Marlec Solar iBoost+ Immersion Heater Controller for Solar PV Systems

The Marlec Solar iBoost+ is an intelligent controller that automatically diverts excess solar power generated by your PV system to heat water via your immersion heater. Rather than exporting surplus electricity to the grid, you can use it to reduce your water heating bills, minimise boiler use, and increase self-consumption of free solar energy.

✅ Key Features:

Automatic solar diversion: Directs surplus solar energy over 100W to your immersion heater, optimising your solar PV investment.
Proportional control: Leaves a 100W export buffer to maintain system balance and handle variations in household usage and solar output.
Supports 2 immersion heaters: Works with up to two immersion heaters rated up to 3kW each.
Integrated display showing real-time and historical savings:
- Saved today
- Saved yesterday
- Saved over the past 7 days
- Saved over the past 28 days
- Total saved
Manual Boost button: Instantly activate heating with 15-minute intervals (up to 2 hours).
Warranty: 2 years

This system helps you make the most of your solar investment by putting unused energy to work, helping you cut costs and carbon emissions.