• Machen Sie das Beste aus Photovoltaik:
  • 1


Optimal - for maximum self-consumption.

AC ELWA-E is a 0 - 3 kW linearly controlled water heating device for grid-connected photovoltaic systems. It uses excess PV energy for hot water heating and thus optimizes the self-consumption of the system. The linear control of the power sets the PV feed-in power to zero.

The AC ELWA-E also has our proven hot water boost-backup function: if the sun does not seem to be enough, the hot water can optionally be heated to the desired temperature by using energy from the public power grid.

It can be installed in hot water boilers and buffer storages.


Tip Grid-connected PV systems achieve an average of only 30% self-consumption. In an typical household (5 kWp PV system), self-consumption with the AC ELWA-E can easily be increased up to 75%.


Hausgrafik AC ELWA E PM EN

AC ELWA-E in combination with
my-PV Power Meter

In combination with my-PV Power Meter, the AC ELWA-E uses only excess energy from your photovoltaic system. The heat output is linearly controlled so that no energy is fed into the grid and your self-consumption increases significantly.

Further information about my-PV Power Meter.


Hausgrafik AC ELWA E EN

AC ELWA-E in combination with
battery storage

AC ELWA-E is compatible with many commercially available battery storage systems. Thereby it takes into account the optimal use of photovoltaic energy.

AC ELWA E KilowattExcess EN

Click here for the compatible manufacturers.


Hausgrafik AC ELWA E SmartHome EN

AC ELWA-E in combination with Smart Home

Thanks to its flexible control, AC ELWA-E also communicates with smart home and energy management systems. The control is then carried out by the smart home system. As a result, even complex controls with consumer priority regulations can be realized.

In apartment buildings, we realize systems with a huge number of devices on this basis. Remote monitoring and energy billing at the apartment level are possible.

Click here for the compatible manufacturers.


Tip Here are the projects, that we have implemented with innovative partners.



hakerl Installation in hot water boilers and buffer storage possible
hakerl Easy communication via network cable or powerline
hakerl Heating power is linearly controlled
hakerl Practically no energy is fed into the grid
hakerl Self-consumption increases significantly
hakerl Flexible control by various inverters, battery systems and Smart Homes


Tip With our my-PV Power-Coach you can easily and quickly get a personal analysis of your system.


Technical data

Heating power 0 - 3,000 W, HF clocked, sinusoidal current consumption
Mains connection Single-phase, grounded plug, 230 V, 50-60 Hz
Protection class IP21
Connecting cable 3 m
Dimensions (WxHxD) 130x180x600 mm with heating element
Heater lengh 45 cm
Immersion heater connection 1 1/2 inch



Here you can subscribe for our newsletter