Immersion heater for surplus solar power
retrofit and generate hot water
1.
Your solar system generates electricity. However, more than you currently need.
2.
A smart meter reader detects your surplus and instead of feeding it into the grid...
3.
…the system controls the immersion heater according to the available surplus power. The heating output is thereby adjusted to the measured values.
4.
The available solar power is used for domestic hot water heating. Depending on your previous method of heat generation and the amount of surplus energy actually available, this can reduce the use of other energy sources for hot water preparation. If you would like to distinguish between the terms heating element, immersion heater, screw-in heater and portable immersion heater, you can find our terminology guide here.
BENEFITS
Your benefits with the novolto immersion heater
Controls:
Supported providers
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Shelly Meter
Learn moreSupported Shelly energy meters can also provide readings for the novolto controller. Check in advance whether your specific Shelly model and setup are supported.
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Check compatibility
Just ask usWhich solution is appropriate depends on your electricity meter, the measurement method, and your existing equipment. Therefore, please check the current compatibility information before purchasing.
G 1 1/2" thread
Robust brass thread for easy installation in almost all common storage systems
Precise power control
Fine control in 20-watt increments. Maximum protection with temperature control and safety shutdown.
Material 2.4858
Durable material with an optimized surface for rapid heat transfer and low susceptibility to corrosion.
Technical specifications
- Heating capacity
- up to 2.3/3.0 kW, adjustable
- Power supply
- 230V | up to 13A
- Interfaces
- Ethernet/LAN, Wi-Fi
- Power consumption
- < 1.0 W
- Efficiency
- > 99%
- Directives
- TAB, DIN EN 60730, DIN EN 62233
- Certification
- CE
- Degree of protection
- IP 43 (DIN EN 60529)
- Dimensions (LxWxH)
- 502 mm x 137 x 137
- Immersion depth
- 400 mm
- Unheated length
- 112 mm
- Weight
- 1.8 kg
- Immersion heater connection
- G 1 1/2"
- Tightening torque
- 60 Nm
- Installation method
- Horizontal
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Adjustable up to 3,000 watts
The heating output can be adjusted to the available surplus solar power. This allows even surplus below the maximum device output to be used for domestic hot water heating.
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Corrosion-resistant material
According to novolto, the heating pipes are manufactured from material 2.4858. The material is corrosion-resistant; however, limescale deposits can still occur with hard water and should be taken into account during maintenance.
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Installation and operation
Regarding the immersion heater installationThe immersion heater is installed as a screw-in immersion heater. Once installed, the front can be aligned. Operation and automatic control are managed via the novolto web app; for installation, the storage tank approval and the complete installation instructions are authoritative.
Further control options
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Local control
learn moreFor tech-savvy users, local control via MQTT is possible. The settings required for this are currently provided by novolto upon request.
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My automations
learn moreVia MQTT, control commands can be processed within your own network and integrated into custom automation logic.
We are confident in our quality. So are our customers.
Our products
Get more out of your PV system
novolto P3000 (3.0 kW immersion heater)
Repeatedly proven
See novolto immersion heater in action
FAQ
Immersion heater, storage tank and surplus solar power
What is the difference between an immersion heater, a heating cartridge, and a screw-in heater?
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The terms are used with some overlap in the field of electric water heating. The novolto product is an electric screw-in immersion heater permanently installed in the storage tank. Colloquially, the term immersion heater is sometimes also used for electric immersion immersion heaters; however, a portable kitchen immersion heater is not the same as a permanently installed storage tank immersion heater.
Does the immersion heater fit into hot water tanks, buffer tanks, or boilers?
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What matters is not the name of the storage tank, but the connection, installation space, and manufacturer approval. The novolto immersion heater has a G 1½-inch connection thread and is installed horizontally. For storage tanks without a suitable sleeve, a suitable flange solution may be considered, depending on the design.
How does the immersion heater use surplus solar power?
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A compatible measuring device records performance data at the service connection. In automatic mode, the heating output is based on the measured surplus data and uses the available solar power for domestic hot water heating. In manual mode, however, grid power can also be drawn.
Which electricity meters work with novolto?
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Automatic surplus solar power control requires a supported measurement solution, such as a compatible Shelly device, Tibber Pulse or poweropti, or a suitable system connected through MQTT. Check that your chosen solution works with your electricity meter and is supported by novolto before purchasing.
Can I control the immersion heater locally without the cloud?
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Yes. For technically proficient users, local control via MQTT is possible. The currently required MQTT settings are available from novolto upon request. For standard operation, the novolto web app remains available.
Notes and information on operation.
Here you will find information on individual operating steps.
We ask that you first check whether the frequently asked questions and notes already provide the information you are looking for.
If your answer is not there, please use our contact options to receive support from us.
Use QR codes
This is how I integrate the immersion heater into my network.
To connect your immersion heater to Wi-Fi, press the immersion heater button. When the left LED lights up blue, connect to the "novolto..." network via Wi-Fi.
Now simply use the included QR code (No. 1), or scan the code from here. Select Wi-Fi, enter the password, confirm, and you're done.
For LAN operation, you must restart your smart immersion heater after plugging in the LAN cable. To do this, unplug it once, wait ten seconds, and then plug it back into the power outlet.
Use the immersion heater
Assembly and Display
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Observe the
Operating manual
Make sure to follow the included Installation and operating manual (German) during every step of the installation. Important: Never connect the immersion heater to the power outlet while it is outside of the storage tank.
During installation, ensure that you seal the thread and turn your smart immersion heater carefully when aligning it. -
General
Operating ConditionLED system
Glowing red - Temperature sensor or power control faulty. The device must be repaired. Please contact us.
Pulsing blue - Firmware update in progress. Please wait and do not disconnect from the power supply.
Glowing green - Device is starting up. Please wait.
Pulsing green - Trouble-free operation. -
Network status
LED connection
Glowing red - No network connection, please follow the steps to set up a Wi-Fi or LAN connection.
Pulsing blue - Access point for Wi-Fi connection established; please connect using a Wi-Fi-enabled device to the network named "NOVOLTO-******".
Glowing blue - Device is online but cannot reach the novolto server; please contact us.
Pulsing green - The device is connected to the network and the novolto server. -
Domestic hot water preparation
LED heater
Glowing red - Safety temperature limiter (STL) has been triggered. Reset the STL after the cause has been resolved.
Pulsing blue - Target temperature reached. Heating inactive.
Glowing green - Heating active.
Pulsing green - Heating inactive (no surplus power reported).
