Geyserwise Megawatt Saver (MWS) 100L – 200L SMART Solar Geyser Conversion Kit

Convert Your Existing Electric Geyser into a Smart Solar Heating System

Upgrade your home with the Geyserwise MWS SMART Solar Conversion Kit — a revolutionary, Wi-Fi-enabled system that transforms your standard electric geyser (up to 200L) into a solar-powered, energy-efficient water heating solution.

This next-generation plug-and-play kit eliminates the need for complicated plumbing, pumps, or element replacements. Instead, it uses photovoltaic (PV) solar panels to generate electricity and directly power your geyser — with smart automation and full remote control via the Tuya or SmartLife app.

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Why Choose the Geyserwise MWS Solar Conversion Kit?

Solar Heating with Zero Plumbing Changes

• Convert your existing electric geyser into a solar geyser without replacing the element or modifying pipes

• No pumps or moving parts — reducing installation time, maintenance, and risk of leaks

• Compatible with geysers from 100L to 300L, including 150L, 200L, and 250L units

Advanced MWS Smart Controller (with MPPT)

• Converts DC solar energy into modulated AC power using Maximum Power Point Tracking (MPPT)

• Prioritizes solar power first, with automatic AC backup when solar is insufficient

• Enables scheduled heating using grid power during low sunlight periods

• Works with your existing geyser element — no replacements needed

Smart Wi-Fi Control with Tuya/SmartLife

• Full app integration for remote temperature control, scheduling, and monitoring

• View real-time solar usage and energy savings

• Set timers and schedules from your phone

• AC Boost Mode provides instant hot water when needed

Premium Tier 1 Solar PV Panels

• Includes high-efficiency 400W–650W PV panels (depending on kit selection)

• Weatherproof with anti-reflective coatings for better performance in cloudy conditions

• Pre-terminated MC4 connectors for fast, secure installation

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What's Included in the Kit

Core Components

• 3x 545W–600W PV Solar Panels (excluded if “no panel” option selected)

• 1x Geyserwise MWS Controller with Keypad Display, 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 Pre-Terminated Solarflex Cables (6mm² Red & Black)

Mounting Accessories with chosen selection.

• 12x Anti-Theft Mounting Clips (excluded with "no panel" kits)

• Tiled Roof: 6x Universal Roof Tile Mounting Brackets

• IBR Roof: 6x Brackets with Rubber Seals & Screws

• Flat Roof: 6x 30–60° Tilt Brackets

• Corrugated Roof: 6x Dowel Screws

• Cliplock Roof: 8x Rib Clamps for 20/30mm profiles

Note: P2000 struts are not included due to courier limitations. 

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Technical Specifications

MWS SMART Controller

• Input Voltage: 120V – 350V DC

• Max Input Power: 4000W

• Output Voltage: 40V – 230V RMS

• Output Current: 20A Max

• AC Input: 230V / 50Hz

• Communication: RS 485

• Connectivity: Wi-Fi (Tuya/SmartLife)

• Protection: Thermal cut-out & dry-burn safety

PV Solar Panels

• Power Rating: 400W – 650W

• Vmp: 41.79V – 43.9V

• Voc: 49.91V – 53.0V

• Imp: 11.01A – 13.68A

• Isc: 11.50A – 14.18A

• Mounting: Roof brackets included (based on option selected)

Geyser Compatibility & Safety

• Element Support: 1500W – 4000W

• Resistance Range: 12Ω – 27Ω

• Safety: Shuts off at 90°C

• Smart Features: Real-time energy tracking, timers, app control

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What You'll Need (Not Included)

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

• ±4m of 2.5mm² Flat Twin & Earth Cable

• Extra solar cable if panels are mounted over 6m from controller

• Standard electrical tools for installation

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Final Thoughts

The Geyserwise Megawatt Saver SMART Kit delivers a powerful combination of cost savings, convenience, and sustainability. It’s the perfect solution for South Africans looking to reduce electricity bills and become less reliant on the grid — without sacrificing hot water comfort.