug In and Save
Converts standard electric geysers into solar-powered systems without pipe modifications
No pumps or moving parts reducing installation time, complexity, and maintenance
Optimized for 250L and 300L geysers, and backward compatible with 200L systems
Smart MWS Controller with MPPT Efficiency
Converts DC solar power into modulated AC using Maximum Power Point Tracking (MPPT)
Automatically uses solar energy first, with seamless switch to grid power if needed
Maintains hot water availability during cloudy or rainy days via AC backup
Works with existing geyser elements no need to replace or retrofit
Full Smart Wi-Fi Control (Tuya/SmartLife Enabled)
Remote monitoring and control via smartphone app
View live water temperature, energy usage, and system performance
Set timers, create schedules, and enable AC Boost Mode when instant hot water is needed
Premium PV Panels for Larger Capacity Geysers
Includes 400W650W Tier 1 solar panels (quantity based on kit selection)
Anti-reflective, weather-resistant coatings for maximum performance
MC4 connectors for fast, secure installation
What's Included in the Kit
Core Components
4x 545W600W PV Solar Panels (excluded if "no panel" option selected)
1x Geyserwise MWS Controller with Digital Keypad, Thermostat and User Manual
1x MWS Connection Cable
1x 8-Way Dinrail Surface Mount DB
1x 25A 2P DC Circuit Breaker
1x 500V DC Surge Arrestor
2x 6m 6mm² Solarflex Cables (Pre-Terminated, Red & Black)
Mounting Accessories (based on roof type selected)
16x Anti-Theft Mounting Clips (excluded if "no panel" option selected)
Tiled Roof: 8x Universal Roof Tile Mounting Brackets
IBR Roof: 8x Brackets with Rubber Seals & Screws
Flat Roof: 8x 3060° Tilt Brackets
Corrugated Roof: 8x Dowel Screws
Cliplock Roof: 10x Rib Clamps (20/30mm)
Note: P2000 struts are not included due to courier risk. Tile brackets, hanger bolts, and other specialized mountings are sold separately to match specific roof types.
Technical Specifications
MWS SMART Controller
Input Voltage: 120V 350V DC
Max Input Power: 4000W
Output Voltage: 40V 230V RMS (Modulated Sine Wave)
Output Current: 20A Max
AC Input: 230V / 50Hz
Communication: RS 485
Wi-Fi Enabled: Tuya / SmartLife App
Built-in Safety: Thermal cut-out, dry-burn protection
PV Solar Panels
Power Range: 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
Mounting Type: Roof brackets (per kit selection)
Geyser Compatibility & Safety
Compatible Elements: 1500W 4000W
Resistance Range: 12 27
Safety Cut-Off: Shuts off at 90°C
Smart Control: Real-time tracking, programmable schedules, energy stats
What You'll Need (Not Included)
1x External AC Isolator Switch (if not yet installed)
Approx. 4m of 2.5mm² Flat Twin & Earth Cable
Additional solar cable if distance from panels to controller exceeds 6m
Standard electrical tools for professional installation
Final Thoughts
The Geyserwise Megawatt Saver (MWS) 250L300L Kit is the ideal solution for larger households or high-volume hot water users who want to slash electricity costs and enjoy smart control. With minimal installation effort, advanced solar efficiency, and full app integration, it's the future of water heating available today.
