ELWA
ELWA is a 2 kW photovoltaic water heating device. Direct current from photovoltaic modules is transferred directly to the built-in heating element and immediately converted into heat without loss. The built-in MPP Tracker ensures that the PV generator is always operated at the optimum operating point (similar to a PV inverter).
For operation, no connection to the mains is required as the unit is powered by the PV generator (pure off-grid operation). The desired DHW temperature is set with a rotary knob, LED displays inform about the current device status.
Your advantages with hot water from photovoltaics
Easier and cheaper than thermal solar systems
Each watt is utilized: Linear control from 0 to 2 kW, depending on PV yield.
No grid operator approval required: You save yourself tedious administrative work, because ELWA does not feed electricity into the grid. Especially in multi-storey apartment projects, the approval can take several months for grid-connected PV systems.
Easiest installation with "cables instead of pipes", less valuable copper, no maintenance costs.
Stratification-heating possible with 2 devices.
Even works in case of power failure.
Boost-backup optionally usable.
No anti-freezing liquid necessary
Cables have almost no energy loss compared to pipes
DC Operation
DC voltage = MPP voltage range 100 – 360 V (max)
Number of MPP trackers 1
Max. input current 10 A, limited
DC nominal power 2.000 W at 25° C ambient temperature, built-in derating
DC inputs MC4, 1 string
AC Operation
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
General data
MPP-efficiency 99.9 %
Total 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 190 x 600 mm including heating rod
Weight 2 kg
Heating rod length 45 cm
Heating rod thread dimension G 1 1/2 inch
