Power to heat
tubra®-eTherm are hydraulic units
with integrated control for thermal storage of
photovoltaic electricity to optimize self-consumption
Solar pump groups tubra®-PGS and
Solar transfer stations tubra®-ÜSTA for collector arrays from 4 m² to 260 m²
PGS: The pump group for solar systems – also with integrated control system
ÜSTA S/M: The solar transfer station for stratified loading
ÜSTA L/XL: The pump groups for large solar systems
ÜSTA S/M: The solar transfer station for stratified loading
ÜSTA L/XL: The pump groups for large solar systems
tuxhorn
The use of solar energy for thermal applications can be realized by two very different technologies.
tubra®-eTherm
Intelligent thermal storage for photovoltaic electricity
The tubra®-eTherm is an innovative hydraulic unit with integrated control that converts excess solar power into heat and thus optimizes self-consumption in the household. It stores self-generated energy in drinking water storage tanks or buffer storage tanks with significantly higher capacities than batteries, ensuring efficient use of renewable energy and helping to reduce the consumption of fossil fuels.
Main features of the tubra®-eTherm:
- Easy to retrofit for buffer storage tanks or domestic hot water tanks with integrated heating coil
- The control system automatically adjusts the heating output to the photovoltaic surplus
- Recommended from a PV system output of 4 kWp
- Installed before the electricity meter to ensure priority for household electricity
- no required minimum terms or minimum benefits
- CE-compliant with regard to EMC and safety
Advantages of tubra®-eTherm:
- Simple retrofitting with existing heating hydraulics
- Constant charging temperature of 70°C creates stratified charging with utilization of the entire storage capacity and immediately usable heat
- Energy storage in buffer storage systems with significantly higher storage capacities and lower investment costs compared to battery storage systems
- The use of excess PV for hot water and heating increases the self-consumption of self-generated electricity and thus more independence
- No minimum running times or minimum performance required to start
- Saving of fossil fuels. Reduction of starts of the primary heat generator (boiler or heat pump)
- Immediately usable heat thanks to fast response times
- Cascading of several eTherm stations possible for more heating power
The tubra®-eTherm product family
tubra®-eTherm P – The compact independent hydraulic unit
- with integrated power measurement, power control and storage charging management
- Completely system-independent of the inverter and electricity meter
- Ideal for buffer storage tanks or drinking water storage tanks with registers from approx. 500 liters, with integrated control and up to 9 kW output (expandable to 36 kW)
- Smart Remote and 0-10V interface for external control
- Stratified storage tank charging with 70°C charging temperature
tubra®-eTherm P3+
- Built-in heating element:
– 3 kW output - Recommended storage tank volume:
– Ideally suited for buffer or drinking water storage tanks with registers from approx. 500 L - Recommended output of the PV system:
– from approx. 4 kWp
- Built-in heating element:
– 9 kW output - Recommended storage tank volume:
– Ideally suited for buffer or drinking water storage tanks with registers from approx. 800 L - Recommended output of the PV system:
– from approx. 10 kWp
tubra®-eTherm C – The eTherm in combination with external energy managers
- Power measurement and control by an external energy manager
- Control of the heating element can be modulating or switched depending on the energy manager
- Ideal for buffer storage tanks or drinking water storage tanks with registers from approx. 500 liters, with integrated control and up to 9 kW output (expandable to 36 kW) Stratified storage tank charging with 70°C charging temperature
tubra®-eTherm C3+
- Built-in heating element:
– 3 kW output - Recommended storage tank volume:
– Ideally suited for buffer or drinking water storage tanks with registers from approx. 500 L - Recommended output of the PV system:
– from approx. 4 kWp - External energy manager:
– compatible energy management system required
- Built-in heating element:
– 9 kW output - Recommended storage tank volume:
– Ideally suited for buffer or drinking water storage tanks with registers from approx. 800 L - Recommended output of the PV system:
– from approx. 10 kWp - External energy manager:
– compatible energy management system required
tubra®-eTherm S – The eTherm in combination with external energy managers
- with integrated power measurement, power control and storage charging management
- Completely system-independent of the inverter and electricity meter
- Ideal for retrofitting to existing storage tanks with 6/4″ socket
- Ideal for hot water buffer tanks from 200 liters
- Fast power modulation of an electric immersion heater, 0-3kW or 0-9kW
tubra®-eTherm S3
- Heating element:
– 3 kW output - Recommended cylinder volume:
– Ideally suited for buffer or hot water cylinders with registers from approx. 200 L - Recommended output of the PV system:
– from approx. 4 kWp
- Built-in heating element:
– 9 kW output - Recommended cylinder volume:
– Ideally suited for buffer or hot water cylinders with registers from approx. 400 L - Recommended output of the PV system:
– from approx. 10 kWp
Product group Power to Heat
The station for storing surplus electrical energy as heat in the buffer or hot water tank
for the product ▸
External electric heater for loading buffer cylinders with target temperature for optimum cylinder stratification.
The tubra®-eTherm S detects excess power from PV systems, determines the available power and passes it on to an electric heating system
about the product ▸
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Product group Power to Heat
eTherm C3/9
Modulating 0 – 3 kW
eTherm C3/9
3 kW or 9 kW version
eTherm S
Modulating 0 – 3 kW