EMMA, The Energy and Micro Generation Manager

About EMMA

EMMA can be used to control loads ranging from 1 kW to 300 kW, on single- and three-phase connections. EMMA suits all new and existing grid-connected generators, from domestic to large-scale solar PV, wind turbines and water turbines (hydro).

Which EMMA do I need?

EMMA's functions

  • Optimisation of output utilisation:
    EMMA diverts surplus power from your generator to one or more thermal stores (immersion heaters, storage heaters, swimming pools etc.). While doing this EMMA holds electricity export at or close to zero. This function is standard to all EMMA units, including EMMA for Home, and with or without the Export Control (EC) add-on.
  • Export control:
    EMMA can limit electricity exports from your generator to whatever your DNO permits. This allows you to grid-connect generators where otherwise it would not be permitted, and at the same time enables you to avoid expensive Network Upgrade Costs. The EC function kicks in when the thermal store(s) are 'full' (have reached their target temperatures) or are otherwise not available and surplus electricity needs to be managed in other ways to prevent excessive export. This is the EC (Export Control) function provided by EMMA's optional EC add-on.
  • Grid voltage stabilisation:
    EMMA keeps the supply voltage below the DNO's permitted limit to prevent the inverters tripping. This is the GVS function (Grid Voltage Stabilisation) - also provided by EMMA's optional EC add-on. Avoiding unnecessary inverter trips prevents power outages and saves you money.

EMMA 3G from Cool Power ProductsThe optional Export Control (EC) add-on is available for all EMMAs.

ELITE Control

The ELITE is the latest addition to the EMMA product family. While we consider it to be the Elite of power diversion and monitoring it is in fact EMMA's little sibling or as we call it EMMA lite.


EMMA Cascade

The modular heating system that can grow and grow


EMMA with Export Control

EMMA with EC allows for installs to have a greater renewable output than the Max Export Capacity (MEC) on site by diverting excess energy to heat.