Item number: 3697
EAN: 4250497811962

my-PV ELWA off-grid electrical water-heater

ELWA is a photovoltaic hot water generating device with a nominal power of 2kW.

The direct current obtained from the PV modules is directly transferred to the built-in heating element and converted into heat without loss. With its low installation and maintenance requirements ELWA is ideal for every household.


  • you convert self-generated electricity into hot water
  • more cost-effective and simpler than common thermal solar systems
  • no utility connection is required and therefore official procedures are not necessary
  • increase your self-consumption rate by over 70%
  • you produce hot water even in case of power failure
  • no further additional components are required
  • you avoid energy loss and downtime problems


Choose tax zone / country of delivery

starting from 659,97 €

including 19% VAT.

Short supply Shipping time: 2 - 3 workdays

ELWA Kombi
ELWA Kombi
  • my-PV USB Interface for ELWA Off-Grid Electrical Water Heater

    • simple installation and communication between ELWA and PC
    • configuration
    • data evaluation
    • including 1.5m USB cable
  • my-PV Modbus Interface for ELWA Off-Grid Electrical Water Heater

    • Link between ELWA and Modbus bus System
    • Hot water safeguarding via temperature sensor possible
    • Data Evaluation
    • Modbus parameters can be found in the operating instructions


Your configuration

ELWA photovoltaic hot water generating device 2kW

ELWA uses the direct current from solar modules directly to heat the hot water. Thanks to its independence from utility and its simple installation, the device can be used in every household. To ensure the hot water supply, ELWA can automatically reheat by using utility power. The patented system covers up to 50% of the hot water demand of a two to four person household. ELWA replaces thermal solar systems of four to ten square metres with a photovoltaic output of up to 2.1 kWp.


  • Well suited for hot water tanks from 100-1000 litres
  • Start-up consumption of only 2 Watt
  • The isolated heating element is suitable for all common types of storage tanks
  • Two ELWAs can work and communicate in shift load operation

Technical data

DC voltage = MPP voltage range 100 - 360 V (max)
Number of MPP trackers / DC inputs   1 / 1 with MC4
Max. input current 10 A, limited
DC nominal power 2.000 W at 25° C ambient temperature, built-in derating
Heating power 750 W
Mains supply single phase, 230 V, 50-60 Hz
Fuse 10 A min.
Power cord 3 m
Standby-consumption 0 W at DC operation, <2 W at AC operation
Efficiency >99 % at nominal power
Protection class IP20
Operating temperature range 10°C to 40°C
Display 3 LED’s
Interface Serial IR Interface
Dimensions (lxhxd) 130 x 180 x 600 mm  including heating rod
Weight 2kg
Heating rod length 45 cm
Heating rod thread dimension 6/4 inch
Certification CE
Warranty 2 years


USB - Interface for data evaluation

Modbus - Interface for remote monitoring

ELWA Datasheet German

ELWA Datasheet English

Elwa Manual German

ELWA Manual English

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