Marlec Solar iBoost+ Immersion Heater Controller for Solar PV Systems

Maximise your solar PV investment and reduce your water heating costs with the Marlec Solar iBoost+. This smart immersion heater controller automatically diverts excess solar power generated by your photovoltaic system to heat your water—cutting your energy bills, lowering boiler usage, and increasing household solar self-consumption.

🔧 Key Features:

• ☀️ Automatic Solar Diversion: Detects and redirects surplus solar energy (over 100W) to your immersion heater, reducing electricity export to the grid.
• ⚙️ Proportional Control: Maintains a 100W export buffer to ensure balance and smooth performance during solar output and usage fluctuations.
• 💧 Dual Heater Support: Powers up to two immersion heaters (max 3kW each) sequentially for flexible water heating control.
• 📊 Real-Time & Historical Display: Integrated screen shows:
  • Today's savings
  • Yesterday’s savings
  • Last 7 days
  • Last 28 days
  • Total savings to date
• ⚡ Manual Boost Mode: Activate hot water heating at any time in 15-minute intervals (up to 2 hours) for instant usage.
• 🛠️ Easy Retrofit Installation: Designed to integrate with existing solar PV and immersion systems.
• ✅ Warranty: 2-year manufacturer warranty for peace of mind.

🌍 Why Choose the Marlec Solar iBoost+?

• ✔ Increase your energy independence and reduce reliance on the grid
• ✔ Lower your carbon footprint by using solar-generated energy more effectively
• ✔ Cut down water heating costs by utilising energy you already produce
• ✔ Proven UK-designed and supported solution trusted by thousands of solar homeowners

The Marlec Solar iBoost+ is the smart way to turn your excess solar energy into real-world savings—effortlessly, automatically, and sustainably.