MY PV AC ELWA 2 | Electric stepless heating element 3,5 kW hot water

Intelligent use of solar power for hot water preparation

The AC ELWA 2 is a 0–3,5 kW linearly controlled water heater for grid-connected photovoltaic systems and is the successor to our proven AC ELWA-E. To maximize the self-consumption of your existing PV system, the AC ELWA 2 uses the system's excess photovoltaic energy to heat your water. This increased energy independence also provides protection against unforeseen or rising operating costs. The PV feed-in power can be reduced to zero thanks to the linear control.
Our proven optional hot water backup function is included in the AC ELWA 2: If solar radiation is insufficient, energy from the public power grid can be used to heat the water to the desired temperature. The AC ELWA 2 can be installed in hot water and buffer storage tanks.

The advantages of AC ELWA 2 over AC ELWA-E are

• More power: 3,5 kW compared to 3,0 kW
• Very straightforward installation: the heating element and control unit can be installed one after the other.
• Easy operation via the touchscreen display
• Flexible control options: in addition to RJ45/Modbus TCP Ethernet, RS485/Modbus RTU, PWM-in, galvanically isolated relay contact
• Integrated external temperature sensor
• A second standard heating element can be controlled.
• Even more compact design than the previous model
• No cable, fixed wiring and a protective insulated plug

Hot water, even when the sun isn't shining

AC ELWA 2 in combination with my-PV WiFi Meter

In combination with the my-PV WiFi Meter, the AC ELWA 2 uses only excess energy from your photovoltaic system. The heating element's output is linearly controlled, so that virtually no energy is fed into the grid and your self-consumption is maximized.

The connection to the router is made via a patch cable or wirelessly via WLAN.

AC ELWA 2 in combination with battery storage

AC ELWA 2 is compatible with many commercially available battery storage systems. It takes into account the optimal use and prioritization of photovoltaic energy.

The battery storage system is always charged first. Once the battery is full, the AC ELWA 2 takes over storing the excess photovoltaic energy in the form of hot water. Water is the most economical form of storage and can be perfectly combined with chemical batteries. In this way, the generated electricity stays with you and is not fed into the grid.

AC ELWA 2 in combination with Smart Home

Thanks to its open-system control, the AC ELWA 2 also communicates with standard smart home and energy management systems. Control is managed by the smart home system. This allows for the implementation of complex control systems with prioritization by consumers.

In residential buildings, systems with multiple devices work together on this basis. Remote monitoring and energy cost billing are possible at the apartment level.

Included in the package:

1x MYPV ELWA 2 hot water preparation unit
1x drip protector

Downloads

Hot water preparation unit

ELWA2 datasheet
ELWA2 Installation and Operating Instructions
Dimension sheet ELWA2