my-PV 3 kW heating element for AC-THOR – screw-in heating element

Name: my-PV 3 kW heating element for AC-THOR - screw-in heating element
Brand: my-PV
SKU: 27200
Price: 229.00 EUR
Availability: InStock

229€

Contains 19% VAT.

excl. Shipping

Delivery time: up to 5-8 working days

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Perfect complement to the AC-THOR – Specially developed heating element for stepless control with my-PV power managers (AC-THOR, AC-THOR 9s, SOL-THOR)
Simple installation – Fits into standard hot water and buffer storage tanks thanks to its 1,5 inch thread; direct connection to AC-THOR via Schuko plug is possible.
Durable construction – Low thermal surface load on the heating elements significantly increases product lifespan and minimizes limescale buildup.
Integrated temperature controller – Manual setting of the target temperature (34-78°C) via rotary knob, safety temperature limiter included
Versatile useable – For hot water preparation and heating support in fresh water and buffer storage tanks

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Description

Use excess PV power for hot water – with the my-PV 3 kW screw-in heating element

Do you have an AC-THOR Power Manager or would you like to use your excess PV power for hot water? The my-PV 3 kW screw-in heating element is an electric heating rod specifically designed for stepless control by the my-PV Power Manager.

What exactly is it? An electric heating element with a 3 kW output that is installed directly into your existing hot water storage tank or buffer tank. In combination with a my-PV Power Manager (AC-THOR, AC-THOR 9s or SOL-THOR), it continuously converts your excess PV energy into heat.

Here's what you should know about screw-in radiators

Developed for my-PV Power-Manager

The screw-in heating element was designed by the Austrian manufacturer my-PV specifically for use with their power managers. Its design allows for stepless control from 0 to 3.000 watts – compatible with AC-THOR, AC-THOR 9s, or SOL-THOR control systems.

What does that mean in concrete terms? Unlike conventional on/off heating elements, this combination also utilizes small surpluses of PV power. Even with only 500 watts of available power, the heating element operates , instead of only activating above a minimum power level.

Designed for longevity

The design of the screw-in heating element ensures low thermal surface loads on the heating elements. This has the following effects:

Longer service life thanks to gentle operation
Less limescale buildup compared to conventional heating elements
Reliable continuous operation possible

Users report in forums that the system has operated smoothly for several years without any failures or performance losses.

Uncomplicated installation

The screw-in heating element can be installed as follows:

Installation in the storage unit: Standard 1,5 inch thread fits most hot water and buffer tanks
Connection to AC-THOR: Direct connection via 2,8 m Schuko plug – no additional cabling required
Set temperature: Set the desired target temperature using the rotary knob (34-78°C)
Complete: The AC-THOR automatically detects the shutdown and goes into standby mode.

Note: The manufacturer recommends installation by a professional. However, installation is straightforward if a 1,5-inch connection is already present.

This is how the combination works in practice.

With AC-THOR or AC-THOR 9s (grid-connected)

The AC-THOR continuously measures the PV surplus and controls the screw-in heating element steplessly with second-by-second precision . As soon as excess solar power is available, it is immediately converted into heat and stored in the storage unit.

Practical example:

10:00 AM: 800W surplus → heater runs at 800W
11:00 AM: 2.500W surplus → heater runs at 2.500W
12:00 PM: Cloudy, only 300W surplus → heater runs at 300W
Result: Continuous use of the PV surplus

With SOL-THOR (off-grid)

In off-grid systems, the SOL-THOR uses the entire yield of the PV modules directly for heat generation. The screw-in heating element converts the direct current into heat without conversion losses.

Important for SOL-THOR application: The Schuko plug may be removed without loss of warranty, as the SOL-THOR requires direct wiring.

temperature control

Use the rotary knob to set the desired target temperature (approx. 34-78°C). The integrated safety temperature limiter at 98°C protects against overheating. Once the water reaches the set temperature, the thermostat switches off – the AC-THOR detects this automatically and goes into standby mode.

Technical Details & Applications

Applications

Warmwasserbereitung:

Drinking water storage tank (fresh water storage tank)
domestic hot water storage tank
Electric boiler

Heating support:

Buffer storage tanks for pellet, gas or oil heating systems
Combined storage tank
Layered storage

Typical use cases:

Summer hot water preparation: In summer the main heating remains off, the heater It handles hot water preparation using PV electricity
Heating support during the transition period: In spring and autumn, the heater the pellet or gas heating system on sunny days
Backup function: In the event of a failure of the main heating system, the heater Continue to provide hot water via mains power (optional)
Combination with solar thermal energy: In existing systems with solar thermal energy, the heater Heat generation in the presence of insufficient sunlight

Compatibility

Compatible with:

my-PV AC-THOR (for 3 kW)
my-PV AC-THOR 9s (for up to 3x 3 kW)
my-PV SOL-THOR (off-grid)

Suitable accessories:

my-PV AC-THOR Power Manager
my-PV AC-THOR 9s Power Manager
my-PV SOL-THOR DC Power Manager
my-PV WiFi Meter
Additional temperature sensors

You can find other compatible manufacturers and integration instructions here.

Technical information

Maximum power: 3.000 W
Heating capacity: 0 – 3.000 W when controlled by AC•THOR
Mains connection: Single-phase, safety plug, 230 V, 50 Hz
Connection cable: 2,8 m
operating temperature rangeThe ambient temperature at the housing must not exceed 35 °C.
Protection class: IP45K
Dimensions (W x H x D): 88 x 88 x 518 mm
Weight 1,65 kg
Heating cartridge connection: 1 1/2 inches
Heat-free zone: 130 mm from the sealing surface
Warranty: 2 years (excluding calcification)
Tightening torque: 60 Nm
Max. operating pressure: 10 bar
Safety temperature limiter: 98 ° C
Version without thermostat: 105 ° C
Installation position: horizontal
Target temperature range: approx. 34 – 78 °C
Version without thermostat: according to AC•THOR setting

Frequently Asked Questions (FAQ)

Will the screw-in heating element fit in my storage tank?

The screw-in heating element has a standard 1,5-inch thread and fits most common hot water and buffer storage tanks. The heating element is approximately 39 cm long from the sealing surface, and the unheated zone begins 13 cm from the sealing surface. Before purchasing, please check whether your storage tank has a suitable connection or whether an adapter for the inspection port can be used.

Can I heater Can it be used without my-PV Power-Manager?

The screw-in heating element also functions as a normal electric heating element . However, stepless control and thus optimal use of excess PV power is only possible in combination with a my-PV Power Manager. Without a Power Manager, it runs continuously at full power until the thermostat reaches the set temperature.

What power output do I need – 3 kW or 9 kW?

That depends on your setup:

3 kW screw-in heating element: For AC-THOR (0-3 kW) and SOL-THOR, suitable for normal hot water preparation in single and two-family houses
9 kW screw-in heating element: For AC-THOR 9s, useful for larger storage tanks, higher heat demand, or if you want to combine multiple heating elements.

Guideline: For average single-family homes with PV systems up to 10 kWp, the 3 kW heating element is usually sufficient.

How quickly does it heat up? heater the water?

Heating 100 liters of water by 10°C requires approximately 1,16 kWh. With a 3 kW immersion heater, this takes about 23 minutes at full power . For a typical 300-liter hot water storage tank, this means: from 20°C to 60°C (a 40°C temperature difference): almost 5 hours at full power. In practice, heating with excess PV power usually runs in the background over several hours, which is sufficient since the hot water remains stored in the tank.

What about calcification?

Thanks to its low thermal surface load, the my-PV screw-in heating element is less prone to limescale buildup than conventional heating elements with high surface temperatures. Users report trouble-free operation for years. However, in areas with very hard water (over 14°dH), regular checks are still recommended.

Do I need an electrician for the installation?

The manufacturer recommends professional installation. However, the electrical connection is simple: just plug the AC-THOR into a standard household plug. Mechanical installation in the storage tank requires draining the water and screwing in the heating element using the appropriate tool. If you have the necessary skills and the connection is already in place, this is manageable; however, if you are unsure, you should consult a qualified electrician.

How long does a screw-in radiator last?

Thanks to its high-quality construction and gentle operation, users report trouble-free operation for many years . The manufacturer's warranty is 2 years. The actual lifespan depends on water quality and usage intensity, but is typically 10-15 years or more.