myenergi Eddi

The myenergi Eddi is the default choice for solar diversion in the UK — the best-selling unit by a significant margin. It works by continuously monitoring your generation and consumption, then routing any surplus to your immersion heater in real time, preventing it from being exported to the grid at low SEG rates.

Why it works well

The Eddi uses myenergi's proprietary continuous monitoring rather than a simple relay, so it ramps the power smoothly rather than switching in 250W blocks. This means more of your surplus is captured rather than wasted. The myenergi hub (required for app access, sold separately at ~£50) connects the Eddi to your home network and integrates with a Zappi EV charger if you have one.

Watch for

The myenergi hub is not included in the box price. If you don't need app control, the Eddi works standalone without it — but you lose remote monitoring and tariff scheduling. Requires a competent person to install (connects to your consumer unit).